[R-390] Re: [Milsurplus] Wanted - Auto-Tune Motor for R391 Receiver

[Paul H. Anderson]

On Wed, 18 Jun 2003, Joe Foley wrote:

> If we get a better description of the motor's
> condition we can determine if it's repairable, or
> maybe parts can be substituted.
>
> Joe

I'm pretty sure Bob is missing the motor - he bought an eBay R-391 that
had no autotune motor.

Fair Radio has "similar" hamilton beach motors that are about half the
power.  They have exactly the same mounting and spur gear.  The inputs
appear to be the same.  You'd need a very slick and smoothly operating
R-391 to run it with half the power, however.  I believe these motors are
from the T-195, which has a number of autotune components.

I have several R-391's, and am still writing an article about restoring
the autotune, including the motor.  Rebuilding the motor is pretty easy.

Here are the specs that I have for the motor:

I have what appears to be several different Hamilton Beach motors that are
used in several of my R-391's: ALC-1000 28.5VDC 3100 RPM, 1/10 HP, or
ALC-1000 28.5VDC 5800 RPM, 1/15 HP electric motor.  I believe that both
have the same Collins drawing number: 230-0155-00. The motor brushes are
both Hamilton Beach part # AUG-61 (21/64 long by 1/4 wide).  The ball
bearings are two different types: 36KDD and R4FF (about $7 or $8 each).

Paul