[R-390] Adjusting Linearity Stack Collins PTO

Fri, 27 Dec 2002 06:16:22 -0600

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?
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