echniquc Dear George / know little about electronics have access some pretty good equipment Id like some work radio make work add mixer dual rates exponential etc cant because dont have schematics manufacturer can tor won t suppl V Can help S Devoted Reader FIXING OLD RADIOS month brings another letter like Sometimes very rarely can lay hands necessary schematics Most often have tell reader what Im about tell too manufacturers too variations systems offered anyone keep up Changes continuous evolutionary batch servos new transmitter series change anything causes minor changes someplace Inte grated circuits make changes invisible cant see what masks changed figure out volatile hobby Someone gets bright idea makes few prototypes commits production whatever lot size prudence dictates wallet can afford units get reviewed reviewers find problems producer never anticipated Changes made units resubmitted review Eventually pass reviewers tests field reports start coming changes Production continues knows cycle unit built its time next lot go production costs have risen someone has come out cheaper better compo nent keep price constant still leave profit minor changes made accommodate new item Changes accumulate way until next revolutionary change necessary like get new frequencies big production run hobby 5000 units can see problem Add need NA GEL MFXER FOR AIRTRONICS XL A22K ATTENUATOR IL~I RED50K tvVVV4j2NI 3 AILERON AMP/IN VERTER AILERONFLAP AM WIN VERTER TO ENCODER PINS TO PIN 2 -FT BALANCEIAJ 0 z TO PINS G/W AILERONFLAP AMP/ INVERTER AMP/INVERTER__ MIXER PINS IN K BLAC11 INITIAL ADJUSTMENTS 1 Switch independent Turn transmitter 2 Check & F servos normal responses Set both reversing switches normal transmitter off 3 Set & B attenuators balance reference middle position Transmitter Set e 30 VDC transmitter off 4 Switch output mixers transmitter 5 Check & F servos Both should respond to F inputs Transmitter off 6 Switch Pin 2 reverser Transmitter servo should operate reverse 7 Moving flap control full range should make both servos rotate 450 adjust balance til both move equally adjust F attenuator 450 B Adjust pot 220 aileron throw Transmitter off 28 Model Aviation George M Myers J V REF VOLTS OC COMMON GROUND come out something new year attract customers thereby stay business see scope problem order make repairs manufacturers service department will often choose simply replace item like amplifier servo Batteries replaced hint trouble theres no way fix Transmitters receivers may repaired repair obvious simple Yet some folks repair own RC systems So Step folks like buy Getting Most Radio Control Systems Fred M Marks Kalmbach Publishing Co 1027 North Seventh St Milwaukee WI 53233 1980 issue marked 12046 $895 won 5 buy book dont talk about troubles Does tell howl feel about Step two read book cover cover Skim over hard parts mark margin pencil go back re-read till understand Ill tell right now technicians handbook over view RC system got way youve finished book still wont know end soldering iron hot didnt know before will have pretty good idea whats inside pretty colored boxes lovingly call RC system will have received primary education Step three make sure have troubles can fixed According failure tree pp 60 61 Freds book 40% troubles can traced directly batteries dont fix scrap bunches have crashed need new plastic parts servos can get manu facturer think would smarter send him servo repair because youll likely get new return Transmitter receiver troubles often turn out broken wires should able fix Ditto switch harnesses battery chargers sud denly refuse charge batteries Step four make repair creating new problems Step five prove problem fixed havent left other problems unresolved means going down Freds trouble shooting tree again Fig 7-1 p 70 fundamental obvious things like testing batteries voltage capacity checking ground range making sure servos move smoothly over full range measuring system current drain Fred told chapter left out book publisher because ran out allotted pages book before ran out Freds text Guess what left out Youve got testing anyway Now does leave reader patiently waiting told put dualrate switches Regardless age make equipment after reading Freds book will have pretty good idea whether pro posed modification repair practical will also have hands schematic diagram pretty close right system preamble over going jump down inside sons Airtronics XL trans mitter install mixer offered reader Alan F Nagel dont have schematic XL know uses NE5044 chip will assume NE5044 chips alike least standpoint function pin chip built Ace RC Silver Seven trans mitter wouldnt know anything about NE5044 However read Chapter 4 ofFirst carefully disassembled enough Freds book would know enough about thetransmitter able trace wires PC NE5 044 know install mixer afterpaths switch panel under tracing out wires printed circuits theremovable cover labeled Airtronics XL channels want mixed Heres wentwas matter removing back cover some about jobContinued page 112 December 1981 29 Nagel mixer nestled beside battery Tims Airtronics XL transmitter Note cutaway flange gives access Reference pot half-hidden corner between side case bottom encoder board rear view oi in-u s MirLiuuui XL transmitter Nagel mixer occupies smiagin OT space bottom left corner next battery Two pots used offset flap control mounted adjacent flap pot top case changes basic Airtronics circuit minor reversible just case things didnt work out LEADER IN SMALL AIRFOIL TECHNOLOGY MASIER AIRSCREW JtstV 3LSWEV JSTAIg IMPROVED THROUGH FOUR YEARS OF PRODUCTION THE GIF SERIES IS UNEQUALED FOR PERFORMANCE & DURABILITY AVAILABLE WORLDWIDE THROUGH 131 DISTRIBUTORS WINDSOR PROPELLER CO WINDSOR CA 95492 PRESENTS BALSA STRIPPER 495 AT YOUR DEALER PRECISION STRIP WOOD TO Va x /s INS FROM BALSA SHEET ALSO FOR DRAFTING AND PHOTO MATS USES TYPE II BLADE SUPER TOOL T PRICE WINDSOR PROPELLER CO PO BOX 112 WINDSOR CA 95492 Super Savings GET ORGANIZEDSCALE DOCUMENTATIONFiberglass Materials Heres anetoff stordyldestttat hoIdnooRSCALE DRAWINGSPHOTOS BOOKLETSFiberglassClothSSqyards51500 4 years lavorite 8ii magazineschoice 3/, 2 4 6 oz cloth 4 MAG FILES $495titmiflating Ep oxy Resin I6hrcurelS30OOper gal PO BOX 388-K Send 5498 plus 51 OCtLiquid Mold ReleaseS3O0 16 ozs postage harrdierg toREPLA TECHEpoxy PrimerIKaRiS40OOpergat Epoxy Paint Thinner K&BIS SOOper gal DON INOtJSThiESNTERNA ONAPolyester Resin K&BIS20O0per gal DOVER NH 03820CATALOGS $200 49600 MC KENZ E HwySend check money order shtpping collect COO okay VIDA OflEGON 9749aCall write Bob Smith RIC Aircraft PO Box 33335 Oranada Hills CA 91344 1213t 3666872 indeed dutiful memoriam thingboard carefully avoid breakingfrom battery pack negative lead because Sid like friends notanythingflap control range about 27 VDC 32 us today will always present has NextbecauseTimwantedflaperonswetracedVDC voltages measured handed baton cannot drop hobbythe wires ailerons flaps controls Asused set freshly charged batteries using business have shared muchwe traced out made sketches what we20000 ohms/volt VOM resulting control Forced look back occasion wefound soon became obvious XLpulse ranges 1 00 ms 200 ms admire people like Sid because have ourcircuits fundamentally different theailerons 110 ms 190 ms flaps deep respect sum-up word integritySilver Seven circuits Freds book keptmeasured Estes Skyaligner Oct 81 true peers try live uptracing sketching until understood theMA better having known Siddifference information hand could decide like others personification reason- must very careful avoid makingwhether proceed proposed ableness knew could haveassumptions later proven trueinstallation assembled mixer piece otherwise integrity simpleIn case control voltages distributedof periboard ran some static tests words like knowing fly toon Pink Black wires would easy torevealed need offset flap control fly everything stands will readassume Pink Japanese code 5voltages mixed voltages presented about Sid testimony appears else-VDC regulated Black 0 VDC wziclzto NE5044 want Flaps Up plus Ailerons magazine feel deeply hiswould half correct As works out theNeutral equal 30 VDC two ways family intimates grateful whatPink wire connects pin 15 5 VDC regulatedto accomplish purpose way would has given us owe himand shall keepto controls 330 ohm resistorshift flap control potentiometer shaft inside memory freshbetween pin 8 Black wire aileronthe flap control lever turned out control puts Black wire 07 VDCdifficult youd expect because escutcheon Bill Winter 4330Alta Vista Dr Fairfa VAThere also 1200 ohm resistor between pin 8plate over flap lever glued place 22030and Purple wire flap control opted instead pair 5 K pots puts point 1 VDCserieswiththePinkandonewiththePurpleleads Radio Technique/Myers Since wiper control potentiometersto flap pot respectively gave us both Con finued page 29cant move about 500 its total rangeoffset control span adjustment also brought about 2700 voltages picked off thein problem back set occa screws antenna battery switch-aileron control 3 VDC measuredsionally shorted out pots changing AMAMJ MAS ENTERPRISES/ N NATIONAL CHAMPION 1979-1980SPECIALISTS IN MIKE MAProudly HeadsRC HELICOPTERS OVERSEAS /% 4toc/ tatt qotlitied tn aesmor questions ranging installing train ing gnar no flying shiy exerted SCHLUTER 1-IELI 60 Size CALL FOR OUR LOW PRICES Schlagar Helicopter Parts Stock Including Pipes Puselages Etc _______________JLOWEST PRICES WEBRAI now availableI M J WAS ENTERPRISESI DISTRIBUTORS Stock Helicopter Kits Accessories Engines S Radios Parts S Books CRICKET Cricket Parts AMERICAN R/C MANTIS NOW ONLY $11998 SS , I..t .a..n..,s... . ghh S 11 2 Modei Aviation U PO BOX 112 HEUCOPTER Bull HEAVY DUTY 4-IN SANDER Adjustable table Miter guide & extra discs available Spec $2495 Ship $ 350 r 13 7~11 Cwieg 19 eQay Iz I II 0 0 R/C GOODIES PO BOX 192 0 VAN NUYS CA 91408 SPECIAL 825 DELUXE SYSTEM Flite wt101oz 4 Ch Complete U Ath metal Tx 4 Servos cads Chgr Reg$27495 Spec $175OOu AIR CAPITALShip $ 650 ZINGER WOODReady-To-Fly 00 PROPS 6PackLess Radio Engine 7-45-6 $4 8257 Span I STDruiLPWR84-56523ShipU SERVO 3/4x 1 7/1694565 23$65040-61 Engine1 x 1-9/16 1 38104565 63 oz Deans plugll-6-7.75643 g $15995Spec $14495 I124569 65________ IReg$22 95$2500 ISpec $13 95Other Sizes Same Discounts-Ship $2 SD Ship$250MORE L CATALOG 6t $1 70 FOREIGNCALIF RESIDENTS ADD SALES TAX o hasthe complete comprehensive line RIO Soaring products toeverexist North America o Our line products includesthosefrom some respected firms Europe well complete inventory own US manufacturers O We carry complete line Kits Hardware Accessories & Building Supplies have full inventory Launching Equipment & Related Products o We serve serious R/O soaring enthusiast supplies kits other items have sought long Call write today Free product listing & price sheet Sailplane Factory717 244 4508 PO Box 341 Red Lion PA 173569am 9pm EST PS Come see displays 1982 WRAMS & TOLEDO showsin 114 Model Aviation flap setting drastically Fortunately dis covered problem ground Theres no substitute good test program dont want drag out like construction article end mixer story comes down building mixer used wire-wrap tech nique described earlier column dual mixer Ace RC Silver Seven installing between encoder board Red Green wires found pins 2 5 NE5044 respectively can likewise feel needproviding read Freds book study problem carefully test test test go will void Airtronics guarantee probably will have remove mixer put things back way should find need return set service since premise going column old set couldnt get fixed wanted fix yourself isnt much problem Just keep things legal bear mind 2nd-class commercial operators license re quired kind work RF boardor module case may reason restriction can cause off-frequency operation knowing set will seem working fine can get setting off pocket-pagers over county wiping out TV pictures have no right So remember George said Keep cottonpicking hands Out RF sectionOkay Keep letters flowing George M Myers 70 Froehlich Farm Rd Hicks yule NY 11801 1SF Tournament/Pruss Continued page 32 retrieving two winch lines about later column wasnt biggest tournament ever couple reasons timing last-minute site location among format proved will popular scheduled again should held best site ever large meet site Joliet Park Board Airport Joliet IL grass area cut organizers liking week before Joliet Park Board airport manager couldnt have cooperative site isnt considered Soaring get-together future well miss out Again pits Contestants represented over 20 states Canada team event tight contestthat second through fifth MRCS group tournament champion Ken Bates won over 2100 points second fifth separated less 700 points Ken Shaw flew 10-year-old Super Esprit second place Unlimited Best speed times 104 109 both Alex Bower 100-point bonusin outlanding zone drew lot criticism changed expertsmany expertsmissed 25-meterdiameter circle Gordon Pearson Warren Tiahrt should quit IBM Chrysler co-MC banquets missed great Postscript tournaments sponsors since first 1970 has Top Flite specifically Sid Axelrod Back 1970 LSF waiting its 100th member Sid sponsoring tournament continued right up 12th 1981 Looking Hard Find Soaring Goodies JA c3a4fane Jaclory
Edition: Model Aviation - 1981/12
Page Numbers: 28, 29, 112, 114
echniquc Dear George / know little about electronics have access some pretty good equipment Id like some work radio make work add mixer dual rates exponential etc cant because dont have schematics manufacturer can tor won t suppl V Can help S Devoted Reader FIXING OLD RADIOS month brings another letter like Sometimes very rarely can lay hands necessary schematics Most often have tell reader what Im about tell too manufacturers too variations systems offered anyone keep up Changes continuous evolutionary batch servos new transmitter series change anything causes minor changes someplace Inte grated circuits make changes invisible cant see what masks changed figure out volatile hobby Someone gets bright idea makes few prototypes commits production whatever lot size prudence dictates wallet can afford units get reviewed reviewers find problems producer never anticipated Changes made units resubmitted review Eventually pass reviewers tests field reports start coming changes Production continues knows cycle unit built its time next lot go production costs have risen someone has come out cheaper better compo nent keep price constant still leave profit minor changes made accommodate new item Changes accumulate way until next revolutionary change necessary like get new frequencies big production run hobby 5000 units can see problem Add need NA GEL MFXER FOR AIRTRONICS XL A22K ATTENUATOR IL~I RED50K tvVVV4j2NI 3 AILERON AMP/IN VERTER AILERONFLAP AM WIN VERTER TO ENCODER PINS TO PIN 2 -FT BALANCEIAJ 0 z TO PINS G/W AILERONFLAP AMP/ INVERTER AMP/INVERTER__ MIXER PINS IN K BLAC11 INITIAL ADJUSTMENTS 1 Switch independent Turn transmitter 2 Check & F servos normal responses Set both reversing switches normal transmitter off 3 Set & B attenuators balance reference middle position Transmitter Set e 30 VDC transmitter off 4 Switch output mixers transmitter 5 Check & F servos Both should respond to F inputs Transmitter off 6 Switch Pin 2 reverser Transmitter servo should operate reverse 7 Moving flap control full range should make both servos rotate 450 adjust balance til both move equally adjust F attenuator 450 B Adjust pot 220 aileron throw Transmitter off 28 Model Aviation George M Myers J V REF VOLTS OC COMMON GROUND come out something new year attract customers thereby stay business see scope problem order make repairs manufacturers service department will often choose simply replace item like amplifier servo Batteries replaced hint trouble theres no way fix Transmitters receivers may repaired repair obvious simple Yet some folks repair own RC systems So Step folks like buy Getting Most Radio Control Systems Fred M Marks Kalmbach Publishing Co 1027 North Seventh St Milwaukee WI 53233 1980 issue marked 12046 $895 won 5 buy book dont talk about troubles Does tell howl feel about Step two read book cover cover Skim over hard parts mark margin pencil go back re-read till understand Ill tell right now technicians handbook over view RC system got way youve finished book still wont know end soldering iron hot didnt know before will have pretty good idea whats inside pretty colored boxes lovingly call RC system will have received primary education Step three make sure have troubles can fixed According failure tree pp 60 61 Freds book 40% troubles can traced directly batteries dont fix scrap bunches have crashed need new plastic parts servos can get manu facturer think would smarter send him servo repair because youll likely get new return Transmitter receiver troubles often turn out broken wires should able fix Ditto switch harnesses battery chargers sud denly refuse charge batteries Step four make repair creating new problems Step five prove problem fixed havent left other problems unresolved means going down Freds trouble shooting tree again Fig 7-1 p 70 fundamental obvious things like testing batteries voltage capacity checking ground range making sure servos move smoothly over full range measuring system current drain Fred told chapter left out book publisher because ran out allotted pages book before ran out Freds text Guess what left out Youve got testing anyway Now does leave reader patiently waiting told put dualrate switches Regardless age make equipment after reading Freds book will have pretty good idea whether pro posed modification repair practical will also have hands schematic diagram pretty close right system preamble over going jump down inside sons Airtronics XL trans mitter install mixer offered reader Alan F Nagel dont have schematic XL know uses NE5044 chip will assume NE5044 chips alike least standpoint function pin chip built Ace RC Silver Seven trans mitter wouldnt know anything about NE5044 However read Chapter 4 ofFirst carefully disassembled enough Freds book would know enough about thetransmitter able trace wires PC NE5 044 know install mixer afterpaths switch panel under tracing out wires printed circuits theremovable cover labeled Airtronics XL channels want mixed Heres wentwas matter removing back cover some about jobContinued page 112 December 1981 29 Nagel mixer nestled beside battery Tims Airtronics XL transmitter Note cutaway flange gives access Reference pot half-hidden corner between side case bottom encoder board rear view oi in-u s MirLiuuui XL transmitter Nagel mixer occupies smiagin OT space bottom left corner next battery Two pots used offset flap control mounted adjacent flap pot top case changes basic Airtronics circuit minor reversible just case things didnt work out LEADER IN SMALL AIRFOIL TECHNOLOGY MASIER AIRSCREW JtstV 3LSWEV JSTAIg IMPROVED THROUGH FOUR YEARS OF PRODUCTION THE GIF SERIES IS UNEQUALED FOR PERFORMANCE & DURABILITY AVAILABLE WORLDWIDE THROUGH 131 DISTRIBUTORS WINDSOR PROPELLER CO WINDSOR CA 95492 PRESENTS BALSA STRIPPER 495 AT YOUR DEALER PRECISION STRIP WOOD TO Va x /s INS FROM BALSA SHEET ALSO FOR DRAFTING AND PHOTO MATS USES TYPE II BLADE SUPER TOOL T PRICE WINDSOR PROPELLER CO PO BOX 112 WINDSOR CA 95492 Super Savings GET ORGANIZEDSCALE DOCUMENTATIONFiberglass Materials Heres anetoff stordyldestttat hoIdnooRSCALE DRAWINGSPHOTOS BOOKLETSFiberglassClothSSqyards51500 4 years lavorite 8ii magazineschoice 3/, 2 4 6 oz cloth 4 MAG FILES $495titmiflating Ep oxy Resin I6hrcurelS30OOper gal PO BOX 388-K Send 5498 plus 51 OCtLiquid Mold ReleaseS3O0 16 ozs postage harrdierg toREPLA TECHEpoxy PrimerIKaRiS40OOpergat Epoxy Paint Thinner K&BIS SOOper gal DON INOtJSThiESNTERNA ONAPolyester Resin K&BIS20O0per gal DOVER NH 03820CATALOGS $200 49600 MC KENZ E HwySend check money order shtpping collect COO okay VIDA OflEGON 9749aCall write Bob Smith RIC Aircraft PO Box 33335 Oranada Hills CA 91344 1213t 3666872 indeed dutiful memoriam thingboard carefully avoid breakingfrom battery pack negative lead because Sid like friends notanythingflap control range about 27 VDC 32 us today will always present has NextbecauseTimwantedflaperonswetracedVDC voltages measured handed baton cannot drop hobbythe wires ailerons flaps controls Asused set freshly charged batteries using business have shared muchwe traced out made sketches what we20000 ohms/volt VOM resulting control Forced look back occasion wefound soon became obvious XLpulse ranges 1 00 ms 200 ms admire people like Sid because have ourcircuits fundamentally different theailerons 110 ms 190 ms flaps deep respect sum-up word integritySilver Seven circuits Freds book keptmeasured Estes Skyaligner Oct 81 true peers try live uptracing sketching until understood theMA better having known Siddifference information hand could decide like others personification reason- must very careful avoid makingwhether proceed proposed ableness knew could haveassumptions later proven trueinstallation assembled mixer piece otherwise integrity simpleIn case control voltages distributedof periboard ran some static tests words like knowing fly toon Pink Black wires would easy torevealed need offset flap control fly everything stands will readassume Pink Japanese code 5voltages mixed voltages presented about Sid testimony appears else-VDC regulated Black 0 VDC wziclzto NE5044 want Flaps Up plus Ailerons magazine feel deeply hiswould half correct As works out theNeutral equal 30 VDC two ways family intimates grateful whatPink wire connects pin 15 5 VDC regulatedto accomplish purpose way would has given us owe himand shall keepto controls 330 ohm resistorshift flap control potentiometer shaft inside memory freshbetween pin 8 Black wire aileronthe flap control lever turned out control puts Black wire 07 VDCdifficult youd expect because escutcheon Bill Winter 4330Alta Vista Dr Fairfa VAThere also 1200 ohm resistor between pin 8plate over flap lever glued place 22030and Purple wire flap control opted instead pair 5 K pots puts point 1 VDCserieswiththePinkandonewiththePurpleleads Radio Technique/Myers Since wiper control potentiometersto flap pot respectively gave us both Con finued page 29cant move about 500 its total rangeoffset control span adjustment also brought about 2700 voltages picked off thein problem back set occa screws antenna battery switch-aileron control 3 VDC measuredsionally shorted out pots changing AMAMJ MAS ENTERPRISES/ N NATIONAL CHAMPION 1979-1980SPECIALISTS IN MIKE MAProudly HeadsRC HELICOPTERS OVERSEAS /% 4toc/ tatt qotlitied tn aesmor questions ranging installing train ing gnar no flying shiy exerted SCHLUTER 1-IELI 60 Size CALL FOR OUR LOW PRICES Schlagar Helicopter Parts Stock Including Pipes Puselages Etc _______________JLOWEST PRICES WEBRAI now availableI M J WAS ENTERPRISESI DISTRIBUTORS Stock Helicopter Kits Accessories Engines S Radios Parts S Books CRICKET Cricket Parts AMERICAN R/C MANTIS NOW ONLY $11998 SS , I..t .a..n..,s... . ghh S 11 2 Modei Aviation U PO BOX 112 HEUCOPTER Bull HEAVY DUTY 4-IN SANDER Adjustable table Miter guide & extra discs available Spec $2495 Ship $ 350 r 13 7~11 Cwieg 19 eQay Iz I II 0 0 R/C GOODIES PO BOX 192 0 VAN NUYS CA 91408 SPECIAL 825 DELUXE SYSTEM Flite wt101oz 4 Ch Complete U Ath metal Tx 4 Servos cads Chgr Reg$27495 Spec $175OOu AIR CAPITALShip $ 650 ZINGER WOODReady-To-Fly 00 PROPS 6PackLess Radio Engine 7-45-6 $4 8257 Span I STDruiLPWR84-56523ShipU SERVO 3/4x 1 7/1694565 23$65040-61 Engine1 x 1-9/16 1 38104565 63 oz Deans plugll-6-7.75643 g $15995Spec $14495 I124569 65________ IReg$22 95$2500 ISpec $13 95Other Sizes Same Discounts-Ship $2 SD Ship$250MORE L CATALOG 6t $1 70 FOREIGNCALIF RESIDENTS ADD SALES TAX o hasthe complete comprehensive line RIO Soaring products toeverexist North America o Our line products includesthosefrom some respected firms Europe well complete inventory own US manufacturers O We carry complete line Kits Hardware Accessories & Building Supplies have full inventory Launching Equipment & Related Products o We serve serious R/O soaring enthusiast supplies kits other items have sought long Call write today Free product listing & price sheet Sailplane Factory717 244 4508 PO Box 341 Red Lion PA 173569am 9pm EST PS Come see displays 1982 WRAMS & TOLEDO showsin 114 Model Aviation flap setting drastically Fortunately dis covered problem ground Theres no substitute good test program dont want drag out like construction article end mixer story comes down building mixer used wire-wrap tech nique described earlier column dual mixer Ace RC Silver Seven installing between encoder board Red Green wires found pins 2 5 NE5044 respectively can likewise feel needproviding read Freds book study problem carefully test test test go will void Airtronics guarantee probably will have remove mixer put things back way should find need return set service since premise going column old set couldnt get fixed wanted fix yourself isnt much problem Just keep things legal bear mind 2nd-class commercial operators license re quired kind work RF boardor module case may reason restriction can cause off-frequency operation knowing set will seem working fine can get setting off pocket-pagers over county wiping out TV pictures have no right So remember George said Keep cottonpicking hands Out RF sectionOkay Keep letters flowing George M Myers 70 Froehlich Farm Rd Hicks yule NY 11801 1SF Tournament/Pruss Continued page 32 retrieving two winch lines about later column wasnt biggest tournament ever couple reasons timing last-minute site location among format proved will popular scheduled again should held best site ever large meet site Joliet Park Board Airport Joliet IL grass area cut organizers liking week before Joliet Park Board airport manager couldnt have cooperative site isnt considered Soaring get-together future well miss out Again pits Contestants represented over 20 states Canada team event tight contestthat second through fifth MRCS group tournament champion Ken Bates won over 2100 points second fifth separated less 700 points Ken Shaw flew 10-year-old Super Esprit second place Unlimited Best speed times 104 109 both Alex Bower 100-point bonusin outlanding zone drew lot criticism changed expertsmany expertsmissed 25-meterdiameter circle Gordon Pearson Warren Tiahrt should quit IBM Chrysler co-MC banquets missed great Postscript tournaments sponsors since first 1970 has Top Flite specifically Sid Axelrod Back 1970 LSF waiting its 100th member Sid sponsoring tournament continued right up 12th 1981 Looking Hard Find Soaring Goodies JA c3a4fane Jaclory
Edition: Model Aviation - 1981/12
Page Numbers: 28, 29, 112, 114
echniquc Dear George / know little about electronics have access some pretty good equipment Id like some work radio make work add mixer dual rates exponential etc cant because dont have schematics manufacturer can tor won t suppl V Can help S Devoted Reader FIXING OLD RADIOS month brings another letter like Sometimes very rarely can lay hands necessary schematics Most often have tell reader what Im about tell too manufacturers too variations systems offered anyone keep up Changes continuous evolutionary batch servos new transmitter series change anything causes minor changes someplace Inte grated circuits make changes invisible cant see what masks changed figure out volatile hobby Someone gets bright idea makes few prototypes commits production whatever lot size prudence dictates wallet can afford units get reviewed reviewers find problems producer never anticipated Changes made units resubmitted review Eventually pass reviewers tests field reports start coming changes Production continues knows cycle unit built its time next lot go production costs have risen someone has come out cheaper better compo nent keep price constant still leave profit minor changes made accommodate new item Changes accumulate way until next revolutionary change necessary like get new frequencies big production run hobby 5000 units can see problem Add need NA GEL MFXER FOR AIRTRONICS XL A22K ATTENUATOR IL~I RED50K tvVVV4j2NI 3 AILERON AMP/IN VERTER AILERONFLAP AM WIN VERTER TO ENCODER PINS TO PIN 2 -FT BALANCEIAJ 0 z TO PINS G/W AILERONFLAP AMP/ INVERTER AMP/INVERTER__ MIXER PINS IN K BLAC11 INITIAL ADJUSTMENTS 1 Switch independent Turn transmitter 2 Check & F servos normal responses Set both reversing switches normal transmitter off 3 Set & B attenuators balance reference middle position Transmitter Set e 30 VDC transmitter off 4 Switch output mixers transmitter 5 Check & F servos Both should respond to F inputs Transmitter off 6 Switch Pin 2 reverser Transmitter servo should operate reverse 7 Moving flap control full range should make both servos rotate 450 adjust balance til both move equally adjust F attenuator 450 B Adjust pot 220 aileron throw Transmitter off 28 Model Aviation George M Myers J V REF VOLTS OC COMMON GROUND come out something new year attract customers thereby stay business see scope problem order make repairs manufacturers service department will often choose simply replace item like amplifier servo Batteries replaced hint trouble theres no way fix Transmitters receivers may repaired repair obvious simple Yet some folks repair own RC systems So Step folks like buy Getting Most Radio Control Systems Fred M Marks Kalmbach Publishing Co 1027 North Seventh St Milwaukee WI 53233 1980 issue marked 12046 $895 won 5 buy book dont talk about troubles Does tell howl feel about Step two read book cover cover Skim over hard parts mark margin pencil go back re-read till understand Ill tell right now technicians handbook over view RC system got way youve finished book still wont know end soldering iron hot didnt know before will have pretty good idea whats inside pretty colored boxes lovingly call RC system will have received primary education Step three make sure have troubles can fixed According failure tree pp 60 61 Freds book 40% troubles can traced directly batteries dont fix scrap bunches have crashed need new plastic parts servos can get manu facturer think would smarter send him servo repair because youll likely get new return Transmitter receiver troubles often turn out broken wires should able fix Ditto switch harnesses battery chargers sud denly refuse charge batteries Step four make repair creating new problems Step five prove problem fixed havent left other problems unresolved means going down Freds trouble shooting tree again Fig 7-1 p 70 fundamental obvious things like testing batteries voltage capacity checking ground range making sure servos move smoothly over full range measuring system current drain Fred told chapter left out book publisher because ran out allotted pages book before ran out Freds text Guess what left out Youve got testing anyway Now does leave reader patiently waiting told put dualrate switches Regardless age make equipment after reading Freds book will have pretty good idea whether pro posed modification repair practical will also have hands schematic diagram pretty close right system preamble over going jump down inside sons Airtronics XL trans mitter install mixer offered reader Alan F Nagel dont have schematic XL know uses NE5044 chip will assume NE5044 chips alike least standpoint function pin chip built Ace RC Silver Seven trans mitter wouldnt know anything about NE5044 However read Chapter 4 ofFirst carefully disassembled enough Freds book would know enough about thetransmitter able trace wires PC NE5 044 know install mixer afterpaths switch panel under tracing out wires printed circuits theremovable cover labeled Airtronics XL channels want mixed Heres wentwas matter removing back cover some about jobContinued page 112 December 1981 29 Nagel mixer nestled beside battery Tims Airtronics XL transmitter Note cutaway flange gives access Reference pot half-hidden corner between side case bottom encoder board rear view oi in-u s MirLiuuui XL transmitter Nagel mixer occupies smiagin OT space bottom left corner next battery Two pots used offset flap control mounted adjacent flap pot top case changes basic Airtronics circuit minor reversible just case things didnt work out LEADER IN SMALL AIRFOIL TECHNOLOGY MASIER AIRSCREW JtstV 3LSWEV JSTAIg IMPROVED THROUGH FOUR YEARS OF PRODUCTION THE GIF SERIES IS UNEQUALED FOR PERFORMANCE & DURABILITY AVAILABLE WORLDWIDE THROUGH 131 DISTRIBUTORS WINDSOR PROPELLER CO WINDSOR CA 95492 PRESENTS BALSA STRIPPER 495 AT YOUR DEALER PRECISION STRIP WOOD TO Va x /s INS FROM BALSA SHEET ALSO FOR DRAFTING AND PHOTO MATS USES TYPE II BLADE SUPER TOOL T PRICE WINDSOR PROPELLER CO PO BOX 112 WINDSOR CA 95492 Super Savings GET ORGANIZEDSCALE DOCUMENTATIONFiberglass Materials Heres anetoff stordyldestttat hoIdnooRSCALE DRAWINGSPHOTOS BOOKLETSFiberglassClothSSqyards51500 4 years lavorite 8ii magazineschoice 3/, 2 4 6 oz cloth 4 MAG FILES $495titmiflating Ep oxy Resin I6hrcurelS30OOper gal PO BOX 388-K Send 5498 plus 51 OCtLiquid Mold ReleaseS3O0 16 ozs postage harrdierg toREPLA TECHEpoxy PrimerIKaRiS40OOpergat Epoxy Paint Thinner K&BIS SOOper gal DON INOtJSThiESNTERNA ONAPolyester Resin K&BIS20O0per gal DOVER NH 03820CATALOGS $200 49600 MC KENZ E HwySend check money order shtpping collect COO okay VIDA OflEGON 9749aCall write Bob Smith RIC Aircraft PO Box 33335 Oranada Hills CA 91344 1213t 3666872 indeed dutiful memoriam thingboard carefully avoid breakingfrom battery pack negative lead because Sid like friends notanythingflap control range about 27 VDC 32 us today will always present has NextbecauseTimwantedflaperonswetracedVDC voltages measured handed baton cannot drop hobbythe wires ailerons flaps controls Asused set freshly charged batteries using business have shared muchwe traced out made sketches what we20000 ohms/volt VOM resulting control Forced look back occasion wefound soon became obvious XLpulse ranges 1 00 ms 200 ms admire people like Sid because have ourcircuits fundamentally different theailerons 110 ms 190 ms flaps deep respect sum-up word integritySilver Seven circuits Freds book keptmeasured Estes Skyaligner Oct 81 true peers try live uptracing sketching until understood theMA better having known Siddifference information hand could decide like others personification reason- must very careful avoid makingwhether proceed proposed ableness knew could haveassumptions later proven trueinstallation assembled mixer piece otherwise integrity simpleIn case control voltages distributedof periboard ran some static tests words like knowing fly toon Pink Black wires would easy torevealed need offset flap control fly everything stands will readassume Pink Japanese code 5voltages mixed voltages presented about Sid testimony appears else-VDC regulated Black 0 VDC wziclzto NE5044 want Flaps Up plus Ailerons magazine feel deeply hiswould half correct As works out theNeutral equal 30 VDC two ways family intimates grateful whatPink wire connects pin 15 5 VDC regulatedto accomplish purpose way would has given us owe himand shall keepto controls 330 ohm resistorshift flap control potentiometer shaft inside memory freshbetween pin 8 Black wire aileronthe flap control lever turned out control puts Black wire 07 VDCdifficult youd expect because escutcheon Bill Winter 4330Alta Vista Dr Fairfa VAThere also 1200 ohm resistor between pin 8plate over flap lever glued place 22030and Purple wire flap control opted instead pair 5 K pots puts point 1 VDCserieswiththePinkandonewiththePurpleleads Radio Technique/Myers Since wiper control potentiometersto flap pot respectively gave us both Con finued page 29cant move about 500 its total rangeoffset control span adjustment also brought about 2700 voltages picked off thein problem back set occa screws antenna battery switch-aileron control 3 VDC measuredsionally shorted out pots changing AMAMJ MAS ENTERPRISES/ N NATIONAL CHAMPION 1979-1980SPECIALISTS IN MIKE MAProudly HeadsRC HELICOPTERS OVERSEAS /% 4toc/ tatt qotlitied tn aesmor questions ranging installing train ing gnar no flying shiy exerted SCHLUTER 1-IELI 60 Size CALL FOR OUR LOW PRICES Schlagar Helicopter Parts Stock Including Pipes Puselages Etc _______________JLOWEST PRICES WEBRAI now availableI M J WAS ENTERPRISESI DISTRIBUTORS Stock Helicopter Kits Accessories Engines S Radios Parts S Books CRICKET Cricket Parts AMERICAN R/C MANTIS NOW ONLY $11998 SS , I..t .a..n..,s... . ghh S 11 2 Modei Aviation U PO BOX 112 HEUCOPTER Bull HEAVY DUTY 4-IN SANDER Adjustable table Miter guide & extra discs available Spec $2495 Ship $ 350 r 13 7~11 Cwieg 19 eQay Iz I II 0 0 R/C GOODIES PO BOX 192 0 VAN NUYS CA 91408 SPECIAL 825 DELUXE SYSTEM Flite wt101oz 4 Ch Complete U Ath metal Tx 4 Servos cads Chgr Reg$27495 Spec $175OOu AIR CAPITALShip $ 650 ZINGER WOODReady-To-Fly 00 PROPS 6PackLess Radio Engine 7-45-6 $4 8257 Span I STDruiLPWR84-56523ShipU SERVO 3/4x 1 7/1694565 23$65040-61 Engine1 x 1-9/16 1 38104565 63 oz Deans plugll-6-7.75643 g $15995Spec $14495 I124569 65________ IReg$22 95$2500 ISpec $13 95Other Sizes Same Discounts-Ship $2 SD Ship$250MORE L CATALOG 6t $1 70 FOREIGNCALIF RESIDENTS ADD SALES TAX o hasthe complete comprehensive line RIO Soaring products toeverexist North America o Our line products includesthosefrom some respected firms Europe well complete inventory own US manufacturers O We carry complete line Kits Hardware Accessories & Building Supplies have full inventory Launching Equipment & Related Products o We serve serious R/O soaring enthusiast supplies kits other items have sought long Call write today Free product listing & price sheet Sailplane Factory717 244 4508 PO Box 341 Red Lion PA 173569am 9pm EST PS Come see displays 1982 WRAMS & TOLEDO showsin 114 Model Aviation flap setting drastically Fortunately dis covered problem ground Theres no substitute good test program dont want drag out like construction article end mixer story comes down building mixer used wire-wrap tech nique described earlier column dual mixer Ace RC Silver Seven installing between encoder board Red Green wires found pins 2 5 NE5044 respectively can likewise feel needproviding read Freds book study problem carefully test test test go will void Airtronics guarantee probably will have remove mixer put things back way should find need return set service since premise going column old set couldnt get fixed wanted fix yourself isnt much problem Just keep things legal bear mind 2nd-class commercial operators license re quired kind work RF boardor module case may reason restriction can cause off-frequency operation knowing set will seem working fine can get setting off pocket-pagers over county wiping out TV pictures have no right So remember George said Keep cottonpicking hands Out RF sectionOkay Keep letters flowing George M Myers 70 Froehlich Farm Rd Hicks yule NY 11801 1SF Tournament/Pruss Continued page 32 retrieving two winch lines about later column wasnt biggest tournament ever couple reasons timing last-minute site location among format proved will popular scheduled again should held best site ever large meet site Joliet Park Board Airport Joliet IL grass area cut organizers liking week before Joliet Park Board airport manager couldnt have cooperative site isnt considered Soaring get-together future well miss out Again pits Contestants represented over 20 states Canada team event tight contestthat second through fifth MRCS group tournament champion Ken Bates won over 2100 points second fifth separated less 700 points Ken Shaw flew 10-year-old Super Esprit second place Unlimited Best speed times 104 109 both Alex Bower 100-point bonusin outlanding zone drew lot criticism changed expertsmany expertsmissed 25-meterdiameter circle Gordon Pearson Warren Tiahrt should quit IBM Chrysler co-MC banquets missed great Postscript tournaments sponsors since first 1970 has Top Flite specifically Sid Axelrod Back 1970 LSF waiting its 100th member Sid sponsoring tournament continued right up 12th 1981 Looking Hard Find Soaring Goodies JA c3a4fane Jaclory
Edition: Model Aviation - 1981/12
Page Numbers: 28, 29, 112, 114
echniquc Dear George / know little about electronics have access some pretty good equipment Id like some work radio make work add mixer dual rates exponential etc cant because dont have schematics manufacturer can tor won t suppl V Can help S Devoted Reader FIXING OLD RADIOS month brings another letter like Sometimes very rarely can lay hands necessary schematics Most often have tell reader what Im about tell too manufacturers too variations systems offered anyone keep up Changes continuous evolutionary batch servos new transmitter series change anything causes minor changes someplace Inte grated circuits make changes invisible cant see what masks changed figure out volatile hobby Someone gets bright idea makes few prototypes commits production whatever lot size prudence dictates wallet can afford units get reviewed reviewers find problems producer never anticipated Changes made units resubmitted review Eventually pass reviewers tests field reports start coming changes Production continues knows cycle unit built its time next lot go production costs have risen someone has come out cheaper better compo nent keep price constant still leave profit minor changes made accommodate new item Changes accumulate way until next revolutionary change necessary like get new frequencies big production run hobby 5000 units can see problem Add need NA GEL MFXER FOR AIRTRONICS XL A22K ATTENUATOR IL~I RED50K tvVVV4j2NI 3 AILERON AMP/IN VERTER AILERONFLAP AM WIN VERTER TO ENCODER PINS TO PIN 2 -FT BALANCEIAJ 0 z TO PINS G/W AILERONFLAP AMP/ INVERTER AMP/INVERTER__ MIXER PINS IN K BLAC11 INITIAL ADJUSTMENTS 1 Switch independent Turn transmitter 2 Check & F servos normal responses Set both reversing switches normal transmitter off 3 Set & B attenuators balance reference middle position Transmitter Set e 30 VDC transmitter off 4 Switch output mixers transmitter 5 Check & F servos Both should respond to F inputs Transmitter off 6 Switch Pin 2 reverser Transmitter servo should operate reverse 7 Moving flap control full range should make both servos rotate 450 adjust balance til both move equally adjust F attenuator 450 B Adjust pot 220 aileron throw Transmitter off 28 Model Aviation George M Myers J V REF VOLTS OC COMMON GROUND come out something new year attract customers thereby stay business see scope problem order make repairs manufacturers service department will often choose simply replace item like amplifier servo Batteries replaced hint trouble theres no way fix Transmitters receivers may repaired repair obvious simple Yet some folks repair own RC systems So Step folks like buy Getting Most Radio Control Systems Fred M Marks Kalmbach Publishing Co 1027 North Seventh St Milwaukee WI 53233 1980 issue marked 12046 $895 won 5 buy book dont talk about troubles Does tell howl feel about Step two read book cover cover Skim over hard parts mark margin pencil go back re-read till understand Ill tell right now technicians handbook over view RC system got way youve finished book still wont know end soldering iron hot didnt know before will have pretty good idea whats inside pretty colored boxes lovingly call RC system will have received primary education Step three make sure have troubles can fixed According failure tree pp 60 61 Freds book 40% troubles can traced directly batteries dont fix scrap bunches have crashed need new plastic parts servos can get manu facturer think would smarter send him servo repair because youll likely get new return Transmitter receiver troubles often turn out broken wires should able fix Ditto switch harnesses battery chargers sud denly refuse charge batteries Step four make repair creating new problems Step five prove problem fixed havent left other problems unresolved means going down Freds trouble shooting tree again Fig 7-1 p 70 fundamental obvious things like testing batteries voltage capacity checking ground range making sure servos move smoothly over full range measuring system current drain Fred told chapter left out book publisher because ran out allotted pages book before ran out Freds text Guess what left out Youve got testing anyway Now does leave reader patiently waiting told put dualrate switches Regardless age make equipment after reading Freds book will have pretty good idea whether pro posed modification repair practical will also have hands schematic diagram pretty close right system preamble over going jump down inside sons Airtronics XL trans mitter install mixer offered reader Alan F Nagel dont have schematic XL know uses NE5044 chip will assume NE5044 chips alike least standpoint function pin chip built Ace RC Silver Seven trans mitter wouldnt know anything about NE5044 However read Chapter 4 ofFirst carefully disassembled enough Freds book would know enough about thetransmitter able trace wires PC NE5 044 know install mixer afterpaths switch panel under tracing out wires printed circuits theremovable cover labeled Airtronics XL channels want mixed Heres wentwas matter removing back cover some about jobContinued page 112 December 1981 29 Nagel mixer nestled beside battery Tims Airtronics XL transmitter Note cutaway flange gives access Reference pot half-hidden corner between side case bottom encoder board rear view oi in-u s MirLiuuui XL transmitter Nagel mixer occupies smiagin OT space bottom left corner next battery Two pots used offset flap control mounted adjacent flap pot top case changes basic Airtronics circuit minor reversible just case things didnt work out LEADER IN SMALL AIRFOIL TECHNOLOGY MASIER AIRSCREW JtstV 3LSWEV JSTAIg IMPROVED THROUGH FOUR YEARS OF PRODUCTION THE GIF SERIES IS UNEQUALED FOR PERFORMANCE & DURABILITY AVAILABLE WORLDWIDE THROUGH 131 DISTRIBUTORS WINDSOR PROPELLER CO WINDSOR CA 95492 PRESENTS BALSA STRIPPER 495 AT YOUR DEALER PRECISION STRIP WOOD TO Va x /s INS FROM BALSA SHEET ALSO FOR DRAFTING AND PHOTO MATS USES TYPE II BLADE SUPER TOOL T PRICE WINDSOR PROPELLER CO PO BOX 112 WINDSOR CA 95492 Super Savings GET ORGANIZEDSCALE DOCUMENTATIONFiberglass Materials Heres anetoff stordyldestttat hoIdnooRSCALE DRAWINGSPHOTOS BOOKLETSFiberglassClothSSqyards51500 4 years lavorite 8ii magazineschoice 3/, 2 4 6 oz cloth 4 MAG FILES $495titmiflating Ep oxy Resin I6hrcurelS30OOper gal PO BOX 388-K Send 5498 plus 51 OCtLiquid Mold ReleaseS3O0 16 ozs postage harrdierg toREPLA TECHEpoxy PrimerIKaRiS40OOpergat Epoxy Paint Thinner K&BIS SOOper gal DON INOtJSThiESNTERNA ONAPolyester Resin K&BIS20O0per gal DOVER NH 03820CATALOGS $200 49600 MC KENZ E HwySend check money order shtpping collect COO okay VIDA OflEGON 9749aCall write Bob Smith RIC Aircraft PO Box 33335 Oranada Hills CA 91344 1213t 3666872 indeed dutiful memoriam thingboard carefully avoid breakingfrom battery pack negative lead because Sid like friends notanythingflap control range about 27 VDC 32 us today will always present has NextbecauseTimwantedflaperonswetracedVDC voltages measured handed baton cannot drop hobbythe wires ailerons flaps controls Asused set freshly charged batteries using business have shared muchwe traced out made sketches what we20000 ohms/volt VOM resulting control Forced look back occasion wefound soon became obvious XLpulse ranges 1 00 ms 200 ms admire people like Sid because have ourcircuits fundamentally different theailerons 110 ms 190 ms flaps deep respect sum-up word integritySilver Seven circuits Freds book keptmeasured Estes Skyaligner Oct 81 true peers try live uptracing sketching until understood theMA better having known Siddifference information hand could decide like others personification reason- must very careful avoid makingwhether proceed proposed ableness knew could haveassumptions later proven trueinstallation assembled mixer piece otherwise integrity simpleIn case control voltages distributedof periboard ran some static tests words like knowing fly toon Pink Black wires would easy torevealed need offset flap control fly everything stands will readassume Pink Japanese code 5voltages mixed voltages presented about Sid testimony appears else-VDC regulated Black 0 VDC wziclzto NE5044 want Flaps Up plus Ailerons magazine feel deeply hiswould half correct As works out theNeutral equal 30 VDC two ways family intimates grateful whatPink wire connects pin 15 5 VDC regulatedto accomplish purpose way would has given us owe himand shall keepto controls 330 ohm resistorshift flap control potentiometer shaft inside memory freshbetween pin 8 Black wire aileronthe flap control lever turned out control puts Black wire 07 VDCdifficult youd expect because escutcheon Bill Winter 4330Alta Vista Dr Fairfa VAThere also 1200 ohm resistor between pin 8plate over flap lever glued place 22030and Purple wire flap control opted instead pair 5 K pots puts point 1 VDCserieswiththePinkandonewiththePurpleleads Radio Technique/Myers Since wiper control potentiometersto flap pot respectively gave us both Con finued page 29cant move about 500 its total rangeoffset control span adjustment also brought about 2700 voltages picked off thein problem back set occa screws antenna battery switch-aileron control 3 VDC measuredsionally shorted out pots changing AMAMJ MAS ENTERPRISES/ N NATIONAL CHAMPION 1979-1980SPECIALISTS IN MIKE MAProudly HeadsRC HELICOPTERS OVERSEAS /% 4toc/ tatt qotlitied tn aesmor questions ranging installing train ing gnar no flying shiy exerted SCHLUTER 1-IELI 60 Size CALL FOR OUR LOW PRICES Schlagar Helicopter Parts Stock Including Pipes Puselages Etc _______________JLOWEST PRICES WEBRAI now availableI M J WAS ENTERPRISESI DISTRIBUTORS Stock Helicopter Kits Accessories Engines S Radios Parts S Books CRICKET Cricket Parts AMERICAN R/C MANTIS NOW ONLY $11998 SS , I..t .a..n..,s... . ghh S 11 2 Modei Aviation U PO BOX 112 HEUCOPTER Bull HEAVY DUTY 4-IN SANDER Adjustable table Miter guide & extra discs available Spec $2495 Ship $ 350 r 13 7~11 Cwieg 19 eQay Iz I II 0 0 R/C GOODIES PO BOX 192 0 VAN NUYS CA 91408 SPECIAL 825 DELUXE SYSTEM Flite wt101oz 4 Ch Complete U Ath metal Tx 4 Servos cads Chgr Reg$27495 Spec $175OOu AIR CAPITALShip $ 650 ZINGER WOODReady-To-Fly 00 PROPS 6PackLess Radio Engine 7-45-6 $4 8257 Span I STDruiLPWR84-56523ShipU SERVO 3/4x 1 7/1694565 23$65040-61 Engine1 x 1-9/16 1 38104565 63 oz Deans plugll-6-7.75643 g $15995Spec $14495 I124569 65________ IReg$22 95$2500 ISpec $13 95Other Sizes Same Discounts-Ship $2 SD Ship$250MORE L CATALOG 6t $1 70 FOREIGNCALIF RESIDENTS ADD SALES TAX o hasthe complete comprehensive line RIO Soaring products toeverexist North America o Our line products includesthosefrom some respected firms Europe well complete inventory own US manufacturers O We carry complete line Kits Hardware Accessories & Building Supplies have full inventory Launching Equipment & Related Products o We serve serious R/O soaring enthusiast supplies kits other items have sought long Call write today Free product listing & price sheet Sailplane Factory717 244 4508 PO Box 341 Red Lion PA 173569am 9pm EST PS Come see displays 1982 WRAMS & TOLEDO showsin 114 Model Aviation flap setting drastically Fortunately dis covered problem ground Theres no substitute good test program dont want drag out like construction article end mixer story comes down building mixer used wire-wrap tech nique described earlier column dual mixer Ace RC Silver Seven installing between encoder board Red Green wires found pins 2 5 NE5044 respectively can likewise feel needproviding read Freds book study problem carefully test test test go will void Airtronics guarantee probably will have remove mixer put things back way should find need return set service since premise going column old set couldnt get fixed wanted fix yourself isnt much problem Just keep things legal bear mind 2nd-class commercial operators license re quired kind work RF boardor module case may reason restriction can cause off-frequency operation knowing set will seem working fine can get setting off pocket-pagers over county wiping out TV pictures have no right So remember George said Keep cottonpicking hands Out RF sectionOkay Keep letters flowing George M Myers 70 Froehlich Farm Rd Hicks yule NY 11801 1SF Tournament/Pruss Continued page 32 retrieving two winch lines about later column wasnt biggest tournament ever couple reasons timing last-minute site location among format proved will popular scheduled again should held best site ever large meet site Joliet Park Board Airport Joliet IL grass area cut organizers liking week before Joliet Park Board airport manager couldnt have cooperative site isnt considered Soaring get-together future well miss out Again pits Contestants represented over 20 states Canada team event tight contestthat second through fifth MRCS group tournament champion Ken Bates won over 2100 points second fifth separated less 700 points Ken Shaw flew 10-year-old Super Esprit second place Unlimited Best speed times 104 109 both Alex Bower 100-point bonusin outlanding zone drew lot criticism changed expertsmany expertsmissed 25-meterdiameter circle Gordon Pearson Warren Tiahrt should quit IBM Chrysler co-MC banquets missed great Postscript tournaments sponsors since first 1970 has Top Flite specifically Sid Axelrod Back 1970 LSF waiting its 100th member Sid sponsoring tournament continued right up 12th 1981 Looking Hard Find Soaring Goodies JA c3a4fane Jaclory