"DW Harms" <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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Brian,

Dont start replacing the PA transistors before you have made sure it is not the 
mixer! I have seen that in quite a few TR7's!
Replace it by a SRA3M-H or equivalent 13 dBm mixer and see what happens first.

VY 73, Dick PA2DW

-----Oorspronkelijk bericht-----
Van: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Namens [EMAIL PROTECTED]
Verzonden: vrijdag 27 april 2007 15:27
Aan: [email protected]
Onderwerp: [drakelist] PA Transistors questions


[EMAIL PROTECTED] made an utterance to the drakelist gang
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I have a TR7 with the wonderful "low power output especially on 10m (30w max)" 
problem.  My father (WW4HX) and I have been researching and found the best 
solution is to replace the PA Transistors.  Most places seem to refer back to 
either the Drakelist's Drakemods section or Floyd Sense's (K8AC) article but 
both suggest different sets of transistors with the exception of the predriver 
which they suggest the MRF476/2SC2166 (which is another question.. are these 
direct replacements of each other or do we need to gt the MRF476).  This was my 
great-grandfathers (Rudy Gibbs, W4HX) last rig before he became a SK so we am 
trying to keep it as original as possible.  Any guidance the list can give 
would be greatly appreciated.

Thanks,
Brian
KD4UYP


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