[R-390] Dumb Mechanical Alignment question

[Barry]

Since the PTO tunes from 3455kc down to 2455kc, you should be able to hear it on a general coverage receiver with a BFO.  Be aware that the PTO shouldn't be made to travel very much past those two frequencies.

Good luck with it.  It sounds like you're almost there!

Barry - N4BUQ

> I was home today with Strep throat so decided to just set it to 7+000 and remove
> all gears , using fishing line/hemostats and tape to keep every cam in
> position, and the re-assembled. All seems good. I dread put RF deco back into
> the radio only to have to take it out again, but it has to go in at some point.
> Have replaced bumblebee caps.
> 
> Once it is in how do I confirm all is working properly with my PTO? Listen to
> the PTO with a portable shortwave receiver?
> 
> Tightening those clamps is scary since I got this with two broken ones.
> Sent from my iPhone
> 
>> On Jul 15, 2026, at 8:44 AM, Paul Roche <rochep at comcast.net> wrote:
>> 
>> OR now that everything is set to 7+000 do I just carefully remove gears, try to
>> to move KHZ or MHZ shaft, and re-assemble with gears in correct positions? That
>> might be easiest. Bandswitch and Geneva gears are at 7+000 right now.
>> Sent from my iPhone
>> 
>>> On Jul 14, 2026, at 8:42 PM, PAUL ROCHE via R-390 <r-390 at mailman.qth.net> wrote:
>>> 
>>> Now have my detent spring (thanks to Don) and time to get all set for 7.000+. I
>>> can pull up all the cams with a tool EXCEPT the second cam from the left, it
>>> does not have a clamp. How do I set it up so it is at the line when I am at
>>> 7.000+? Do I just leave everthing as it is now (at 7.000), remove gears till I
>>> can get at it, and then rotate IT to the line and carefully re-assemble gears
>>> and cams? I am afraid if I do this and go back to full CCW it will NOT stay
>>> where I want it when I am finally up to 7.000+.
>>> 
>>> Am I missing something obvious? I could set all cams to the marks and the
>>> counter to 7.000+ and bandswitch correct but then my 10 turn stop on MHZ knob
>>> would be off.
>>> 
>>> Paul
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