[R-390] Cosmos PTO for 390A - newbie - Help requested

[Bob Camp]

Hi

There may be some magical twist / turn / tug / bend combination that  
gets the cover off without unsoldering the leads. The simple answer is  
to unsolder them. You certainly do not want them to break while you  
are working on the rest of the unit.

Electrically all of the PTO's are basically the same. Mechanically  
they can be very different. There were pictures of the insides of a  
Cosmos up on the net a few years back. There also were basic  
instructions on working with the corrector on them.

The PTO was replaced as a unit by the military when it went out. If  
they re-did  correctors it was at some kind of 9th level depot. I  
don't think you will find a lot of PTO alignment stuff in the TM's.  
The Cosmos PTO's exist mostly because of large replacement orders  
placed after the radios were in service.

The PTO should turn under finger pressure. How easy / hard depends on  
a lot of things. In an older unit, you probably have a lot of caked up  
grease inside everything. Once you get that out it should smooth out  
some.

Bob
KB8TQ


On Nov 22, 2007, at 12:47 AM, Chris Kepus wrote:

> All,
>
> This is a bit long but I would really appreciate your taking a  
> look.  I have
> to operate on a PTO, I believe, and this is the first one I've put a  
> hand
> on.....yep....I haven't taken one apart...yet.
>