[R-390] Cosmos PTO

[DJED1@aol.com]

That last thread on PTOs got me going on mine.  A couple of years ago I 
replaced the Progressitron with a rebuilt Cosmos, and aligned the Cosmos at 
that time.  Over the years it had been gradually shifting, to where some 
points were a Kc off.  I pulled the radio and went through the alignment 
again and was very happy with the results.  I haven't set up a jig for 
alignment, so I use a small screwdriver to adjust the 42 little screws with 
the PTO in place.  I found this time that I could set each 25 Kc point to 
within 200 cycles, and that they didn't interact significantly.  I set the 
end points, then did the fine adjustment.  The result is that I got the PTO 
to track to 2-300 cycles over the entire range.  I just need to calibrate 
once for each band now.  The ability to "easily" align the PTO is a 
significant advantage for the Cosmos PTO.  It took about 5 hours to do the 
adjustment, with most of the time being spent getting the little screwdriver 
into the appropriate screw slot!
Ed  WB2LHI