Would appreciate any help with an R4-C that works just great with the exception
of the 15 meter band. can hear the calibrator weak that's about it, no signal
from nearby transmitter or any other signals, preselector does not seem to make
much difference. Many Thanks, DAN,
Thanks to all who replied to my post this morning having to do with a dead band
on 15 mtrs on my R4-C. I found it to be the 32.1 mhz crystal in the 15 mtr
slot. Had a junk box 29.010 10 mtr transmit xtal, put that in the slot, and
while the dial was off it still got me into the 17 mtr band
Dan,
If it were me, not being an expert, I would start by sparingly applying DeOxit
to switch contacts, and look into the 15 meter crystal that might have aged
beyond being usable.
73,
Evan, K9SQG
-Original Message-
From: K3XR k...@comcast.net
To: drakelist
A few weeks back I wrote about PBT levels in SSB/AM modes. It would change
S-Meter levels depending on adjustment of the PBT. I ruled out the 4NB board
by removing it..no change.
However when I removed the bottom cover almost 6 S-Units of PB feedthrough were
reduced and performance was
Have you been able to remove the NB-4 and bypass it with the jumper plug as
yet? I have experienced this problem and I have found the NB-4 to be the
culprit. You may be embarking on a process to eliminate symptoms rather than
fixing the problem.
JB
From: drakelist-boun...@zerobeat.net
Check and make sure that all the shielding underneath for the 3rd mixer is
intact.
That circuit is very sensitive to stray signals and noise. You might also want
to try a different 6EJ7 in there to see if it changes anything.
73,
Steve Wedge, W1ES/4
Time flies like an arrow; fruit flies
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