[Elecraft] update on K1 with no audio

[Steven J Baumrucker, MD]

Ok, here's what I know so far:

1) I can hear a hum if I touch P1
2) I can hear a hum if I touch U4 pin 3
3) I hear NO hum if I touch U3 pin 2 or 3
4) No hum or noise if I touch T2 or leads 1 or 2 of T1
5) BFO is heard precisely at 4.913 Mhz on my Gen Coverage Receiver
6) doing the "double diode" screen on Q11 and Q10...all SEEMS well.
7) all voltage checks on U2, U3, U4 are normal
8) the resistance between U3 pin 2 and 3 is a little high at 403K ohms
9) sidetone audio is perfectly normal

Still no audio out otherwise.  No white noise, nothing.  I tried hooking it
up to my outside antenna just to see if the receiver is just quiet but
there's nothing.

Does the above info lead anyone out there to a definite conclusion? :-)


Thanks for everyone's help!



--Steve
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