What is the selectivity on the SW-4 and SW-4a? Are they exactly the same radio,
because they seem to be?
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I have a Drake 2B that I refurbished and re-aligned a few months ago,
and it plays pretty well on all bands. The only thing that seems a
little strange is when the passband control is set to "1", and the
preselector is off-tuned or if there is no antenna connected (low
atmospheric noise), it so
Paul -
Same result if you unplug the MUTE cable at the receiver? FAST and/or
SLOW the same?
Possibly bad V1, V4 or V5, unplug one at a time. Does S-Meter go up to
full scale? Voltage at TP-2?
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supp
My B-line has been working but today that after hooking it back up
(was working on a TR-4) I noticed that the R-4b was not muting or
going into Standby.
In standby or ext mute (w/o short in RCA Mute)audio is distorted
RF Gain only raises S Meter to 20 over or so.
Something seems to have changed s
14feb, 0156 UTC, X 2.2 from 1158: has been active. 14 Feb 10 C class, 1 M
6.6, 1 X 2.2 with R-3 Radio Blackout. Should get some Northern Lights out of
this one! Last X 2006...
73's
ken
AB1JZ
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