Icom IC-910H (IC 910 H IC910H) transceiver mods reviews software and diagrams

   
 
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28 March 2024, 14:21 UTC 


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Icom IC-910H (IC 910 H IC910H)
IC-910H
Programming interface schematics for Icom:
Programming software for Icom IC-910H (IC 910 H IC910H) :
PDF User Manual for Icom IC-910H (IC 910 H IC910H) : Icom IC-910H Instruction Manual
PDF Service Manual with schematics for Icom IC-910H (IC 910 H IC910H) : Icom IC-910H Service Manual, diagrams

Mods for Icom IC-910H (IC 910 H IC910H) :
    Icom IC-910H (IC 910 H IC910H) Sensitivity
    Icom IC-910H (IC 910 H IC910H) Improved SLOW/FAST AGC response selection
    Icom IC-910H (IC 910 H IC910H) power protect software overide
    Icom IC-910H (IC 910 H IC910H) mods
    Icom IC-910H (IC 910 H IC910H) Expanded functions

Icom IC-910H (IC 910 H IC910H) technical specifications :  Icom IC-910H (IC 910 H IC910H) technical specifications



Icom IC-910H (IC 910 H IC910H) Improved SLOW/FAST AGC response selection

The IC-910H offers a fast or slow AGC response selection from the front panel, this selection isn't very effective, and in fact AGC is always 'fast'.... In order to improve the selection of the slow response (eliminating the AGC 'pumping' under SSB operation), the R/C timing components of the AGC circuit must be adapted as follows:

  1. Remove power, open top and bottom covers of rig

  2. on the underside, locate the MAIN UNIT PCB (it is on your right side, with the front panel facing to you, and doesn't need to be dismantled)

  3. replace (or just solder as piggyback on) R312 and R914 (22k original value) by 2.2 k resistors, SMD or 1/16watt version.

  4. replace C910 and C306 (originally 22µF) by 47µF/16v electrolytic type

To locate these components, you will need the service manual which is downloadable from different internet sources as a pdf-document.

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