[R-390] Cam alignment

[Jordan Arndt]

Paul....

I think you're referring to the PTO travel visa-vis the 10 turn stops, which 
should allow for +/- 20-25 khz  of over-travel at each end. It is also 
important that the PTO is centered within the Dial Adj. range...

73...Jordan VE6ZT


----- Original Message ----- 
From: "Paul Roche via R-390" <r-390 at mailman.qth.net>
To: "Barry SCOTT" <n4buq at knology.net>
Cc: <r-390 at mailman.qth.net>
Sent: Saturday, August 01, 2026 1:10 PM
Subject: Re: [R-390] Cam alignment


>I am sure I am wording my question incorrectly! I thought I remember 
>reading somewhere that when turning the MHZ dial it should be maybe 1/4 
>turn until it hits the first detent at 0.000 MHz I was just wondering if I 
>don’t set it in the detent at 7.000+ would I still have some range a little 
>above and a little below the ends of the bands. As I said, I’m probably not 
>making it clear,
> Sent from my iPhone
>
>> On Aug 1, 2026, at 1:44 PM, SCOTT Barry via R-390 <r-390 at mailman.qth.net> 
>> wrote:
>>
>> I'm not completely sure I'm following your question, but the detent 
>> position only changes with the MC change knob's rotation so at 7.000+ MC, 
>> the spring should still be in one of the detents regardless of the 
>> rotation of the KC change knob.
>>
>> Again, I might be misunderstanding the question.
>>
>> Barry - N4BUQ
>>> I am trying to align my cams to exactly 7.000+ MHZ and I have a question 
>>> about the planetary gear with that spring. I thought I read I should 
>>> install it with the detents halfway between the spring position. But if 
>>> I do that, now when it hits the detent, it is not 7.00+ anymore.
>>> When I’m putting this together, should I install that planetary gear 
>>> with a detent engaged at the 7.000+? I hope this makes sense.
>>> Sent from my iPhone
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