[1000mp] mkv Finals burned out

[RJD]

Are you using Class A to excite your amplifier?

-----Original Message-----
From: 1000mp-bounces at mailman.qth.net [mailto:1000mp-bounces at mailman.qth.net]
On Behalf Of Skip Caswell
Sent: Saturday, February 19, 2005 03:28
To: All about Yaesu 1000mp
Subject: Re: [1000mp] mkv Finals burned out

I was wondering how the finals were burned out.  I have not seen very many 
posts for that problem.  I run my MK 5 at high power for long periods of 
time and thus far, knock on wood, have not had a problem.

Skip KE9L

----- Original Message ----- 
From: "Scott Galbraith" <scottg at n3ok.com>
To: "All about Yaesu 1000mp" <1000mp at mailman.qth.net>
Sent: Friday, February 18, 2005 6:35 PM
Subject: [1000mp] mkv Finals burned out


> *This message was transferred with a trial version of CommuniGate(tm) Pro*
>
>
> Well, I have managed to burn out the final transistors in my MkV for the
> second time in
> less than a year. Little frustrating that a rig of this quality, cost and
> abilities did not
> have any type of thermal protection designed in to it.
>
> Anyway, can anyone advise how difficult it is to replace the final
> transistors? They,
> of course, are not inexpensive and with that, repair labor and shipping
> costs, the last
> incident cost over $800 to repair. Would like to avoid that this time if I

> can.
>
> Also, does anyone have any mod circuit available to provide thermal 
> protection?
>
> Thanks,
> - Scott
>
> -- 
> 73 de Scott Galbraith
> N3OK, Frederick County, MD
> FM19ji
> ARRL, QCWA 30013, GERATOL 2198, PVRC
> NAVMARCORMARS - NNN0OPY, NNN0GAW
> National Communications System SHARES
> scottg (at) n3ok.com
> nnn0opy (at) navymars.org
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