[Elecraft] K3 sub receiver no signals

[NH7RO]

Hi Mike; I had the same problem a number of months ago and it was so
frustrating I finally removed the sub rcvr and sent it off to Aptos.  The
guys there were very helpful as always but it came back with a perfectly
clean bill of health as they could find nothing wrong with it.

This was after I had checked and rechecked all of the cabling, configured
all the antenna settings about a million times and pulled every last hair
out of my head.  Oh, yes, all the filter settings were fine from the get-go.

When I reinstalled it after coming back from Elecraft the problem was still
there; the sub was still virtually dead as far as the signals were (the
audio level was always fine, just sounded like someone had switched in a
-20db attenuator everytime I went with the SUB on.

I believe what finally fixed it was a total reloading of the firmware and a
recalibration of the VCO (IIRC).

I also set every band's antenna selection regardless of whether or not the
band was IN or OUT to MAIN (making sure that it stayed set on MAIN every
time I checked the settings).

Finally, just when I was about to throw in the towel, the SUB came back to
life!  While I'm not 100% sure I do believe it was one of the calibrations I
performed (VCO calibtration or DSP utility) that did the trick in the nick
of time.

I have been a very happy camper ever since (despite not really knowing what
caused the snafu in the first place; it suddenly went deaf while I was
operating split and chasing a DX pileup...and oops!) and now I appreciate
this little rig more than ever.  I'm still scratching my head over it all
but unless it happens again I may never really know the hows and whys...

Reminds me of the old saying, "You never miss your signals until your
sub-receiver dies!"

Hope you get it going again right away and I suggest redoing ALL the
calibrations required when the sub is first installed---that may very well
bring it back to life.  Best of luck to you (and I know just how you feel).

73,  Jeff   NH7RO

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