I sort of doubt if the 89 and other late Alphas use a Jackson drive.They
sacrificed price for quality in several components starting in the 80's.
Odds are its a clone from OEP as are in all other domestic amps.
Carl
KM1H
----- Original Message -----
From: "Paul Christensen" <w9ac@arrl.net>
To: "Amps" <amps@contesting.com>
Sent: Monday, November 19, 2012 12:16 PM
Subject: Re: [Amps] Best Alpha amp
It sounds like it was a defective drive. These are common Jackson
Brothers' drives with two mounting forks. Two tapped/threaded holes on
the outer drive are used to mount the dial legends. Changing them is an
easy job once you find the drives; I've done it twice on the 86 models.
Paul, W9AC
----- Original Message -----
From: "Bill Turner" <dezrat1242@yahoo.com>
To: "Amps" <amps@contesting.com>
Sent: Monday, November 19, 2012 10:25 AM
Subject: Re: [Amps] Best Alpha amp
ORIGINAL MESSAGE:
On Mon, 19 Nov 2012 08:07:53 -0700, Paul wrote:
My new (to me) 89 also developed vernier slipping and tightening the
setscrews solved the problem.
de Paul, W8AEF
REPLY:
I wish mine had been that easy. In mine it was the friction of the
vernier
wheels themselves. I tried flushing out any possible oil or other crud
with
solvent, but no luck.
73, Bill W6WRT
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