[R-390] Cam alignment

[SCOTT Barry]

Now that I think about it (and have looked at mine again), all that's 
necessary is to remove the escutcheon.  That gives you access to the 
clamp on the MC wheel which you can then reset as needed. The same could 
be done for the 1/10 KC wheel if the need should arise.  I think there 
are some steps in the manual that address this.

Barry - N4BUQ

On 8/1/2026 6:41 PM, SCOTT Barry wrote:
> If the front panel is out of the way, the counter is relatively easy 
> to "slip".
>
> Barry - N4BUQ
>
> On 8/1/2026 5:20 PM, Paul Roche wrote:
>> That’s not really what I was talking about but that’s OK. I got 
>> everything back together. All cams set for 7.000+ except now the 
>> “frequency wheel” reads 9, not 7 and I can’t turn the MHZ knob to get 
>> to 0; the detent before the “full stop” is 1 MHz and the wheel reads 
>> 3. I guess my 10 turn stop is off; this will require thinking and 
>> reading. I hope I don’t pull the whole RF deck off again.
>>
>> This is not enjoyable. I think I’ll put this thing back together, put 
>> it on a shelf, and maybe after a few weeks or months come back and 
>> revisit this. It’s really more mechanical than electrical and that’s 
>> not so much fun right now because I’ve got a radio that’s a whole 
>> bunch of gears and I just don’t know how to get everything synced up 
>> right. Oh well, the price was right. Free
>> Sent from my iPhone
>>
>>> On Aug 1, 2026, at 3:25 PM, Jordan Arndt <Outposter30 at shaw.ca> wrote:
>>>
>>> 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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