FYI for operators using the IC-970 radio. I blew my AG-25 preamp once as a result of switching the satellite mode knob while PTT was still engaged. I never tried to duplicate this action of course, but it seems the radio logic got confused during the change and the sequencer did not kill the TX power.

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Message: 1 Date: Thu, 23 Apr 2009 20:45:40 -0600 From: "Yokshs" yokshs@sbcglobal.net Subject: [amsat-bb] AG-35 smoke test To: "Amsat BB" amsat-bb@amsat.org Message-ID: 0CD166CE3BF94D2B91D05ECD6D2CCCBC@main Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original

Luc,

Thanks for the reply.

Did you have to remove the relay to replace the FET? Just curious. I've got my AG-35 down off the tower and on the bench now. The FET is so close to one of the relays, I'm pretty sure it'll have to be removed to replace the FET.. Any suggestions?

Thanks,

Kyle K0KN

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I fried my UHF one too...I order a couple from ICOM. With my very limited electronics building skills i cut the dead one leaving as much legs as possible and i resolder the replacement over the cut legs. Not elegant but quick and effective. Is this is achieving the same overall previous gain figures? that i don't know but it works.

I have another one to replace in a different type of preamp but the FET is below a lot of other components and he's flat mounted (No legs) i don't come up with a solution with this one?

"-"

Luc Leblanc VE2DWE Skype VE2DWE www.qsl.net/ve2dwe WAC BASIC CW PHONE SATELLITE