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@qsl.net>
> To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
> Cc: "QRP-L" <qrp-l@mailman.qth.net>; "TenTec List" <Tentec@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
>>>
>>>_______________________________________________
>>>TenTec mailing list
>>>TenTec@contesting.com
>>>http://lists.contesting.com/mailman/listinfo/tentec
>>>
>>
>>_______________________________________________
>>TenTec mailing list
>>TenTec@contesting.com
>>http://lists.contesting.com/mailman/listinfo/tentec
>
>
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