[MRCA] R-390A query

[WA5CAB at cs.com]

Jeep,

The last time that I actually did this may have been 48 years ago and 
15,000 miles away but most if not all of the R-390A/URR manuals have a drawing in 
the NAVSHIPS manual and I think in the -35 showing how to initially set the 
mechanical position of the various cams and slug racks.  If memory serves 
(and this does NOT work with an R-390/URR), this is set with the band switch 
(MC knob) and tuning display at a frequency of 7,999+ KC. There is a line 
engraved on (I think the rear of) each visible cam.  Beyond that, I don't 
exactly recall the details.  

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480

In a message dated 04/28/2016 05:43:15 AM Central Daylight Time, 
jeepp at comcast.net writes: 
> Dale,
> 
> Your diagnosis was correct. One particular slug rack was NOT moving, 
> indeed the one affecting the 4 thru 7 MHz bands.  The coupling is loose (hence 
> no coil rack movement) but the cam is moving around correctly.  In reading 
> the TM, it says to set the cam follower so that it is not quire bottomed out 
> on the cam at the lower frequency of the given band.  I'm trying to divine 
> which side of the cam "bottom" is the correct one and exactly where "up" 
> on the can is the point "not quite bottomed out"?  I'm going to read the 
> books again and see if I can glean the process better.  I can certainly gain 
> access to everything necessary to affect the setup.  Its just knowing the 
> exact point as to where on the cam I need to be.  Looks like this issue is 
> indeed fixable!  The S-meter issue is progressing.
> 
> Jeep - K3HVG
> 
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