I’ve always used a safety pin. The springy part rests agains the PTO shaft, Use
one of the screws that hold the PTO to the chassis to secure the pin
Mike, WB8VGE
SunLight Energy Systems
The Heathkit Shop
http://www.theheathkitshop.com/
J e e p
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> On Sep 15, 2022, at 10:57 AM, Josh Gibbs <gibbsjj@gmail.com> wrote:
>
> From the Ten-Tec Reflector October 25, 2005. Posted by Ed K9EW:
>
> For anyone using a Ten Tec rig that has PTO tuning, here's good news… I was
> rebuilding the PTO in my Argosy 525, and decided to try grounding the
> tuning shaft to eliminate the sometimes irritating frequency change that
> occurs as you bring your fingers near the tuning knob on the older TenTec
> rigs. This might be more a CW issue, but perhaps it shows up in digital
> operation also.
>
> I wanted some kind of a springy wiper contact, and I wound up using a piece
> of #22 copperweld wire. I wrapped one turn around a small drill bit to form
> a loop, and mounted it under the LEFT PTO screw on the inner front panel. I
> had to make a couple of bends to get the wire to lay on the larger diameter
> portion of the tuning shaft, making a half-loop at the "wiper" end to ride
> on the shaft. This grounding wire must clear the dial cord, but it must
> also avoid interfering with the outer front panel. It's easier than it
> sounds. And the best part is that it works! There is absolutely NO CHANGE
> in receive frequency no matter where my fingers are.
>
> The next time you're doing a PTO rebuild, I highly recommend making this
> simple mod.
>
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