Icom IC-775DSP (IC 775 DSP IC775DSP) transceiver mods reviews software and diagrams

   
 
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29 March 2024, 11:00 UTC 


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Icom IC-775DSP (IC 775 DSP IC775DSP)
IC-775DSP
Programming interface schematics for Icom:
Programming software for Icom IC-775DSP (IC 775 DSP IC775DSP) :
PDF User Manual for Icom IC-775DSP (IC 775 DSP IC775DSP) :
PDF Adjusments Procedures Manual with schematics for Icom IC-775DSP (IC 775 DSP IC775DSP) :
Schematics for Icom IC-775DSP (IC 775 DSP IC775DSP) :

Mods for Icom IC-775DSP (IC 775 DSP IC775DSP) :
    Icom IC-775DSP (IC 775 DSP IC775DSP) Mic sensitivity
    Icom IC-775DSP (IC 775 DSP IC775DSP) Increase the sensitivity on MW-band 0.5-1.6MHz
    Icom IC-775DSP (IC 775 DSP IC775DSP) Out of Band Information
    Icom IC-775DSP (IC 775 DSP IC775DSP) New product information

Icom IC-775DSP (IC 775 DSP IC775DSP) technical specifications :  Icom IC-775DSP (IC 775 DSP IC775DSP) technical specifications



Icom IC-775DSP (IC 775 DSP IC775DSP) Mic sensitivity

This modification brings up the gain of the first mic-amp to the same level on the IC-775 as on the IC-756. I use the Heil Pro-set Plus with HC-4 and HC-5 combination. After modification the mic-gain is set to 11 o clock, drive to 12 o clock with COMP on. Without compression I increase mic-gain to 12 to 1 o clock. As the first mic-amp is located before the VOX circuit also the VOX start to work with the dynamic Heil elements after modification.

The modification involves taking the whole front unit of the radio as the mic-amp is located on MAIN UNIT. The resistor that is changed is a 2mm long (short) SMD resistor and is close to other components. I think it is best to consult the service manual to find out how to get to the MAIN UNIT and to find the resistor. Do not do this modification unless you know what you are doing and know how to solder SMD components. The IC-775 is a fine radio. Do not destroy it.

To do the modification, remove the 4,7k resistor R32 and exchange it with a 10k. R32 is connected between pin 3 and 4 on IC-8 on the MAIN UNIT.



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