Galaxy DX 979 Service Manual

Also see for DX 979: Owner's manual Service manual

Contents

Galaxy DX 979 Service Manual Manual pdf 3 page image

- 2 -1.0 GENERALModel DX 979Channels 40Frequency Range 26.965 – 27.405 MHzEmission Modes AM/USB/LSBFrequency Control Phase Lock Loop (PLL) synthesizerFrequency Tolerance 0.005 %Frequency Stability 0.001 %Operating Temperature Range -30°C to +50°CMicrophone Dynamic PTT, 500 ΩInput Voltage 13.8V DCAntenna Connector UHF; SO239Dimensions 7 1/4”(W) x 9”(D) x 2 1/4”(H)Weight 3.5 lbs.1.1 TRANSMITTERRF Power Output AM: 4W; USB/LSB: 12W PEPRF Transmit Modes AM/SSBModulation High and Low level Class B, Amplitude Modulation:AM and SSB.Spurious Emissions - 60dBCarrier Suppression - 60dBAudio Frequency Response 300 to 2500 HzAntenna Impedance 50 OhmsOutput Indicators Meter shows incoming signal strength, RF outputpower, SWR and AM Modulation level. TransmitLED glows red when transmitter is in operation.1.2 RECEIVERSensitivity For 10dB S/N (AM/ SSB) AM: < 0.5 uV ; USB/LSB: < 0.25 uVIF Frequency AM: 10.695 MHz 1st IF, 455 KHz 2nd IFImage Rejection - 50dBAdjacent Channel Selectivity - 60dBRF Gain Control 45dB adjustable for optimum signal receptionAutomatic Gain Control (AGC) Figure Of Merit 100mV for 10dB Change in Audio OutputSquelch Adjustable; threshold less than 0.5μVNoise Blanker RF typeAudio Output Power 2.5W @ 10% THDAudio Frequency Response 300 to 2500 HzBuilt-in Speaker 8 Ohms, 4 WattsExternal Speaker (Not Supplied) 8 Ohms, 4 Watts(SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE)DX 979CHAPTER 1SPECIFICATIONS