[amsat-bb] Re: KLM 2M 22C problem

Franklin Antonio antonio at qualcomm.com
Tue Feb 17 20:21:09 PST 2009

At 05:53 PM 2/17/2009, jeff kb2m wrote:
>So, does anyone have any experience successfully rebuilding, or 
>finding a suitable replacement for the phasing harness board assembly?

This is a common problem.  The traces etch away.  ...especially if 
you leave the 12V turned on, ie relay energized, when you're not 
using the thing!  The board is not well protected against 
weather.  Moisture on the board conducts some electricity and just 
etches the traces away over time.  Just clean up the board and solder 
some wire on top of the traces, or where the traces usta be.  You 
won't harm anything by soldering some wire on the board.  The 
dimensions of the wire you'll add are small relative to 2M 
wavelength, so won't cause any degradation, detuning, etc.  I had to 
replace the relay once too.

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