Bob, you are correct - I should clarify this is more of a jump than a steady
drift. It wavers slowly, both plus and minus around the desired frequency.
A fan blowing ambient air into the holes in the chassis near the PTO seemed
to help stabilize it tonight on a 1.5-hour sched, but that would indicate a
temperature problem, not (necessarily) a mechanical PTO one. I did rebuild
the PTO nine months ago, with a Ten-Tec rebuild kit on hand, but to be
perfectly honest I can't remember if I used the kit or if I just cleaned the
parts! In any case, it's also possible the lithium grease that I used isn't
favored by the PTO. From what I understand, lithium grease hardens up a
little bit after the initial application.
More experimenting in order - thanks for your help.
--Andrew, NV1B
..
On Tue, Sep 6, 2011 at 9:10 PM, Bwana Bob <wb2vuf@verizon.net> wrote:
> Andrew:
>
> That sounds more like frequency jumps, not drift. In that case I would look
> for a cold solder joint or get a PTO rebuild kit from Ten Tec.
>
>
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