[TenTec] ARGOSY 525 PTO DRIFT?

[Bwana Bob]

Ed:

That's excellent, very low drift. Hardened PTO grease usually causes 
frequency jumping, not warm-up drift. I had it really bad with my 
Corsair, until I rebuilt the PTO. The components were not really worn, 
it was just the grease that was causing the problem.

			73,

			Bob WB2VUF
Ed Worst wrote:
> Hi Bob,
> 
> I get about +/- 20Hz drift after a half hour of warm up from a cold start.
> I think I'll try the PTO rebuild first before modifying the circuit.  Still
> have to talk with TenTec to see what they have to say.
> 
> Tnx es 73,
> ed - k9ew
> 
> ----- Original Message ----- 
> From: "Bwana Bob" <wb2vuf at qsl.net>
> To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
> Cc: "QRP-L" <qrp-l at mailman.qth.net>; "TenTec List" <Tentec at mailman.qth.net>
> Sent: Monday, October 03, 2005 21:58 PM
> Subject: Re: [TenTec] ARGOSY 525 PTO DRIFT?
> 
> 
> 
>>Ed:
>>
>>Try different values for the temperature compensating capacitor. This is
>>  selected at the factory, but you may get better results from another
>>value. Only trouble is, N750 caps are hard to find, but I think Mouser
>>carries them.
>>
>>73,
>>
>>Bob WB2VUF
>>
>>Ed Worst wrote:
>>
>>
>>>I tried my Argosy 525 on MFSK tonight, and had to turn switch rigs
> 
> because
> 
>>>of the PTO drift.  Is there a known problem with PTO drift on this rig?
> 
> If
> 
>>>there is, what's the fix?
>>>
>>>Thanks,
>>>ed - k9ew
>>>
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>>
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> 
>