|[AMRadio] 75A4 question|
collinsradio at comcast.net
Mon Dec 26 07:35:51 EST 2011
Someone removed the 4:1 reduction drive.
Is that a round emblem or winged emblem 75A-4?
David Knepper, W3CRA/W3ST
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----- Original Message -----
From: "CL in NC" <mjcal77 at yahoo.com>
To: "AM radio" <amradio at mailman.qth.net>
Sent: Sunday, December 25, 2011 9:03 PM
Subject: [AMRadio] 75A4 question
> Hope everybody had a good Christmas. After finishing his 129X, I'm now
> starting to work on my friends round emblem 75A4. Have worked on R390's
> before but this is the first 75A4 for me. The first thing I have run
> across is the main tuning knob rubbing and having excessive lateral play.
> When I removed the knob, there is a threaded bushing on the shaft, but no
> way to anchor it. There are 2 small tapped holes on either side of the
> panel tuning shaft hole that has a brass insert, much larger than the 1.4"
> tuning shaft. Is there supposed to be a metal bracket that holds that
> shaft bushing and is attached by 2 machine screws to eliminate the lateral
> Charlie, W4MEC in NC
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