[Milsurplus] GRC-9 Power supply Question

[J. Forster]

I've had better success with running the current through the contacts
also, rather than just through the coil. I hook up the unit and whack it
some in various directions to get it started the first time. The high
applied voltage is enough to burn through the contact film, once a bit of
wiping action starts.

FWIW,

-John

=============


> I have been using this approach for close to 30 years, and wish I could
> claim the statistics that Al has had. About 15 years ago I picked up close
> to 50 NOS Mallory Vibrators in the box. I could not get a single one
> going,
> even after I took several apart to help them along. The contacts were just
> too far gone. I do not remember if I gave them away or just threw them
> away.
> Still, a good procedure and does work a lot of times as Al has been able
> to
> demonstrate. 73 - Mike
>
> Mike B. Feher, N4FS
> 89 Arnold Blvd.
> Howell, NJ, 07731
> 732-886-5960
>
>
>
>
> -----Original Message-----
> From: milsurplus-bounces at mailman.qth.net
> [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Al Klase
> Sent: Monday, September 20, 2010 2:53 PM
> To: milsurplus at mailman.qth.net
> Subject: Re: [Milsurplus] GRC-9 Power supply Question
>
> On 9/20/2010 1:46 PM, mac wrote:
>> .....Don't be too surprised if the vibrator for the receiver PS doesn't
>> work the first time you apply power.  Common problem requiring opening
>> the can and cleaning the contacts.....
>>
> OK, OK, You've put me over the edged, so I've put the easy solution on
> my website:
> http://www.skywaves.ar88.net/commrx/Maintenance/Waking%20Up.doc.pdf
>
> You probably don't have to open the can.  I'm about 11 for 11 on saving
> vibrators this way.
>
> In Greg's case I beleive you're working with a shunt operated vibrator,
> so just hook up to pins 1 and 7.
>
> I'm about 11 for 11 on saving vibrators this way.
>
> Regards,
> Al
>
> --
> Al Klase - N3FRQ
> Jersey City, NJ
> http://www.skywaves.ar88.net/
>
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