[amsat-bb] Re: Replacing the 3SK121 in my ag-35

Luc Leblanc lucleblanc6 at videotron.ca
Mon Jan 4 10:58:24 PST 2010

On 4 Jan 2010 at 10:33, Yokshs wrote:

Date sent:      	Mon, 04 Jan 2010 10:33:27 -0600
From:           	Yokshs <yokshs at sbcglobal.net>
Subject:        	[amsat-bb]  Replacing the 3SK121 in my ag-35
To:             	Amsat BB <amsat-bb at amsat.org>

> Hello,
> Happy New Year to all on the list!
> I've got a replacement 3SK121 for my AG-35, and I'm looking for suggestions 
> on how to replace it? The relay coil is mounted very close. I'm curious if 
> anyone else has managed to replace the FET without removing the relay?
> Thanks for any suggestions.
> 73.
> Kyle
> K0KN
> _______________________________________________

Hi Kyle

I change one in my AG-35 just cut the legs of the fried one as close to the casing possible then just solder the new one over the legs 
already solder to the board. To avoid over-heating the coil relay just put a piece of insulating material over the coil i put a small piece 
of teflon. There is only one leg too close to the coil relay. You should have a steady hand and a magnifier with a lamp it help to avoid 
messing with your pen iron throwing melted solder all around the place.

It works for me just hope it will work for you.


Luc Leblanc VE2DWE
Skype VE2DWE


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