[Elecraft] (K3) KPA-250 (sort of)

[Edward R. Cole]

After quite a bit of modification&dickering with an open-frame dc 
relay that I had hoped would work as TR relay, it appears it needs to 
be inside a totally shielded enclosure.  I'm getting feedback into 
amp thru the relay that is causing it to generate RF without drive 
(oscillate).  I need a relay that can be included inside the 
amplifier enclosure so probably will investigate some HD SPDT pcb 
relays and separate the input relay from the output relay.  Amp is 
running well with just input and output coax lines.

So I checked into the Elecraft SSB Net with the barefoot K3/10 today 
(14w).  I did use the new coax lines that will serve the amp and the 
QRO tuner (Drake MN2000).  Drake power meter is generous when 
compared with my Bird43 (with 500H element).  New stations block diagram:
http://www.kl7uw.com/2012_Station.jpg
I will post more info on the amplifier here:
http://www.kl7uw.com/HF-300PA.htm

Got to run the snowblower so my wife can get thru the 2-foot snow 
drift to the Sunday paper!


73, Ed - KL7UW, WD2XSH/45
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