with dozens details support greatest areas assistance allow 1985 Nats theme airplane Ken Flag brs Gee Bee Model Y Senior Sportster fly parked Nats area week long plane tremendous drawing card thousands pictures taken display particularly appropriate since nearby City Springfield home Gee Bee racers during Thirties contrast 1983 RC Sailplanes flew almost trouble-free over four days compe tition 1985 Nats Soaring scene few problems local paging system inter ference shut down frequency Another day rain followed day wind Ragardless tremendous amount flying done Davey retrieval winches 985NATSY 985 NA TS Y I985NATS down Free Flight continuedespecially FF Scale also much disbelief Wakefield models seen achieve maxi mum duration flights rain Although some complained about continuing downpour took stride FF Scale contestants fact asked whether wanted quit go agreed keep flying Aside two days unhappy weather midweek flying conditions mostly great Nats started right time first Sunday morning RC international class Pylon Racing finished early week later RC Scale Sunday afternoon Because Westover site permits Free Flight Control Line Radio Control events flown within area less mile square skies Continued Da2e 134 blamed some launching prob lems 1984 performed beautifully negated need usual line-retrieval vehicles manpower past Providing separate sites RC Sailplanes Helicopters helped both events get flying would otherwise have possible Helicopter event also tremendously helped year under direction Horace Hagen recruited good crew run events too some rain wind problems got flying necessary finish schedule Likewise Soaring Event Director Jeff Troy recruited large crew run events excellent fashion Most amazing rain day see Free Flight events proceeding scheduled Control Line RC events Westover shut Left AMA Nate Expo featured Industry exhibits static display models technical seminars addition Swap snop ana model engine collectors get together Chicopee Quality Inn near WestoverAir Force Base Right Travis McGinnis stand ing conducts Nate Expo seminar FAI RC Aerobatics Otheractivities included National Free Flight Society Symposium talks newsletters noise reduction battery care videotaping years Nate chock full sights sounds experiences Radio Technique George IL Myers ABOUT 900 TRANSMITTERS proc essed 1985 Nats Helicopter radios predominantly PCM Pattern radios about 50% PCM 50% other AM FM Pylon Sailplane about 70% AM very few PCM Radios Scale about 85% old AM balance split between new AM FM Interference problems minimal due Contest Directors plan ning anything else Jeff Troy 2A-min walk set up between Sailplane launch site landing circles Result tired feet no intermod problems Pylon Pattern Scale used frequency groupings avoid ed usual problems Result very few crash es practically due pilot error result some kind failure cement truck dispatcher located iii Spring field 1983 active 7216 Blu/Wh expected addition Bill Hershberger detected new pocket pager 72320 Pur/Wh Sailplane site Monday morning about same time discovering Helicopter site 12 miles away police radio 7564 Gn/Wh no problem heard no terferences new RC channels reported could verified independently George P Steiner processed contes tants transmitters through custom-built scanner/tester separating out interesting ones careful inspection Hewlett-Packard equipment set up programmed Dan Kahn operated Bill Hershberger found couple sets badly need repair/retuning Pete Waters District VII VP proprietor Kraft Midwest Paul Holsten Ace R/C Inc set up repair shop room Quality Inn fixed problems found though some Ace Pro-Line Kraft transmitters thanks got efforts some clot broke room stole two Petes transmitters supplies including about 150 crystals person believed thief later apprehended Chicopee police Another transmitter charger stolen lobby L-R Bill Hershberger George P Steiner George M Myers members AMA Frequency Committee volunteered work 1985 Nate discuss what learning computer-controlled Hewlett-Packard Spectrum Analyzer Contestant radios tested collect information building Frequency Committee data base 42 Model Aviation 985 NATS 985 NATS V I985NATSM Quality Inn know about have no way identifying Modelers must unite rid themselves kind parasite basic reason having HewlettPackard equipment Nats build up new data base Frequency Committee might able define exactly what needed produce satisfactory narrow-band RC system tested both trans mitters receivers rained Out important receiver data base collec tion activity Wednesday remaining info voluminous report will have come later did learn newest equipment PCM mainly has fantastically good perfor mance Overall clear recent trans mitters both AM FM very good Likewise receiver front ends IF strips excellent place work needed signal detector section Present FM detectors too responsive AM signals may spread spectrum technique often mentioned Jim Oddino will necessary spread spectrum instead transmitting 1 0 digital informa tion 1 has pattern can recog nized Likewise 0 Consequently receiver can identify valid information its characteristic patterns spread spectrum can made solve intermod other inter ference problems Id like see someone Unfortunately FCC cool spread spec trum right now called upon investigate inter mod problem Pylon starting line Put ting same planes pilots transmitters same configuration starting line location near ready boxes quickly showed no problem site Moving out starting line repeated test problem returned fix simple separated planes 3 ft between wing tips using something like 10 ft problem went away main change previous two days racing runway gotten wet overnight ap parently improved coupling between receivers various airplanes receiver also low-power transmit ter Under right conditions like wet run way receivers can affect another receiver testing George Steiner Bill Hersh berger doing Quality Inn showed older receivers radiate lot newer designs Pylon planes seem use lot older receivers adds up Just safer CD also reset matrix no 38 40 42 type group ings No problems 1983 Springfield first Nats new RC channels About half transmitters used new channels got taking advantage Futaba Airtronics $10 swap offer quickly matched some way other manufacturers Virtually transmitter AM type no frequency-related problems did have problems ce ment truck dispatcher 72160 police radio 75640 nothing new channels pronounced success Reno 1984 another matter entirely lot new FM sets made appearance setups crowded especially Sailplanes Intermod other problems rampant FM got black eye So did AMA Nats year showed use head get good results AM FM PCM worked well together long elementary precautions about channel usage flight line separations observed three Nationals showed no interference new RC channels leads right reader letter Dear George .. confused point September 1983 MA state havent found interference new channels law shouldnt any. Back April 1985 MA stated Another reason FCCs decision expected some channels some locations would interfered licensed Primary Users right what kind Primary User interference up against William E Stodgell Jefferson City MO really like hear readers read column carefullyand think Both right Bill have exclusive use new RC channels also Secon dary Users must accept interference Primary Users case such interference can come Manufacturers Radio Service MRS Personal Radio Service PRS trans mitter operating even-numbered fre quency 10 kHz away RC channel As example Empire Paging transmitting 300 watts 72800 MHz top Empire State Building could interfere use RC5O 72790 MHz New York City area fact dont keep running people fly 8 10 miles Empire State Building RC5O ill effect reason Empire Paging transmitter Continued page 135 November 1985 43 ADove iypicai osciiiogram 05 RM iranamissur anowing ma muuuiaiiun aIoakJanu mci trouble FM receivers Below Atypical osci Ilogram receiver local oscillatorfundamental frenuency Nate nbsence modulation Such testina may lead reliable RC systems BYRON flRIGINALS bt 9 6o, SIlO Ph ii Full Line Catalog glance through catalog will prove Byron Originals recognized quality world over since picture worth thousand words have packed catalog full color black white photos highly descriptive illustrations well Youll pleased see new products improvements have joined family scale aircraft propulsion systems related accessories talk about value dollars Check factory direct prices competitive pricing industry ts exclusive accessories standard hobby items such finishing materials glues Dont delay Order Byron Originals catalog today Simply send $300 Byron OriginalsePO Box 279Ida Grove Iowa 51445 Set Standards Model Aviation already plans well underway 1986 event currently scheduled July 27 August 3 Lake Charles Louisiana site 1974 1975 1978 Nats special schedule being considered help celebrate AMAs 50th anniversary next yearand expand participation AMAs non-competitive membershipby possible insertion two three days fun flying middle weekend what may develop two-week Nats later now enjoy glow 1985s success look putting together bigger better event 1986 FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLY Nats Radio Tech/Myers Continued page 43 brand new carefully malntained peak ef ficiency doesnt waste power slopping over RC 50 doesnt belong Thats great us another place another time might lucky clear now Thanks writing George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 Nats RC Scale/Wischers Continued page 55 thieves stole airplanes equipment car Quality Inn parking lot Taken Ralphs 13-year-old Windecker Eagle white gold number 15 Webra Speed 60 engine top wing A-scale Fokker D-VII wing lozenge camouflage pattern masked sprayed two-month period concentrated work Also taken fuselage Dick Allens Fokker Triplane Ralphs flight box also other valuable electronic equipment items stolen cars flew RC Scale event owe gratitude director Bob Underwood two daughters Ann Cathy spent four days tabulating scores Flight line operations kept smooth motion Dave Sally Brown site Ron Hesseibrock other thanks also Continued page 138 dli 1 1 U WY N2 OM URUWN JR CAMIIOLLL EASYBU COVERITE cox DUBRO ILT MODELS ENYA- FAI FLYLINE FOX GOLDBERG GOLDEN AGE REPRO IGENE DUBOIS GUILLOW- K&B K&S L R MRC OS MAX PACTRA PECK-POLYMER PERFECT R/N MODELS SEAGLEN SIG STERLING- SULLIVAN SUPER TIGRE TAFFINDER TELCO TOP FLITE- TREXLER WILLIAMS & OTHERS ESTES MODEL ROCKETS Send 5100 Cah Cheek Stamp 44 page tabloid nice DISCOUNT Caialog 900 illustratIons over 700 Kits choose MAILOADER PHONEORDER IN STORE PENN VALLEY HOBBY CENTER 837 WKain t Landml.1a49446 L BOEING F4B2 90 Wingspan DOUGLAS 025C 80 Wingspan F/W FW5G Stosser 1035 Span WACO/YKS-6 -99 Wingspan RYAN S-C -112 Wingspan T-28B 102 Wingspan STEVENS AKRO -100 Wingspan WATERMAN ARROWBILE 92 Span MAMMOTH SCALE PLAN7 CESSNA 180 108 Wingspan CURTISS P400 102 Wingspan BERLINER/JOYCE P-lB 1025 PAZMANY PL-4 105 Wingspan F/W FW44J Stieglitz 895 Span DOUGLAS AiN Skyraider 120 SHOESTRING 95 Wingspan FBF HELLCAT -98 Wingspan Plans mailed air rolled heavy-duty tube P40 T28B Skyraider Hellcat Stevens Acro $3300 others $2400 Please add $500 postage handling California residents add 60/0 sales tax Overseas orders add $1200 air postage MAMMOTH SCALE PLANS 3351 Pruneridge Ave Santa Clara CA 95051 244-5814 November 1985135
Edition: Model Aviation - 1985/11
Page Numbers: 42, 43, 135
with dozens details support greatest areas assistance allow 1985 Nats theme airplane Ken Flag brs Gee Bee Model Y Senior Sportster fly parked Nats area week long plane tremendous drawing card thousands pictures taken display particularly appropriate since nearby City Springfield home Gee Bee racers during Thirties contrast 1983 RC Sailplanes flew almost trouble-free over four days compe tition 1985 Nats Soaring scene few problems local paging system inter ference shut down frequency Another day rain followed day wind Ragardless tremendous amount flying done Davey retrieval winches 985NATSY 985 NA TS Y I985NATS down Free Flight continuedespecially FF Scale also much disbelief Wakefield models seen achieve maxi mum duration flights rain Although some complained about continuing downpour took stride FF Scale contestants fact asked whether wanted quit go agreed keep flying Aside two days unhappy weather midweek flying conditions mostly great Nats started right time first Sunday morning RC international class Pylon Racing finished early week later RC Scale Sunday afternoon Because Westover site permits Free Flight Control Line Radio Control events flown within area less mile square skies Continued Da2e 134 blamed some launching prob lems 1984 performed beautifully negated need usual line-retrieval vehicles manpower past Providing separate sites RC Sailplanes Helicopters helped both events get flying would otherwise have possible Helicopter event also tremendously helped year under direction Horace Hagen recruited good crew run events too some rain wind problems got flying necessary finish schedule Likewise Soaring Event Director Jeff Troy recruited large crew run events excellent fashion Most amazing rain day see Free Flight events proceeding scheduled Control Line RC events Westover shut Left AMA Nate Expo featured Industry exhibits static display models technical seminars addition Swap snop ana model engine collectors get together Chicopee Quality Inn near WestoverAir Force Base Right Travis McGinnis stand ing conducts Nate Expo seminar FAI RC Aerobatics Otheractivities included National Free Flight Society Symposium talks newsletters noise reduction battery care videotaping years Nate chock full sights sounds experiences Radio Technique George IL Myers ABOUT 900 TRANSMITTERS proc essed 1985 Nats Helicopter radios predominantly PCM Pattern radios about 50% PCM 50% other AM FM Pylon Sailplane about 70% AM very few PCM Radios Scale about 85% old AM balance split between new AM FM Interference problems minimal due Contest Directors plan ning anything else Jeff Troy 2A-min walk set up between Sailplane launch site landing circles Result tired feet no intermod problems Pylon Pattern Scale used frequency groupings avoid ed usual problems Result very few crash es practically due pilot error result some kind failure cement truck dispatcher located iii Spring field 1983 active 7216 Blu/Wh expected addition Bill Hershberger detected new pocket pager 72320 Pur/Wh Sailplane site Monday morning about same time discovering Helicopter site 12 miles away police radio 7564 Gn/Wh no problem heard no terferences new RC channels reported could verified independently George P Steiner processed contes tants transmitters through custom-built scanner/tester separating out interesting ones careful inspection Hewlett-Packard equipment set up programmed Dan Kahn operated Bill Hershberger found couple sets badly need repair/retuning Pete Waters District VII VP proprietor Kraft Midwest Paul Holsten Ace R/C Inc set up repair shop room Quality Inn fixed problems found though some Ace Pro-Line Kraft transmitters thanks got efforts some clot broke room stole two Petes transmitters supplies including about 150 crystals person believed thief later apprehended Chicopee police Another transmitter charger stolen lobby L-R Bill Hershberger George P Steiner George M Myers members AMA Frequency Committee volunteered work 1985 Nate discuss what learning computer-controlled Hewlett-Packard Spectrum Analyzer Contestant radios tested collect information building Frequency Committee data base 42 Model Aviation 985 NATS 985 NATS V I985NATSM Quality Inn know about have no way identifying Modelers must unite rid themselves kind parasite basic reason having HewlettPackard equipment Nats build up new data base Frequency Committee might able define exactly what needed produce satisfactory narrow-band RC system tested both trans mitters receivers rained Out important receiver data base collec tion activity Wednesday remaining info voluminous report will have come later did learn newest equipment PCM mainly has fantastically good perfor mance Overall clear recent trans mitters both AM FM very good Likewise receiver front ends IF strips excellent place work needed signal detector section Present FM detectors too responsive AM signals may spread spectrum technique often mentioned Jim Oddino will necessary spread spectrum instead transmitting 1 0 digital informa tion 1 has pattern can recog nized Likewise 0 Consequently receiver can identify valid information its characteristic patterns spread spectrum can made solve intermod other inter ference problems Id like see someone Unfortunately FCC cool spread spec trum right now called upon investigate inter mod problem Pylon starting line Put ting same planes pilots transmitters same configuration starting line location near ready boxes quickly showed no problem site Moving out starting line repeated test problem returned fix simple separated planes 3 ft between wing tips using something like 10 ft problem went away main change previous two days racing runway gotten wet overnight ap parently improved coupling between receivers various airplanes receiver also low-power transmit ter Under right conditions like wet run way receivers can affect another receiver testing George Steiner Bill Hersh berger doing Quality Inn showed older receivers radiate lot newer designs Pylon planes seem use lot older receivers adds up Just safer CD also reset matrix no 38 40 42 type group ings No problems 1983 Springfield first Nats new RC channels About half transmitters used new channels got taking advantage Futaba Airtronics $10 swap offer quickly matched some way other manufacturers Virtually transmitter AM type no frequency-related problems did have problems ce ment truck dispatcher 72160 police radio 75640 nothing new channels pronounced success Reno 1984 another matter entirely lot new FM sets made appearance setups crowded especially Sailplanes Intermod other problems rampant FM got black eye So did AMA Nats year showed use head get good results AM FM PCM worked well together long elementary precautions about channel usage flight line separations observed three Nationals showed no interference new RC channels leads right reader letter Dear George .. confused point September 1983 MA state havent found interference new channels law shouldnt any. Back April 1985 MA stated Another reason FCCs decision expected some channels some locations would interfered licensed Primary Users right what kind Primary User interference up against William E Stodgell Jefferson City MO really like hear readers read column carefullyand think Both right Bill have exclusive use new RC channels also Secon dary Users must accept interference Primary Users case such interference can come Manufacturers Radio Service MRS Personal Radio Service PRS trans mitter operating even-numbered fre quency 10 kHz away RC channel As example Empire Paging transmitting 300 watts 72800 MHz top Empire State Building could interfere use RC5O 72790 MHz New York City area fact dont keep running people fly 8 10 miles Empire State Building RC5O ill effect reason Empire Paging transmitter Continued page 135 November 1985 43 ADove iypicai osciiiogram 05 RM iranamissur anowing ma muuuiaiiun aIoakJanu mci trouble FM receivers Below Atypical osci Ilogram receiver local oscillatorfundamental frenuency Nate nbsence modulation Such testina may lead reliable RC systems BYRON flRIGINALS bt 9 6o, SIlO Ph ii Full Line Catalog glance through catalog will prove Byron Originals recognized quality world over since picture worth thousand words have packed catalog full color black white photos highly descriptive illustrations well Youll pleased see new products improvements have joined family scale aircraft propulsion systems related accessories talk about value dollars Check factory direct prices competitive pricing industry ts exclusive accessories standard hobby items such finishing materials glues Dont delay Order Byron Originals catalog today Simply send $300 Byron OriginalsePO Box 279Ida Grove Iowa 51445 Set Standards Model Aviation already plans well underway 1986 event currently scheduled July 27 August 3 Lake Charles Louisiana site 1974 1975 1978 Nats special schedule being considered help celebrate AMAs 50th anniversary next yearand expand participation AMAs non-competitive membershipby possible insertion two three days fun flying middle weekend what may develop two-week Nats later now enjoy glow 1985s success look putting together bigger better event 1986 FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLY Nats Radio Tech/Myers Continued page 43 brand new carefully malntained peak ef ficiency doesnt waste power slopping over RC 50 doesnt belong Thats great us another place another time might lucky clear now Thanks writing George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 Nats RC Scale/Wischers Continued page 55 thieves stole airplanes equipment car Quality Inn parking lot Taken Ralphs 13-year-old Windecker Eagle white gold number 15 Webra Speed 60 engine top wing A-scale Fokker D-VII wing lozenge camouflage pattern masked sprayed two-month period concentrated work Also taken fuselage Dick Allens Fokker Triplane Ralphs flight box also other valuable electronic equipment items stolen cars flew RC Scale event owe gratitude director Bob Underwood two daughters Ann Cathy spent four days tabulating scores Flight line operations kept smooth motion Dave Sally Brown site Ron Hesseibrock other thanks also Continued page 138 dli 1 1 U WY N2 OM URUWN JR CAMIIOLLL EASYBU COVERITE cox DUBRO ILT MODELS ENYA- FAI FLYLINE FOX GOLDBERG GOLDEN AGE REPRO IGENE DUBOIS GUILLOW- K&B K&S L R MRC OS MAX PACTRA PECK-POLYMER PERFECT R/N MODELS SEAGLEN SIG STERLING- SULLIVAN SUPER TIGRE TAFFINDER TELCO TOP FLITE- TREXLER WILLIAMS & OTHERS ESTES MODEL ROCKETS Send 5100 Cah Cheek Stamp 44 page tabloid nice DISCOUNT Caialog 900 illustratIons over 700 Kits choose MAILOADER PHONEORDER IN STORE PENN VALLEY HOBBY CENTER 837 WKain t Landml.1a49446 L BOEING F4B2 90 Wingspan DOUGLAS 025C 80 Wingspan F/W FW5G Stosser 1035 Span WACO/YKS-6 -99 Wingspan RYAN S-C -112 Wingspan T-28B 102 Wingspan STEVENS AKRO -100 Wingspan WATERMAN ARROWBILE 92 Span MAMMOTH SCALE PLAN7 CESSNA 180 108 Wingspan CURTISS P400 102 Wingspan BERLINER/JOYCE P-lB 1025 PAZMANY PL-4 105 Wingspan F/W FW44J Stieglitz 895 Span DOUGLAS AiN Skyraider 120 SHOESTRING 95 Wingspan FBF HELLCAT -98 Wingspan Plans mailed air rolled heavy-duty tube P40 T28B Skyraider Hellcat Stevens Acro $3300 others $2400 Please add $500 postage handling California residents add 60/0 sales tax Overseas orders add $1200 air postage MAMMOTH SCALE PLANS 3351 Pruneridge Ave Santa Clara CA 95051 244-5814 November 1985135
Edition: Model Aviation - 1985/11
Page Numbers: 42, 43, 135
with dozens details support greatest areas assistance allow 1985 Nats theme airplane Ken Flag brs Gee Bee Model Y Senior Sportster fly parked Nats area week long plane tremendous drawing card thousands pictures taken display particularly appropriate since nearby City Springfield home Gee Bee racers during Thirties contrast 1983 RC Sailplanes flew almost trouble-free over four days compe tition 1985 Nats Soaring scene few problems local paging system inter ference shut down frequency Another day rain followed day wind Ragardless tremendous amount flying done Davey retrieval winches 985NATSY 985 NA TS Y I985NATS down Free Flight continuedespecially FF Scale also much disbelief Wakefield models seen achieve maxi mum duration flights rain Although some complained about continuing downpour took stride FF Scale contestants fact asked whether wanted quit go agreed keep flying Aside two days unhappy weather midweek flying conditions mostly great Nats started right time first Sunday morning RC international class Pylon Racing finished early week later RC Scale Sunday afternoon Because Westover site permits Free Flight Control Line Radio Control events flown within area less mile square skies Continued Da2e 134 blamed some launching prob lems 1984 performed beautifully negated need usual line-retrieval vehicles manpower past Providing separate sites RC Sailplanes Helicopters helped both events get flying would otherwise have possible Helicopter event also tremendously helped year under direction Horace Hagen recruited good crew run events too some rain wind problems got flying necessary finish schedule Likewise Soaring Event Director Jeff Troy recruited large crew run events excellent fashion Most amazing rain day see Free Flight events proceeding scheduled Control Line RC events Westover shut Left AMA Nate Expo featured Industry exhibits static display models technical seminars addition Swap snop ana model engine collectors get together Chicopee Quality Inn near WestoverAir Force Base Right Travis McGinnis stand ing conducts Nate Expo seminar FAI RC Aerobatics Otheractivities included National Free Flight Society Symposium talks newsletters noise reduction battery care videotaping years Nate chock full sights sounds experiences Radio Technique George IL Myers ABOUT 900 TRANSMITTERS proc essed 1985 Nats Helicopter radios predominantly PCM Pattern radios about 50% PCM 50% other AM FM Pylon Sailplane about 70% AM very few PCM Radios Scale about 85% old AM balance split between new AM FM Interference problems minimal due Contest Directors plan ning anything else Jeff Troy 2A-min walk set up between Sailplane launch site landing circles Result tired feet no intermod problems Pylon Pattern Scale used frequency groupings avoid ed usual problems Result very few crash es practically due pilot error result some kind failure cement truck dispatcher located iii Spring field 1983 active 7216 Blu/Wh expected addition Bill Hershberger detected new pocket pager 72320 Pur/Wh Sailplane site Monday morning about same time discovering Helicopter site 12 miles away police radio 7564 Gn/Wh no problem heard no terferences new RC channels reported could verified independently George P Steiner processed contes tants transmitters through custom-built scanner/tester separating out interesting ones careful inspection Hewlett-Packard equipment set up programmed Dan Kahn operated Bill Hershberger found couple sets badly need repair/retuning Pete Waters District VII VP proprietor Kraft Midwest Paul Holsten Ace R/C Inc set up repair shop room Quality Inn fixed problems found though some Ace Pro-Line Kraft transmitters thanks got efforts some clot broke room stole two Petes transmitters supplies including about 150 crystals person believed thief later apprehended Chicopee police Another transmitter charger stolen lobby L-R Bill Hershberger George P Steiner George M Myers members AMA Frequency Committee volunteered work 1985 Nate discuss what learning computer-controlled Hewlett-Packard Spectrum Analyzer Contestant radios tested collect information building Frequency Committee data base 42 Model Aviation 985 NATS 985 NATS V I985NATSM Quality Inn know about have no way identifying Modelers must unite rid themselves kind parasite basic reason having HewlettPackard equipment Nats build up new data base Frequency Committee might able define exactly what needed produce satisfactory narrow-band RC system tested both trans mitters receivers rained Out important receiver data base collec tion activity Wednesday remaining info voluminous report will have come later did learn newest equipment PCM mainly has fantastically good perfor mance Overall clear recent trans mitters both AM FM very good Likewise receiver front ends IF strips excellent place work needed signal detector section Present FM detectors too responsive AM signals may spread spectrum technique often mentioned Jim Oddino will necessary spread spectrum instead transmitting 1 0 digital informa tion 1 has pattern can recog nized Likewise 0 Consequently receiver can identify valid information its characteristic patterns spread spectrum can made solve intermod other inter ference problems Id like see someone Unfortunately FCC cool spread spec trum right now called upon investigate inter mod problem Pylon starting line Put ting same planes pilots transmitters same configuration starting line location near ready boxes quickly showed no problem site Moving out starting line repeated test problem returned fix simple separated planes 3 ft between wing tips using something like 10 ft problem went away main change previous two days racing runway gotten wet overnight ap parently improved coupling between receivers various airplanes receiver also low-power transmit ter Under right conditions like wet run way receivers can affect another receiver testing George Steiner Bill Hersh berger doing Quality Inn showed older receivers radiate lot newer designs Pylon planes seem use lot older receivers adds up Just safer CD also reset matrix no 38 40 42 type group ings No problems 1983 Springfield first Nats new RC channels About half transmitters used new channels got taking advantage Futaba Airtronics $10 swap offer quickly matched some way other manufacturers Virtually transmitter AM type no frequency-related problems did have problems ce ment truck dispatcher 72160 police radio 75640 nothing new channels pronounced success Reno 1984 another matter entirely lot new FM sets made appearance setups crowded especially Sailplanes Intermod other problems rampant FM got black eye So did AMA Nats year showed use head get good results AM FM PCM worked well together long elementary precautions about channel usage flight line separations observed three Nationals showed no interference new RC channels leads right reader letter Dear George .. confused point September 1983 MA state havent found interference new channels law shouldnt any. Back April 1985 MA stated Another reason FCCs decision expected some channels some locations would interfered licensed Primary Users right what kind Primary User interference up against William E Stodgell Jefferson City MO really like hear readers read column carefullyand think Both right Bill have exclusive use new RC channels also Secon dary Users must accept interference Primary Users case such interference can come Manufacturers Radio Service MRS Personal Radio Service PRS trans mitter operating even-numbered fre quency 10 kHz away RC channel As example Empire Paging transmitting 300 watts 72800 MHz top Empire State Building could interfere use RC5O 72790 MHz New York City area fact dont keep running people fly 8 10 miles Empire State Building RC5O ill effect reason Empire Paging transmitter Continued page 135 November 1985 43 ADove iypicai osciiiogram 05 RM iranamissur anowing ma muuuiaiiun aIoakJanu mci trouble FM receivers Below Atypical osci Ilogram receiver local oscillatorfundamental frenuency Nate nbsence modulation Such testina may lead reliable RC systems BYRON flRIGINALS bt 9 6o, SIlO Ph ii Full Line Catalog glance through catalog will prove Byron Originals recognized quality world over since picture worth thousand words have packed catalog full color black white photos highly descriptive illustrations well Youll pleased see new products improvements have joined family scale aircraft propulsion systems related accessories talk about value dollars Check factory direct prices competitive pricing industry ts exclusive accessories standard hobby items such finishing materials glues Dont delay Order Byron Originals catalog today Simply send $300 Byron OriginalsePO Box 279Ida Grove Iowa 51445 Set Standards Model Aviation already plans well underway 1986 event currently scheduled July 27 August 3 Lake Charles Louisiana site 1974 1975 1978 Nats special schedule being considered help celebrate AMAs 50th anniversary next yearand expand participation AMAs non-competitive membershipby possible insertion two three days fun flying middle weekend what may develop two-week Nats later now enjoy glow 1985s success look putting together bigger better event 1986 FLYING NEAR AIRPORTS BE CAREFUL PROTECT YOUR RIGHT TO FLY Nats Radio Tech/Myers Continued page 43 brand new carefully malntained peak ef ficiency doesnt waste power slopping over RC 50 doesnt belong Thats great us another place another time might lucky clear now Thanks writing George M Myers 70 Froehlich Farm Rd Hicksville NY 11801 Nats RC Scale/Wischers Continued page 55 thieves stole airplanes equipment car Quality Inn parking lot Taken Ralphs 13-year-old Windecker Eagle white gold number 15 Webra Speed 60 engine top wing A-scale Fokker D-VII wing lozenge camouflage pattern masked sprayed two-month period concentrated work Also taken fuselage Dick Allens Fokker Triplane Ralphs flight box also other valuable electronic equipment items stolen cars flew RC Scale event owe gratitude director Bob Underwood two daughters Ann Cathy spent four days tabulating scores Flight line operations kept smooth motion Dave Sally Brown site Ron Hesseibrock other thanks also Continued page 138 dli 1 1 U WY N2 OM URUWN JR CAMIIOLLL EASYBU COVERITE cox DUBRO ILT MODELS ENYA- FAI FLYLINE FOX GOLDBERG GOLDEN AGE REPRO IGENE DUBOIS GUILLOW- K&B K&S L R MRC OS MAX PACTRA PECK-POLYMER PERFECT R/N MODELS SEAGLEN SIG STERLING- SULLIVAN SUPER TIGRE TAFFINDER TELCO TOP FLITE- TREXLER WILLIAMS & OTHERS ESTES MODEL ROCKETS Send 5100 Cah Cheek Stamp 44 page tabloid nice DISCOUNT Caialog 900 illustratIons over 700 Kits choose MAILOADER PHONEORDER IN STORE PENN VALLEY HOBBY CENTER 837 WKain t Landml.1a49446 L BOEING F4B2 90 Wingspan DOUGLAS 025C 80 Wingspan F/W FW5G Stosser 1035 Span WACO/YKS-6 -99 Wingspan RYAN S-C -112 Wingspan T-28B 102 Wingspan STEVENS AKRO -100 Wingspan WATERMAN ARROWBILE 92 Span MAMMOTH SCALE PLAN7 CESSNA 180 108 Wingspan CURTISS P400 102 Wingspan BERLINER/JOYCE P-lB 1025 PAZMANY PL-4 105 Wingspan F/W FW44J Stieglitz 895 Span DOUGLAS AiN Skyraider 120 SHOESTRING 95 Wingspan FBF HELLCAT -98 Wingspan Plans mailed air rolled heavy-duty tube P40 T28B Skyraider Hellcat Stevens Acro $3300 others $2400 Please add $500 postage handling California residents add 60/0 sales tax Overseas orders add $1200 air postage MAMMOTH SCALE PLANS 3351 Pruneridge Ave Santa Clara CA 95051 244-5814 November 1985135