JUST TO THE LOWER LEFT AND RIGHT OF THE IC, YOU WILL SEE THE MAIN PIN CONNECTORS. GM600/GP600/MCX600/PTX600 Trunk/Conventional MPT ELN6086..
Updating astro spectra flashcode
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Pour modifier votre IC-290 vous avez besoin du sch+?? September 5, 1998 - KC2AEIMotorola Software Last update: 03/04/2016 NOMENCLATURE: ARIANE: GM350, GM600, GP600, GM950, GM950PLUS, GM1200E WARIS PORTABLES: MINNOW-POPULAR-PREFERRED: GP644, GP688, GP346, (GP329PLUS), GP386, (GP339PLUS) LAZARUS-POPULAR-PREFERRED-ATEX: GP640, (PTX700), GP680, (PTX760), GP320, GP340, (GP329), GP360, GP380, (GP339) PRIME: GP1280, (PTX780) WARIS MOBILES: MPT: GM640, GM660, (MCX760), GM1280, (MCX780) & DATA BOX DATABOX-CHA, CHC, CHD: GM300 SERIES: GM340, GM360, GM380 PLAIN: GM340 PREFERRED: GM360, (GM339) PRIME: GM380, (GM399) MARLIN , MARLIN PLUS: CM340, CM360 GUPPY AND PIRANHA: CPXXX 600 Series NPS R Network Programming Software for: GM600/GP600/PTX600/MCX600 Trunk/Conventional MPT. DOS version GM600/GP600/MCX600/PTX600 Trunk/Conventional MPt .
s de i C3, remplacer le condensateur C55 de 1n F +?? REMOVE THIS DIODE AND CAREFULLY RE-bass EMBLE THE RADIO(WATCH THOSE FACEPLATE PINS!! AS FAR AS I KNOW, YOU DO NOT HAVE TO RESET THE MEMORY TO MAKE THE MOD WORK( I HAVE 70 OUT-OF-BAND MEMORIES STORED, ALL OF THEM WORKED WITHOUT RESETTING THE UNIT!!!!!
Okay, so I already saw the mod for the V8000 to expand the TX from 136-174, however, I heard there is a mod to expand the RX to recieve aircraft frequencies, is this true, if so does anybody know how to do it?
Transceiver frequency response after modification: better frequency balance and broader bandpass.
PULL THE FACEPLATE STRAIGHT OF THE BODY WITHOUT TILTING IT (YOU RUN THE RISK OF BENDING THE PIN CONNECTORS BEHIND THE FACEPLATE). STEP 1: HOLD DOWN THE SECOND AND THIRD FRONT FUNCTION BUTTONS WHILE TURNING THE RADIO ON. STEP 2: CAREFULLY REMOVE THE LARGE TUNING KNOB AND REMOVE THE TWO HEX SCREWS THAT HOLD THE FACEPLATE ON. No connection View from cable side of plug IC-290 Mod - Enhance SSB audio quality French language below On strong signals (59+) the SSB demodulated audio is affected by distortion. This capacitor acts only in transmitting low frequency if your voice is too deep. This will add an emitter feedback to reduce distortion in SSB and FM. I did those modifications to improve the quality of my transceiver used in short-wave band with a transverter. To compare improvements, I checked the full frequency response of the receiver: Load up a DSP software SPECTRAN that makes FFT on audio signal, average the display with a factor close to 16. Cut the emitter track of Q29 to add a 150 Ohms resistor in series with the (C157 R188) couple. To modify your IC290, you need the schematic diagram and layout plan of the device. (SPECTRAN: Transceiver frequency response before modification: too much emphasis on high frequencies and low frequency attenuation. On weak signals, the noise coming from the SSB demodulator can be improved for a better S/N ratio. You will see the audio response of your transceiver.