[R-390] Dumb Mechanical Alignment question

[PAUL ROCHE]

Just measured the PTO output on 7.000+ and it is 2.716 MHz at 7.000+ and 3.682 MHz at 7.000. So that is off, I am reading Chapter 6 to figure out what to fix.
 But checking the Crystal Oscillator Sub Chassis bandswitch as described in manual 6.2.5.5 I get a value of -4V at test point E210 in Standby but in MGC or AGC position it is ZERO! I wouldn't even know what to check but this seems bad.
> On 07/16/2026 9:02 PM EDT Paul Roche via R-390 <r-390 at mailman.qth.net> wrote:
> 
>  
> Quick update. That paper is over my head. 
> But I used musical generator and fed in a modulated 1 VOLT SIGNAL into antenna terminal (that’s what it took for me to hear the tone). I could find the tone at 0.9 MHz , 2.9 MHz, 4.9 MHz, 6.9 MHz, etc up to 28 MHz. Heard my tone on EACH frequency and jiggling the MHz knob made signal come in better on most of them. So I think that’s good. But signal barely audible at 1 volt!!! 
> 
> I’m not gonna do anything for a while. 
> Sent from my iPhone
> 
> > On Jul 16, 2026, at 6:16 PM, Jim Whartenby via R-390 <r-390 at mailman.qth.net> wrote:
> > 
> > Larry's paper on oscillator levels is applicable to both the R-390/URR and the R-390A/URR?Regards,Jim
> > Logic is a systematic method of coming to the wrong conclusion with confidence.  Murphy
> > 
> >    On Thursday, July 16, 2026 at 04:03:55 PM CDT, Renee K6FSB via R-390 <r-390 at mailman.qth.net> wrote:   
> > 
> > I thought I saw a paper by Larry a while back on osc levels and I did
> > have a copy. My memory still good...it is attached.
> > Renée
> > 
> > 
> > 
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