SB-101 LEVEL Control Problem

[Glen Zook]

Sounds like the finals are taking off.  Neutralization
is usually the "fix".  However, if you are using
6146B/8298A or any 6146W with a code date after mid
1965 then it may be impossible to neutralize the
finals or else to keep the neutralization from
drifting.

Now there are individual SB-101 units that work fine
with the 6146B family.  However, the vast majority of
them are very unhappy with that particular tube.  The
radio was designed for the 6146 or 6146A/8298.  The
6293 will also work fine.

You have tightened all of the screws, nuts, etc., that
go into the chassis.  All of the grounds in the radio
are made through these and they definitely work loose
over the years.

Glen, K9STH


--- "Gary H. Harmon, Jr" <gharmon at idworld.net> wrote:

I'm looking a friend's SB-101 and I've fixed several
problems but one remains.  All tubes check good,
switches, pots and contacts have been cleaned.  When
you put it in the TUNE position the power meter
indicates the LEVEL control is full CW.  IOWs, the
control has no effect on the output. Also, if you
activate the rig using LSB or USB, the power meter
reads as if you are in TUNE or CW.  In LSB or USB
there should only be a reading when you talk into the
microphone.  The dual pot reads and acts normal.












Glen, K9STH

Website:  http://k9sth.com


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