Udo,
If you check the block diagram of the K3 you should see the area where
the problem is located (page 76).
Does the main have the same response as the subRX if you use the RX ANT IN?
If so, there is a problem with either the T/R switch or the Low Pass
filter area.
If the main RX response is still not the same as the subRX when using
the RX ANT IN, then the problem is in the main receiver itself.
73,
Don W3FPR
On 4/30/2016 5:57 PM, Udo Langenohl - DK5YA wrote:
Gents,
I had another test session today with my K3 and here's what I've done
and what happened:
1. I've checked all the test points recommended by Elecraft. No issue
found, all stages are working, there's noise increasing on each test
point at the Main RX.
2. Fired up my signal generator again and started on the Main RX with
a signal on the following frequencies and with these results:
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