[R-390] Adjusting Linearity Stack Collins PTO

Fri, 27 Dec 2002 09:04:05 -0500

Thanks...I found this link, and also some references to Electric Radio
articles, doing a Google.com search (an amazing thig).  Note:  The PTO
alignment discussions on the r390a.com page appear to discuss only the
Cosmos manufactured PTO.  The linearity adjustment for Collins mfgd PTOs
is considerabily different.

http://groups.yahoo.com/group/r-390/message/4718

Jerry Kincade wrote:
> 
> Start here http://www.r390a.com/ and branch out from there. More info than
> most brains can absorb is available on this subject, including in the list
> archives.
> 
> 73, Jerry W5KP
> 
> ----- Original Message -----
> From: "Jim M." <[email protected]>
> To: <[email protected]>
> Sent: Thursday, December 26, 2002 9:27 PM
> Subject: [R-390] Adjusting Linearity Stack Collins PTO
> 
> > I am looking for instructions for adjusting the linearity stack in a
> > Collins PTO.  I have the PTO in an external jog now with a frequency
> > counter and a calibrated scale and have the end points pretty close, but
> > there is still 1-2 khz error midpoint.   I suspect the stack needs
> > adjusting.  It seems to be connected to a large screw that is accessible
> > from the rear of the PTO (after opening it.  Any info out there?
> > _______________________________________________
> > R-390 mailing list
> > [email protected]
> > http://mailman.qth.net/mailman/listinfo/r-390
> >
> 
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