[Elecraft] K1 Receiver Sensitivity Issue.

[Les Garwood]

Dear Fellows,

I Bought a K1 kit at a ham fest several years ago  (SN 02197) and recently
finished the receiver section.  Although audio is strong, as evidenced by
the hiss, I have nearly no signal on all 4 bands.
I can pump strong rf into it and hear a good side tone/bfo but not
strongly. Once, I heard a very faint CW station that was loud on my big
rig. But no others.
>From the best of my repeated testings, all voltages and resistances
provided in the manual match.  I have not built an rf probe for my DMM yet
but will.  However, I also used the signal generator kit from Elecraft
(the KXGI?).  It is only weakly audible too, and only on the 50 microvolt
setting.  The AGC setting has no effect.  The attenuator kills the weak
probe signal when on.
One post I found after scouring the  Net spoke of a very similar problem
that turned out to be a bad 2N7000, in the A Preamp stage,  but I can't see
how that would affect signal sensitivity, only audio gain.
I also put a scope on pin one and pin 4 of U1, the Receiver Mixer.  The
relative voltage was 3x higher on pin 1 than on pin 4.  I would at least
have expected gain instead.

Any comments appreciated.

73
Les
KE7SLX