[GreenKeys] The motor start capacitor strikes back

[Nick England]

I meant fine as a replacement for the 43-48.

On Sat, Feb 24, 2018 at 7:22 PM Nick England <navy.radio at gmail.com> wrote:

> As I said in recommending these caps, they are not the correct value for
> the larger M28 motor but they have worked fine for me to replace the
> 88-108. And you cannot find anything else that will fit.
> These are NOS caps for the M33 motor and the value is also correct for the
> miniature M28 TD motor.
> I think NOS caps have a much better chance of working than old oil-soaked
> ones that have spent years cuddled up to a hot motor.
> Nick
>
>
> On Sat, Feb 24, 2018 at 4:31 PM Ethan Blanton <elb at kb8ojh.net> wrote:
>
>> Hello again,
>>
>> My NEMA ML-3R plugs are in hand, and I've wired up both the LPR and
>> LPW.  Thanks again!
>>
>> However, I'm back to motor start capacitors.  After a previous
>> exchange, I ordered some 88-108 mF motor start capacitors from a
>> surplus site.  I just cracked open the motor unit on the LXD, though,
>> and -- wah wah waaaaaah -- while the new cap is the right physical
>> size to fit under the motor, the cap in place right now is 43-48 mF,
>> not 88-108!  I don't know exactly what the situation is for these
>> synchronous motors, but I know that in other circumstances that could
>> cause the starting relay to fail to kick out in a timely fashion,
>> damaging either the motor or the starting capacitor (or both).
>>
>> So ... anyone have a source on starting capacitors of the correct
>> value?  I'm slowly putting together an order to quote from our friend
>> Paul at RTTY Electronics (containing a whole smattering of parts), so
>> perhaps I'll try that route, but I suspect surplus Teletype corp
>> starter caps aren't substantially newer than the failed caps that are
>> already in place.  ;-) I've been looking again, and motor start
>> capacitors small enough to fit under that sub-chassis still do not
>> seem to be a thing I can find.
>>
>> Ethan
>> ______________________________________________________________
>> GreenKeys mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:GreenKeys at mailman.qth.net
>>
>> 2002-to-present greenkeys archive:
>> http://mailman.qth.net/pipermail/greenkeys/
>> 1998-to-2001 <http://mailman.qth.net/pipermail/greenkeys/1998-to-2001>
>> greenkeys archive:
>> http://mailman.qth.net/archive/greenkeys/greenkeys.html
>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
>> http://comcents.com/tty/greenkeyssearch.html
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
> --
> Nick England K4NYW
> www.navy-radio.com
>
-- 
Nick England K4NYW
www.navy-radio.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20180225/c8941b55/attachment.html>