Icom Ic-7400 Mods Online

Do you have a unique mod for the IC-7400? Share your tips in the comments below. For schematic references, download the ICOM IC-7400 Service Manual from the ICOM Japan website.

: A popular mod involves wiring the fan to run slowly and silently at all times, with speed still increasing automatically during transmit to prevent heat buildup QSL.net . icom ic-7400 mods

The stock preamp on 144 MHz is okay, but it adds noise. Serious VHF operators want to bypass it entirely and use an external mast-mounted LNA. Do you have a unique mod for the IC-7400

: For extreme precision, some operators modify the master oscillator to sync with a GPS-disciplined oscillator (GPSDO) QSL.net. icom ic-7400 mods