[R-390] GR Adapter and Signal Generator findings

[Barry]

All this talk about the GR1001A reminds me that I need a GR 874 to BNC
Female adapter.  Does anyone know where I can get one of these?

Last night, I was playing around with the IF Gain control.  I'm not
convinced I have it set right, but I think it's pretty close.  It's about at
2/3 full CCW.  After setting it and with the radio set to 15.2mc, I
connected the signal generator through my impedance matching network and
started listening to the signal.  With the output level set to 1uV, I could
hear the modulated signal.  I began decreasing the output and could still
hear the signal as low as 0.2uV.  I realize this isn't exactly scientific,
but I was kind of surprised to hear the signal at that low level.  Also, I
didn't have the series 40-ohm or the parallel 50-ohm resistors in place yet
so I'm not sure how this works into the overall equations, but I was pleased
to be able to hear a signal that small.

I also realize there is (can be) signal leakage from the generator, but if I
turn the output down below 0.2uV, the signal is inaudible so I'm not sure
I'm hearing leakage or not.  I have the 2V output on the GR1001A plugged so
I don't think there's much (if any) juice getting out from that point.

What really surprised me was with the signal generator as my "antenna",
signals on the 9mc band came blasting in.  I've heard some signals with the
generator connected before, but not that loud.  Does this indicate the
generator could be really leaking more than I suspect?  It was pretty cool
nonetheless.

Thanks for listening to my longwinded post.

Barry - N4BUQ