[BC] In search of Harris SX1

[Mike McCarthy]

The same FET used in the PDM board can be used on the PA board.  Those are 
about $15 ea.  IRF350 I think was the part.  Always replace in pairs.

MM

At 09:55 AM 3/9/2009 -0400, cldube wrote
>My experience with the SX series is not if you'll need to replace 
>transistors, but when.
>I made replacements- about 2 per year and usually after severe weather on 
>these transmitters, even when new
>and very well matched to the antenna system. The transistors should be 
>replaced in matched pairs for best results.
>And these parts are no longer available from Harris nor anyone else that I 
>know of. So essentially you'll be buying a box that will eventually be 
>running at reduced power and eventually, no power out. I used to really 
>like these boxes back 15/20 years ago, but they were a product of their 
>time and
>now obsolete (also, the SX status display LED/driver chips from Texas 
>Instruments are no longer available IIRC, and they also seem to die 
>relatively frequently.)
>
>Chuck Dube