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

[Les Locklear]

Some of the earlier Cosmos PTO's did not have the teflon disk.

Les Locklear
Gulfport, Ms.
DX'ing Since '57
http://www.hammarlund.info/

----- Original Message ----- 
From: "Jon Schlegel" <ews265 at rochester.rr.com>
To: <r-390 at mailman.qth.net>
Sent: Thursday, February 14, 2008 3:40 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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