[R-390] Cosmos PTO - No Teflon Disk???

[Jon Schlegel]

Thanks Tony,

That pretty much lays it all out.

Jon - WA3MVM


At 04:22 PM 2/14/2008 -0700, you wrote:
>Check out this one. Lots of pictures of the deep innards.
>
>http://www.r-390.com/cosmos.htm
>
>Tony
>----- Original Message ----- From: "Jon Schlegel" <ews265 at rochester.rr.com>
>To: <r-390 at mailman.qth.net>
>Sent: Thursday, February 14, 2008 2:40 PM
>Subject: [R-390] Cosmos PTO - No Teflon Disk???
>
>
>>Hi all,
>>Just opened a Cosmos PTO expecting to find a Teflon disk as 
>>described in "Calibration of the COSMOS PTO"  by Tom Marcotte, 
>>N5OFF at http://www.r390a.com/html/n5off_pto.html.  I found no 
>>Teflon disk inside.  Is the disk really missing or is Tom using the 
>>idea as a visualization technique?
>>I see that the slug driven by the cam follower is itself 
>>screwdriver-adjustable.  Among other things, no doubt, I can see 
>>that this slug's baseline adjustment would affect the sensitivity 
>>of the linearization adjustments.  Is there any accepted procedure 
>>for the baseline adjustment of this slug?
>>Also, the "varnish" on the main coil shows signs of breakdown due 
>>to either due to mild corrosion or perhaps some sort of fungus 
>>among us.  About 1/8 of the surface of the coil is 
>>affected.  Should I attempt to clean/re-coat it or just leave it 
>>alone.  If re-coat, then with what?
>>This Cosmos unit is mechanically kind of on the edge - some worn 
>>surfaces, buggered screw heads, even a bent 370 uuF mounting stud - 
>>but probably salvageable.
>>
>>Regards,
>>Jon Schlegel, WA3MVM
>>
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