[AMRadio] 75A4 question


David Knepper 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 
> play?
>
> Charlie, W4MEC in NC
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