[R-390] Dumb Mechanical Alignment question

[Paul Roche]

I will try this tomorrow. Thanks to everyone for their help. 
Sent from my iPhone

> On Jul 18, 2026, at 5:18 PM, Jacques Fortin <jacques.f at videotron.ca> wrote:
> 
> Paul,
> I believe that all your sensitivity problems lies just there: your PTO is ~261KHz OFF from the value it is supposed to be.
> I cannot explain how BC band stations could be at "the right place" on the dial, but the whole radio cannot work properly if the range of the PTO is ~262KHz higher than it is supposed to be.
> As Barry suggested, lock the KHz dial to 000 and turn the Oldham coupler and the PTO shaft clockwise until the measured PTO output is at 3.455 MHz.
> OR (highly preferable), lock the KHz shaft to the +000 position and turn the Oldham + PTO shaft clockwise until the measured output is 2.455 MHz.
> Why is it preferable? With the dial at 000, your PTO output is already ~2.5 turns too far and internally the anti-backlash mechanism of the lead screw is very near to hit the rear holding plate. Believe me, YOU DO NOT WANT THIS TO HAPPEN.
> 
> 73, Jacques, VE2JFE in Montreal
>