PROBLEM SOLVED.
I found a "full size" MC1350 at a local electronics store (the last one they
had, back in old storage...). Replaced it for the modified SMD-version
MC1350 I had received from Elecraft - and this fixed my sensitivity problem!
I still don't feel comfortable with the low 8V level,
Hello Kristinn,
Have you checked the value of C182, 180 pF?
I had a sensitivity problem which was caused by mounting a 1800 pF cap!
73,
Roelof, pa0rdt
K2 # 6177
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Well, I took my lack-of-sensitivity analysis to the next stage and performed
the Signal Tracing checks, as described in the Elecraft K2 Manual. Injected
the 0,14Vrms into the antenna connector when appropriate, and kept the
overload diodes (D40,D41) disconnected.
In short, the DC voltages are a
TF3KX wrote:
the IF chain. An interesting thing is that I hear this signal much weaker
in the K2 audio when I touch it to the INPUT of IF-amp U12 (MC1350) than to
its OUTPUT. In other words, that IF amp does not amplify, but rather
attenuate the injected signal. I have re-checked all connecti
Hi - I am in the process of constructing my K2 and have two problems that may
or may not be related.
Problem 1: Low, almost nonexistent RX sensitivity during Alignment II. I
can manage to copy a carrier from my MFJ antenna analyzer and I have used
this to verify that IF and input circuits are p
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