Radio Control: Electrics

RADIO CONTROL ELECTRICS 1 THIS MONTHS TOPICS include new B-product connector use warning make end-of-charge beeper John Sermos modeler behind Sermos connectors has just announced addition well-regarded much-used connector product line Sermos connectors widely used motors speed controls chargers Its economy connector version selling $180 standard 4-pack two connector pairs about half price high-end Sermos connectors simply standard Anderson part uses same basic interchangeable plastic housing contact assembly found familiar Sermos connectors custom-manufactured John Anderson Anderson sells basic version connector under its own trade name Anderson Powerpoles electrical electronics industry Anderson Powerpoles sometimes used modelers believing same Sermos-brand versions such case Powerpole does have silver plating custom Sermos version rather has 50 microns silver plating specified resistance 600 micro ohms mating cycle life 2000 connections Sermos connectors have custom 250 microns silver 250 micro ohm resistance 100000 mating-cycle life Its old get what pay story can now get versions Sermos RC Snap Connectors Cedar Corners Station Box 16787 Stamford CT 06905 might want reference September 1996 column discussion connectors including relatively new high current contact version announced last summer RESISTORS RI IN 2711321 R2 1110 2711337 R3 150 OHMS 271-1312 RH 150 271-1335 ES 330 0711341 RN-N 4702711330 ARE RNOO SITSCNOATALOS NUMBERS CNJACITOBSSEMICONSUCTORS CI 57 IF 271102401 002 211390* OR MPS3554 276-20161 02 22 liP (272-1026101 15324 2761711 21164744274466 MISC POSTS BEEPER 573OSSN PC 503950 216-1601 IRIREAS NEESES OPTIONAL 14 PIN IC SOCKET 276-16961 END OF CHARGE BEEPER RIO 065356 lB ESSBIO3 Lets look entirely different type connector kind used RC radio related components Deans connector system has long used receivers servos such recall has around well over two decades Deans connectors available several pin counts most-used probably three-pin version because nearly radio system components use three wires Beyond RC applications use variety Deans connectors sorts hobby related electronics projects have always good success recent experience has brought light unappreciated potential risk Deans connectors rather classic male section has pins female end has cavities accept pins latter contacts completely contained plastic housing male end has pins protruding beyond its plastic body sense Deans connector system unlike contemporary radio system connectors trend have contacts male female parts fully enclosed within plastic connector body outline photo shows part system installation Aerovolt design purposely photographed disconnected Deans connector illustrate potential danger Notice male connector pins lead speed control dangling about motor battery cell terminals Ive such pins brush contact cell ends phoofone fried speed control Such mishap likely connectors pins fully within plastic shell outline Please wary such potentially costly danger Id like share story once read author describing electronic parts really being smoke storage vessels Normally under proper use no would suspect 110 Model Aviation e waiting happen Speed-control Deans connector ready fall motor pack cell endcould fry speed control End-of-Charge Beeper described text Note use bare jumper wires needed iiiiiiii LM304-. 0 77 ClROER 0267El 0 Vb68 RI 10 01 263904 R2 13019o51 14RSR02BOI R3122732590 ISVISO Cl3Cl 7 15 4707ICIS7RISSO12RB R42021611470 100220&y RI293934 470 CI -10324 END OF CHARGE BEEPER 61029048656-NESPS03 little resistors transistors ICs stuff actually tiny smoke containers However under abnormal circumstances overloads such parts pressed beyond design application limits components react release smoke sometimes some sizzle bang warning user Worse yet serve masochistic corporal justice same parts will sometimes refuse work thereafter teaching unwary hard lesson misuse abuse wonderful electronic widgets Remember little friends normally allow radios other electronic goodies function command delight very important cause distress upset outpouring smoke As promised last month column will describe assembly use EndEnd-of-Charge Beeper installed authors Astro hOD Works charger internally externally parts needed build End-of-Charge Beeper available Radio Shack Mounts two screws through charger front panel Heres inside look Astro hOD on/off switch installed wired January text details modification Of-Charge Beeper device provides audible advisory motor battery charger has completed its job Thus no longer have stand sentinel over charger pack awaiting completion charge designed circuit use Astro 1 lOD peak detector charger works almost charger including old classic timer-controlled models have found charger will work course charger already has built end-of-charge beeper alarm probably dont need info Using just such devicethe SR Smart Charger/Cyclercaused want beeper other chargers beeper rather simple can built parts current Radio Shack catalog built several during development phase little regard parts sources Along way realized device potentially interest column readers revised component makeup use RS parts did compromise operation did result some growth size beeper can either built charger used externally has two wires connect across charger output/motor battery leads fact connected externally during early field testing case thats needed some adaptor connectors allow paralleling two beeper wires two wires charger output cable motor battery charging connection Lets look schematic operation BOC beeper circuit power/input leads shown schematically V batt ground connections EOC beeper circuit draws few milliamps will never noticed extra load charger operation motor battery terminal voltage sampled resistor divider chain R2-R3-R4 Capacitor Cl filters out charging noise fluctuation resulting relatively small voltage ne SNI CH will aid trouble shooting glitch problems microcontroller counte records gitiches missed vl frames daring flight playback around counting oat ureat troable nhOol syntem glitches try ing owetfaiproent contigurs tiona interference tmquency reminds tarn off ynar receiner mast flight bno Eloy Marez nays consider Snitch lobe naluable elec tronic accesnodes come along recently Electronics Coiner Model Builder September55 Size 132 n f 320 E4 weight 05 ounce Poce $3995 ULTIMATE BAlTERY BACKER BEST way Insure reliable power model Use two battery packs two switch hamesses Runs MAIN pack till drops out switches BACK-UP pack Works standard 4 cell g cell GEL-CELL packs Battery packs can different capacity like 1 200 BOO Solid state design uses MOSFET transistors Used nolensively professional RPVs add own swdch hamesses wiong t5 o fh 0 15weight h osece connectom $4995 NEW Now available wired connectom $5995 uaamug GLITCH aiicTca fl OPTICALLY ISO LATE channels nsa separote battery pack semo powerl Totally eliminates glitching caused heavy duty sernos long leads giant scale airplanes glidem can p side estra power speed Raituirno oaoaao. . own radio semo leads Compatible PCM mdiosl Used Reno Racers NASA too 16 0150 3/4 weight 9 oance $4495 NEWl Now available wired connectom 97995 Mini-Max Throttle microprocessorcontrolled super-small MINIMAX featorn adjustroest start brake wook start ii uroop stick position motoroff fail safe ectensive glitd filter software Designed 1-16 cells amps 50 amps peak Includes selvO connector ann SEAMOSnN connectors Measures lxi SoS Weight 1 oz Introductory price $799B K Stand KBench Wing Stops lbs 15 lbs 16 lbs ID54U1D5 200 lbsna nana K-System Package engins operation$20700 CoMplete K-Sygtem reqired engine OpBrBtlOfl MO regidenfa add 645% sales tax TO ORDERI Call Toll Free 800-700-9884 Fax 417-626-7414 March1997 113 Electronic Model Systems9305 ShIl & NeedlIng Per Order 22955 La Palms Ave Ste 515pjl 119 Yorlo Linda CA 92687 -CredIt Cards Accepted- AmerIcan Express 7144921393 Info OnlyDiscover Masgercard & VIsa 8004458979 Orders Only Shop & Field Support br RC Enthusiast Engineered strength durability & compact storage IYUU $10500 $ 2300 TNR TECHNICAL INC THE BATTERY STORE YOUR LARGEST EISJRIIUTOR FIR SANYO BAiTER HIS RECEIVER PACKS Part # Type V mAh Price 4N-11OAAlI3AA48110$1000 56MC2/3A4~ 4N-600AAAA48600$900 AA4886~14 4KR-1100AAUAA481100$1600 KR-14/5i41 4KR-13005CSub C481300$1300 -10SSub C481 4KR-1400AEA481400$1800 TRANSMITTER PACKS Part# Type V mAh Price 8 8KR-800AAEAA 96 800 $2500 -flAAj j 96 f9C OO NICKEL METAL-HYDRIDE Part# Type V mAh Price 48 4HR-4/5AUS4/5AA 481850 $2295 314R-MUA* 9612 /5AUS 415AA1 12 118501 $550 CALL FOR FREE CATALOG TNR TECHNICAL INC 301 Central Park Drive Sanford FL 32771 800-346-0601 FAX 407321-3208 appearing across R3 buffered quad operational amplifier sections ICla IC lb ICic same resistor voltage differentially applied section ICld ICld configured comparator actual voltage across R3 its buffered equivalent varies number cells under charge state charge no consequence What matters ICld inverting input typically positive noninverting input As result ICid output normally held low transistor Q2 beeper device resting off state use charger operation ceases typically pack voltage suddenly drops several hundred millivolts drop manifests itself corresponding reduction drop resistor R3 relatively fast voltage reduction immediately appears inverting input ICid However capacitor C2 delays corresponding drop noninverting input Under condition lasts several seconds comparator changes state Q2 becomes forward-biased beeper B 1 announces completion charge several-secondlong beep lets know its time fly Zener diode Z 1 used simply overvoltage protection circuit parts beeper used larger pack voltages As shown EOC beeper has used packs five 16 cells design limit should work right up cell count Transistor Q 1 wired emitter follower supplies beeper circuit operating voltage near applied battery level limited zener level more-experienced readers may wondering about using quad op amp note job can done quite comparably dual device such LM 358but thats Radio Shack part effect two wasted op amp sections quad simply wired service multiple unneeded buffers incidental utilization fulfills need tie down unused op amp sections safe circuit manner Using em manner shown just fine actually makes circuit board assembly flow better otherwise would circuit parts assemble nicely section cut universal printed circuit holeboard assembly drawing top view component side view board printed circuit lands underneath shown dotted lines drawing Note several lands cut X locationsdo forget step Please sure observe polarities shown well orientation LM324 quad op amp transistor orientations etc Three items assembly drawing may bit obscure zener diode cathode black band up toward Ql base Another ICl pin 4 wired top side board under IC positive conductor Finally Q2 collector wired beeper - terminal short jumper under PC boardalso shown dotted assembly drawing often use IC socket during such circuit-building job insert IC else finished Its always good idea carefully examine new circuit assembly lens before firing up Check component locations soldering connections correctness quality work Remember EOC beeper made up little smoke-filled containers discussed above looks well test proper operation externally connecting battery pack under charge shut off charger manually have access variable-voltage lab power supply can power up circuit convenient voltage five volts up quickly turn voltage down disconnect circuit wires thats easier case alarm should sound following applied voltage drop duration resulting beep will longer larger pack voltages because voltage-dependent decay time needed Continued page 121 114 Model Aviation * forget units remember1 NOT JUST CHARGERS COMPLETE AUTOMATIC BATTERY MAINTENANCE SYSTEMS r66Ca Ra Products 21 Urban P0 Box 436 Paineaville OH 44077 216-639-8274 Hrs 9-12 2-7 Central Time SASE information ers inquiries invited Wing Span 545 nd Fuselage 1/32 Wing Area 520 sq plywood wrapped around lite Length 42 inply formers some Weight 52 lbsvacuum formed parts Engine 40 46 2C Wings balsa 1/16 48-60 4Csheeted foam cores Radio 4 Channels Aerobatics performance Color Blue & WhiteThis aircraft made have Red & Whitethe same aerobatic qualities Covering High Qualityas full scale polyester film fuelknife edge flat spin vvivt~nt intinglomcevalrs etc PACIFIC AEROMODEL MFG INC 15437 PROCTOIt AVE CITY OF INDUSTRY CA 91745 VoiceFax00 818 961 61 99 8181 330-9351 800 78001 ze ORDERSONV RC ElectricslKopski Continued page 114 holding capacitor C2 Loudness also varies pack cell count up point beeper mounted two screws through charger front panel used two one-inch-long spacers cut plastic ball-point pen bodies between circuit board assembly charger panel choose install EOC beeper inside charger locate connections charger output leads wire two beeper circuit power leads same points very careful about polarity damage surrounding parts wiring charger 1 lOD location quite tight its good thing looked magnifying glass before fired up youre uneasy have skilled friend use EOC beeper external charger go external route can fit circuit assembly small plastic box simply encase board heatshrink tubing wide variety heatshrink covering sizes up several inches diameter available New Creations RC Box 496 Willis TX 77378 works very well applications such Heres hoping End-Of-Charge Beeper adds Electric flying pleasure has Please include SASE correspondence youd like reply wrote expecting response didnt receive might just ponder whether forgot SASE Heres wishing everyone happy quiet Electric landings 4SANYO RC-2000 md Cells$650 Ea SANYO RC-2000 Matched md Cells$700 Ea SANYO 1700 SCRC Matched Ind Cells$500 Ea SANYO N 1700 SCRO md Cells$450 Ea SANYO N 1400 SCR md Cells$300 Ea SANYO NiOQO SCR md Cells$350 Ea SANYO N800 AR md Cells$350 Ea SANYO KR600 AE md Cells$250 Ea SANYO N350 AA md Cells$250 Ea SANYO 600 AA Rechargeable$ 150 Ea SAFT Full C Rechargeable Batteries$ 100 Ea 4 Cell 270 AA Receiver Pk$1000 Pk 5 Cell 1000 AE Receiver Pk$1800 Pk CONNECTORS red black$ 150 Pr -WUAI5 RAR ANfl RRAIDS 5 III GiantsHelp PromoteI I- i HIG _ __ Non-Competitive ... ng Large RIC Air Craft i I IMAA membership includes quarterly magazine High Flight __________________ __________I MEMBERSHIP APPLICATiON IJ NEW 0 RENEWAL Date19 Yearly Dues $1500 USA $2000 US Canada & Mexico $3000 US Elsewhere Make CHECK MONEY ORDER Payable INTERNATiONAL MINIATURE AIRCRAFT ASSOCIATION INC I Name _________________________________________ Phone ___________________________ I Street _________________________________________ P0 Box/Route Box __________________ _______________________State/Province ________________Zip IMAA _______ AMA Number________ MAAC _______Chapteri L lL TO IMAA Secretary DON E VINEYARD Hiliclale Rood na KS 67401 March 1997 121

RADIO CONTROL ELECTRICS 1 THIS MONTHS TOPICS include new B-product connector use warning make end-of-charge beeper John Sermos modeler behind Sermos connectors has just announced addition well-regarded much-used connector product line Sermos connectors widely used motors speed controls chargers Its economy connector version selling $180 standard 4-pack two connector pairs about half price high-end Sermos connectors simply standard Anderson part uses same basic interchangeable plastic housing contact assembly found familiar Sermos connectors custom-manufactured John Anderson Anderson sells basic version connector under its own trade name Anderson Powerpoles electrical electronics industry Anderson Powerpoles sometimes used modelers believing same Sermos-brand versions such case Powerpole does have silver plating custom Sermos version rather has 50 microns silver plating specified resistance 600 micro ohms mating cycle life 2000 connections Sermos connectors have custom 250 microns silver 250 micro ohm resistance 100000 mating-cycle life Its old get what pay story can now get versions Sermos RC Snap Connectors Cedar Corners Station Box 16787 Stamford CT 06905 might want reference September 1996 column discussion connectors including relatively new high current contact version announced last summer RESISTORS RI IN 2711321 R2 1110 2711337 R3 150 OHMS 271-1312 RH 150 271-1335 ES 330 0711341 RN-N 4702711330 ARE RNOO SITSCNOATALOS NUMBERS CNJACITOBSSEMICONSUCTORS CI 57 IF 271102401 002 211390* OR MPS3554 276-20161 02 22 liP (272-1026101 15324 2761711 21164744274466 MISC POSTS BEEPER 573OSSN PC 503950 216-1601 IRIREAS NEESES OPTIONAL 14 PIN IC SOCKET 276-16961 END OF CHARGE BEEPER RIO 065356 lB ESSBIO3 Lets look entirely different type connector kind used RC radio related components Deans connector system has long used receivers servos such recall has around well over two decades Deans connectors available several pin counts most-used probably three-pin version because nearly radio system components use three wires Beyond RC applications use variety Deans connectors sorts hobby related electronics projects have always good success recent experience has brought light unappreciated potential risk Deans connectors rather classic male section has pins female end has cavities accept pins latter contacts completely contained plastic housing male end has pins protruding beyond its plastic body sense Deans connector system unlike contemporary radio system connectors trend have contacts male female parts fully enclosed within plastic connector body outline photo shows part system installation Aerovolt design purposely photographed disconnected Deans connector illustrate potential danger Notice male connector pins lead speed control dangling about motor battery cell terminals Ive such pins brush contact cell ends phoofone fried speed control Such mishap likely connectors pins fully within plastic shell outline Please wary such potentially costly danger Id like share story once read author describing electronic parts really being smoke storage vessels Normally under proper use no would suspect 110 Model Aviation e waiting happen Speed-control Deans connector ready fall motor pack cell endcould fry speed control End-of-Charge Beeper described text Note use bare jumper wires needed iiiiiiii LM304-. 0 77 ClROER 0267El 0 Vb68 RI 10 01 263904 R2 13019o51 14RSR02BOI R3122732590 ISVISO Cl3Cl 7 15 4707ICIS7RISSO12RB R42021611470 100220&y RI293934 470 CI -10324 END OF CHARGE BEEPER 61029048656-NESPS03 little resistors transistors ICs stuff actually tiny smoke containers However under abnormal circumstances overloads such parts pressed beyond design application limits components react release smoke sometimes some sizzle bang warning user Worse yet serve masochistic corporal justice same parts will sometimes refuse work thereafter teaching unwary hard lesson misuse abuse wonderful electronic widgets Remember little friends normally allow radios other electronic goodies function command delight very important cause distress upset outpouring smoke As promised last month column will describe assembly use EndEnd-of-Charge Beeper installed authors Astro hOD Works charger internally externally parts needed build End-of-Charge Beeper available Radio Shack Mounts two screws through charger front panel Heres inside look Astro hOD on/off switch installed wired January text details modification Of-Charge Beeper device provides audible advisory motor battery charger has completed its job Thus no longer have stand sentinel over charger pack awaiting completion charge designed circuit use Astro 1 lOD peak detector charger works almost charger including old classic timer-controlled models have found charger will work course charger already has built end-of-charge beeper alarm probably dont need info Using just such devicethe SR Smart Charger/Cyclercaused want beeper other chargers beeper rather simple can built parts current Radio Shack catalog built several during development phase little regard parts sources Along way realized device potentially interest column readers revised component makeup use RS parts did compromise operation did result some growth size beeper can either built charger used externally has two wires connect across charger output/motor battery leads fact connected externally during early field testing case thats needed some adaptor connectors allow paralleling two beeper wires two wires charger output cable motor battery charging connection Lets look schematic operation BOC beeper circuit power/input leads shown schematically V batt ground connections EOC beeper circuit draws few milliamps will never noticed extra load charger operation motor battery terminal voltage sampled resistor divider chain R2-R3-R4 Capacitor Cl filters out charging noise fluctuation resulting relatively small voltage ne SNI CH will aid trouble shooting glitch problems microcontroller counte records gitiches missed vl frames daring flight playback around counting oat ureat troable nhOol syntem glitches try ing owetfaiproent contigurs tiona interference tmquency reminds tarn off ynar receiner mast flight bno Eloy Marez nays consider Snitch lobe naluable elec tronic accesnodes come along recently Electronics Coiner Model Builder September55 Size 132 n f 320 E4 weight 05 ounce Poce $3995 ULTIMATE BAlTERY BACKER BEST way Insure reliable power model Use two battery packs two switch hamesses Runs MAIN pack till drops out switches BACK-UP pack Works standard 4 cell g cell GEL-CELL packs Battery packs can different capacity like 1 200 BOO Solid state design uses MOSFET transistors Used nolensively professional RPVs add own swdch hamesses wiong t5 o fh 0 15weight h osece connectom $4995 NEW Now available wired connectom $5995 uaamug GLITCH aiicTca fl OPTICALLY ISO LATE channels nsa separote battery pack semo powerl Totally eliminates glitching caused heavy duty sernos long leads giant scale airplanes glidem can p side estra power speed Raituirno oaoaao. . own radio semo leads Compatible PCM mdiosl Used Reno Racers NASA too 16 0150 3/4 weight 9 oance $4495 NEWl Now available wired connectom 97995 Mini-Max Throttle microprocessorcontrolled super-small MINIMAX featorn adjustroest start brake wook start ii uroop stick position motoroff fail safe ectensive glitd filter software Designed 1-16 cells amps 50 amps peak Includes selvO connector ann SEAMOSnN connectors Measures lxi SoS Weight 1 oz Introductory price $799B K Stand KBench Wing Stops lbs 15 lbs 16 lbs ID54U1D5 200 lbsna nana K-System Package engins operation$20700 CoMplete K-Sygtem reqired engine OpBrBtlOfl MO regidenfa add 645% sales tax TO ORDERI Call Toll Free 800-700-9884 Fax 417-626-7414 March1997 113 Electronic Model Systems9305 ShIl & NeedlIng Per Order 22955 La Palms Ave Ste 515pjl 119 Yorlo Linda CA 92687 -CredIt Cards Accepted- AmerIcan Express 7144921393 Info OnlyDiscover Masgercard & VIsa 8004458979 Orders Only Shop & Field Support br RC Enthusiast Engineered strength durability & compact storage IYUU $10500 $ 2300 TNR TECHNICAL INC THE BATTERY STORE YOUR LARGEST EISJRIIUTOR FIR SANYO BAiTER HIS RECEIVER PACKS Part # Type V mAh Price 4N-11OAAlI3AA48110$1000 56MC2/3A4~ 4N-600AAAA48600$900 AA4886~14 4KR-1100AAUAA481100$1600 KR-14/5i41 4KR-13005CSub C481300$1300 -10SSub C481 4KR-1400AEA481400$1800 TRANSMITTER PACKS Part# Type V mAh Price 8 8KR-800AAEAA 96 800 $2500 -flAAj j 96 f9C OO NICKEL METAL-HYDRIDE Part# Type V mAh Price 48 4HR-4/5AUS4/5AA 481850 $2295 314R-MUA* 9612 /5AUS 415AA1 12 118501 $550 CALL FOR FREE CATALOG TNR TECHNICAL INC 301 Central Park Drive Sanford FL 32771 800-346-0601 FAX 407321-3208 appearing across R3 buffered quad operational amplifier sections ICla IC lb ICic same resistor voltage differentially applied section ICld ICld configured comparator actual voltage across R3 its buffered equivalent varies number cells under charge state charge no consequence What matters ICld inverting input typically positive noninverting input As result ICid output normally held low transistor Q2 beeper device resting off state use charger operation ceases typically pack voltage suddenly drops several hundred millivolts drop manifests itself corresponding reduction drop resistor R3 relatively fast voltage reduction immediately appears inverting input ICid However capacitor C2 delays corresponding drop noninverting input Under condition lasts several seconds comparator changes state Q2 becomes forward-biased beeper B 1 announces completion charge several-secondlong beep lets know its time fly Zener diode Z 1 used simply overvoltage protection circuit parts beeper used larger pack voltages As shown EOC beeper has used packs five 16 cells design limit should work right up cell count Transistor Q 1 wired emitter follower supplies beeper circuit operating voltage near applied battery level limited zener level more-experienced readers may wondering about using quad op amp note job can done quite comparably dual device such LM 358but thats Radio Shack part effect two wasted op amp sections quad simply wired service multiple unneeded buffers incidental utilization fulfills need tie down unused op amp sections safe circuit manner Using em manner shown just fine actually makes circuit board assembly flow better otherwise would circuit parts assemble nicely section cut universal printed circuit holeboard assembly drawing top view component side view board printed circuit lands underneath shown dotted lines drawing Note several lands cut X locationsdo forget step Please sure observe polarities shown well orientation LM324 quad op amp transistor orientations etc Three items assembly drawing may bit obscure zener diode cathode black band up toward Ql base Another ICl pin 4 wired top side board under IC positive conductor Finally Q2 collector wired beeper - terminal short jumper under PC boardalso shown dotted assembly drawing often use IC socket during such circuit-building job insert IC else finished Its always good idea carefully examine new circuit assembly lens before firing up Check component locations soldering connections correctness quality work Remember EOC beeper made up little smoke-filled containers discussed above looks well test proper operation externally connecting battery pack under charge shut off charger manually have access variable-voltage lab power supply can power up circuit convenient voltage five volts up quickly turn voltage down disconnect circuit wires thats easier case alarm should sound following applied voltage drop duration resulting beep will longer larger pack voltages because voltage-dependent decay time needed Continued page 121 114 Model Aviation * forget units remember1 NOT JUST CHARGERS COMPLETE AUTOMATIC BATTERY MAINTENANCE SYSTEMS r66Ca Ra Products 21 Urban P0 Box 436 Paineaville OH 44077 216-639-8274 Hrs 9-12 2-7 Central Time SASE information ers inquiries invited Wing Span 545 nd Fuselage 1/32 Wing Area 520 sq plywood wrapped around lite Length 42 inply formers some Weight 52 lbsvacuum formed parts Engine 40 46 2C Wings balsa 1/16 48-60 4Csheeted foam cores Radio 4 Channels Aerobatics performance Color Blue & WhiteThis aircraft made have Red & Whitethe same aerobatic qualities Covering High Qualityas full scale polyester film fuelknife edge flat spin vvivt~nt intinglomcevalrs etc PACIFIC AEROMODEL MFG INC 15437 PROCTOIt AVE CITY OF INDUSTRY CA 91745 VoiceFax00 818 961 61 99 8181 330-9351 800 78001 ze ORDERSONV RC ElectricslKopski Continued page 114 holding capacitor C2 Loudness also varies pack cell count up point beeper mounted two screws through charger front panel used two one-inch-long spacers cut plastic ball-point pen bodies between circuit board assembly charger panel choose install EOC beeper inside charger locate connections charger output leads wire two beeper circuit power leads same points very careful about polarity damage surrounding parts wiring charger 1 lOD location quite tight its good thing looked magnifying glass before fired up youre uneasy have skilled friend use EOC beeper external charger go external route can fit circuit assembly small plastic box simply encase board heatshrink tubing wide variety heatshrink covering sizes up several inches diameter available New Creations RC Box 496 Willis TX 77378 works very well applications such Heres hoping End-Of-Charge Beeper adds Electric flying pleasure has Please include SASE correspondence youd like reply wrote expecting response didnt receive might just ponder whether forgot SASE Heres wishing everyone happy quiet Electric landings 4SANYO RC-2000 md Cells$650 Ea SANYO RC-2000 Matched md Cells$700 Ea SANYO 1700 SCRC Matched Ind Cells$500 Ea SANYO N 1700 SCRO md Cells$450 Ea SANYO N 1400 SCR md Cells$300 Ea SANYO NiOQO SCR md Cells$350 Ea SANYO N800 AR md Cells$350 Ea SANYO KR600 AE md Cells$250 Ea SANYO N350 AA md Cells$250 Ea SANYO 600 AA Rechargeable$ 150 Ea SAFT Full C Rechargeable Batteries$ 100 Ea 4 Cell 270 AA Receiver Pk$1000 Pk 5 Cell 1000 AE Receiver Pk$1800 Pk CONNECTORS red black$ 150 Pr -WUAI5 RAR ANfl RRAIDS 5 III GiantsHelp PromoteI I- i HIG _ __ Non-Competitive ... ng Large RIC Air Craft i I IMAA membership includes quarterly magazine High Flight __________________ __________I MEMBERSHIP APPLICATiON IJ NEW 0 RENEWAL Date19 Yearly Dues $1500 USA $2000 US Canada & Mexico $3000 US Elsewhere Make CHECK MONEY ORDER Payable INTERNATiONAL MINIATURE AIRCRAFT ASSOCIATION INC I Name _________________________________________ Phone ___________________________ I Street _________________________________________ P0 Box/Route Box __________________ _______________________State/Province ________________Zip IMAA _______ AMA Number________ MAAC _______Chapteri L lL TO IMAA Secretary DON E VINEYARD Hiliclale Rood na KS 67401 March 1997 121