For anyone using an TenTec 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.
73,
ed - k9ew
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|