[Elecraft] 10/12M Low Output Question

[Leigh L Klotz, Jr.]

Thank you Eric and Mychael.  Unfortunately, I seem to have mistaken the 
problem - I have problems at 20M and up (and a different dip at 4MHz).

My T2 looks fine and was already off the board but I raised it a bit 
more with the green tuning tool, and re-peaked the 10M L and 12M C.

I have done a full sweep of W and A vs F and found that I have low 
output on 20 meters and higher, and an anomaly at the top of 75 meters.

See http://wa5znu.org/log/2004/11/k2-power.html for a graph and table.

I get 10W out for 2A on 14.0MHz and 5.8W out for 1.68A at 14.35, into a 
dummy load right at the BNC, as measured by the KAT2.  17M is about the 
same but it goes down from there.

The 75M dip could be something else, as the current is high there for 
its low output.

I guess my next step is a full-band re-alignment of the BPF followed by 
signal tracing with the RF probe as Don recommended on another post.

Leigh.

On Tue, 9 Nov 2004 7:40 pm, Eric Swartz - WA6HHQ, Elecraft wrote:
> High TX current points to the LPF or output transformer. Low TX current 
> points to T2 or low drive from the BPF filter.