[Yaesu] FT920 half Power

[Tim Moes]

Hi Tom,

 My experience with the Ft-920 is losing driver transistors when the power 
drops to 30-40 watts. If it is getting real hot you have a shorted MFF255 or 
the drivers which I think are a 2sc3133. Check on the base of each 
transistor and see what the voltages are in tx and rx. In rx the base should 
not have any voltage and in tx it should have around .7 volts. You may want 
to look real close at the resistors in the final unit and this may point to 
which transistors are bad also.

TNX... Tim  wd0fkc
www.midwest-technical.com
----- Original Message ----- 
From: "DL7PP" <DL7PP at HFDX.DE>
To: <yaesu at contesting.com>
Sent: Tuesday, September 19, 2006 12:50 AM
Subject: [Yaesu] FT920 half Power


> Since yesterday my FT920 produces only abt 30-40Watts out.
> The Chassis ( on the amp side )gets very warm without transmitting.
> Is one of the amp transistors MRF255 damaged?
>
> With best regards
> Tom
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