[R-1051] diagnosing dead bands

[David Wise]

Look deeper into the archive.  Two different people (one of them myself) documented how they got the motor out and back in.  Slightly different methods.  It can be done, and safely, but it's no cakewalk.

The motor short brings a spinning motor to a quick stop, to prevent overshoot.  It doesn't have any noticeable effect at hand-turn speed.

Dave Wise

-----Original Message-----
From: r-1051-bounces at mailman.qth.net [mailto:r-1051-bounces at mailman.qth.net] On Behalf Of paul swed
Sent: Thursday, March 27, 2014 12:15 PM
To: R-1051 Discussion Group
Subject: Re: [R-1051] diagnosing dead bands

No matter what all of the mechanics are tricky.
They also short out the motor when its not running by a relay.
Makes it really hard to turn.
The fact that you have bands above dead also does seem to point to that
region


On Thu, Mar 27, 2014 at 3:04 PM, Mark Richards
<mark.richards at massmicro.com>wrote:

> Paul,
>
> Thanks for confirming.
>
>
> I dug into the archives, reading subject lines.  And honed in on this one:
>
>     mailman.qth.net/pipermail/r-1051/2006-June/000571.html
>
> "The problem is you have a stalled motor in the Mhz synthesizer module of
> the six pack. There are two motorized things in the radio...one the turret
> in the RF deck...easy enough to check...you can watch it go round and
> round. The other is not so easy...it's a motor driven crystal oscillator
> switch. If the motor stops you will only get one band to function. "
>
> In my case, 9MHZ and above is also dead.  So I pulled the module out and
> am now puzzling how to extract the motor.  Looks to be tricky.
>
> Hopefully not dissembled in vain :)
>
> /k1mgy
>