Icom IC-820H (IC 820 H IC820H) transceiver mods reviews software and diagrams

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Kenwood Midland Yaesu Alinco Icom Other

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Ham resources
Propagation: Sporadic E skip (Es) Backscatter Tropo Meteor Scatter (MS) F2 Skip Aurora Trans-equatorial scatter (TE) Lightning scatter (LS)

Icom IC-820H (IC 820 H IC820H)

Programming interface schematics for Icom:
Programming software for Icom IC-820H (IC 820 H IC820H) :
PDF User Manual for Icom IC-820H (IC 820 H IC820H) :
PDF Service Manual with schematics for Icom IC-820H (IC 820 H IC820H) :

Mods for Icom IC-820H (IC 820 H IC820H) :
    Icom IC-820H (IC 820 H IC820H) Leistungsregelung
    Icom IC-820H (IC 820 H IC820H) extended receive/transmit modification
    Icom IC-820H (IC 820 H IC820H) cross band repeat modification
    Icom IC-820H (IC 820 H IC820H) display board
    Icom IC-820H (IC 820 H IC820H) Test results
    Icom IC-820H (IC 820 H IC820H) 1750Hz on IC-820, modif

Icom IC-820H (IC 820 H IC820H) technical specifications : Icom IC-820H (IC 820 H IC820H) technical specifications

Icom IC-820H (IC 820 H IC820H) cross band repeat modification

Add a diode on the blank position between D27 & D28 on the Logic Board. The part is 1SS353 P/N 1750000390.

After hardware modification

Note: If you removed Diode D25 or Diode D26 in the first modification then it can be used in the second modification as it is the same part.

CB Equipment
President Midland Uniden Zodiac

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Beko Icom Alinco Drake Yaesu Daiwa Collins Kenwood DanAmps Ameritron Autophon Eto/Alpha Command Technologies E.F.Johnson Dentron Radio Co.

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PMR446
Sommerkamp FreeQuency Goodmans Kenwood Lafayette President Binatone Motorola Multicom Albrecht Maycom Topcom Xtreme Ondico Telcom Maxon Vertex Zodiac Yaesu Cobra Alinco Icom Alan ITT




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