Hi Jerry,
I agree that the relatively low TX power output on 20M
originates in the KPA100 module. Did you build that
module and install it yourself? The LPA circuit in the
base K2 seems to operating normally, and your
peaking of the BPF confirms that.
If you have capability to sweep the
OK,
With a dummy load - actually a 500W Bird 30dB attenuator - the
displayed power out came up to 78W.
I tried adjusting the bandpass filter - it was already spot on. They
use one filter for 40M and 30M,
and you go back & forth between the two. It was already perfectly
peaked & tweaked.
But before that, I should redo the test with a dummy load.
Yes.
And it's not just gain decreasing with rising frequency, because it
does 92W on 15M, 76W on 10M.
First suspicion ... check the alignment of your bandpass filters.
73,
... Joe, W4TV
On 3/16/2024 11:56 AM, jerry wrote:
Hello,
I've been doing a bit of operation with my K2 lately. It really is a
joy on CW, and it fits perfectly under my big computer
monitors. But I have noticed On 40M, it does 101W out. But on
20, only 63W. This is measured with a Telepost LP-100A vector
wattmeter. The SWR is
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