[Elecraft] KX-1 low output
Howard Zehr
zehrhj at aol.com
Sun Feb 9 13:31:54 EST 2014
When I first built my KX-1, the output was low. I installed the modification suggested by Elecraft (replacing R11 and R30) and that brought it within specs, though barely. Recently when I added the KXB3080 module, the output dropped slightly so that it was below 3 W.
I sent it to Don W3FPR and he found that the output from the DDS was low. He improved the output by paralleling a 47 ohm resister with R10, to increase the output of Q5. That did the trick, bringing the overall output to where it should be.
I thought I’d pass this on in case someone else has this problem.
Howard K4LXY
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