[ICOM] WTB: UHF Power Amp Module SC-1054 or M57788

[Paul Playford]

I have had success repairing modules that have the components laminated to a 
ceramic substrate.

It appears the substrate expands (and contracts) at a different rate than 
the circuitry and the circuit traces have a tendency to crack, creating an 
open circuit.

Found the crack(s) with an ohm meter.

I used a 150 watt soldering gun to solder a small wire to bridge the crack.

It does take a lot of heat for the solder to flow due to the heat sink of 
the module.

de Paul, W8AEF


> ----Original Message Follows----
> From: Robin Midgett <K4IDC at Comcast.net>
> Reply-To: ICOM Reflector <icom at mailman.qth.net>
> To: icom at mailman.qth.net
> Subject: [ICOM] WTB: UHF Power Amp Module SC-1054 or M57788
> Date: Fri, 29 Sep 2006 08:43:24 -0500
>
> Hi,
> I need an Icom SC-1054 UHF power amplifier module to repair an Icom 
> IC-901. It is the same as a Mitsubishi M57788. I'm seeking a organ donor 
> radio from which I can extract this part..new ones are a bit too 
> expensive.
>
> Thanks,
> Robin Midgett K4IDC