There is a "ball drive" vernier in there. Three ball bearings run
in a groove on the shaft; works like a planetary gear drive. Cleaning
and re lube might help, but sometimes the brass shaft gets worn and then
it won't work. Usually it gets worse with use. I had a machinist make a
shaft out of hardened tool steel (we used a cut off screwdriver shank
for steel stock) which never wore out and never slipped again. I don't
think rebuild kits are available anymore. It's the shaft that the knob
attaches to. If you do what I did, be sure to use good quality steel.
On 9/26/22 12:00 PM, tentec-request@contesting.com wrote:
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Today's Topics:
1. PTO Adjustment? (Shawn Upton)
----------------------------------------------------------------------
Message: 1
Date: Sun, 25 Sep 2022 16:55:38 +0000 (UTC)
From: Shawn Upton<kb1ckt@yahoo.com>
To: Discussion of Ten-Tec Equipment<tentec@contesting.com>
Subject: [TenTec] PTO Adjustment?
Message-ID:<1849131253.308156.1664124938367@mail.yahoo.com>
Content-Type: text/plain; charset=UTF-8
Before I pull the rig apart... is there an adjustment for "tightness"?? Not
drag.
I've noticed that my Corsair, I can turn the knob slightly, what ought to be
say 50Hz of frequency change--but the dial skit does not move.? Like there is
slop in the mechanism.? So I'm wondering if something could be snugged up just
slightly.
Been years since I tore one apart, and I did not rebuild this one, so I have no
idea what is in there.? All I know is, sporadically it feels like dial lash or
similar while trying to tune in a signal. That little bit of play means I have
to overshoot, then turn back, if not right, repeat.
Shawn kb1ckt
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