Garey Barrell <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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Frank -
I haven't worked on that many 2-Cs, but it sure sounds like either your
MUTE shorting plug "isn't" or possibly the contacts on S-3B aren't
making contact! What you're seeing is exactly what I'd expect to see
if the MUTE shorting plug was left out. The S meter can drift around
with the AGC off, and often moves upscale.
This must be the day for weird Drake problems with Rob's three
apparently bad final tubes and your "non-shorting" MUTE plug!!
73, Garey - K4OAH
Atlanta
Drake B & C-Line Service CDs
<http://www.k4oah.com>
francobevi francobevi wrote:
"francobevi francobevi" <[EMAIL PROTECTED]> made an utterance to
the drakelist gang
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Hi guys!
I am trying to repair the agc of a Drake 2-C.
First I notice that in standby the s-meter goes up S9+40, while
setting the function switch to ON (or external muting with the muting
plug) the s-meter goes to S1 but it moves up to about S5 with the AVC
in OFF position when strong signal are heard (that's strange should it
really move or stay fixed?? on strong signals distortion is heard). In
AVC postion SLOW or FAST the S-Meter goes to S9+40 as in postion
STANDBY and nothing is heard.
I measured the voltages at TP1: in position AVC OFF it is -1.35 Volts,
and in position AVC SLOW or FAST it is something like between -15 Volts.
I was thinking that the wiring from the function switch to the AGC
section could be wrong but before making any change I would like to
know what you think it could be.
73, Frank
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