[R-390] Unable to ZERO ADJ

[Barry]

> Is it possible to access and un-stick the clutches on the Zero Adj
> from another angle than the side of the R-390A? I have it mounted in a 
> rack
> and would have to take it out to access the clutches from the side. Is top
> or bottom access possible? I may not even be able to get the top or bottom
> covers off without taking it out. I've never worked on one, so I'm not 
> sure,
> but being in the rack it appears it would be difficult to access.
>
> Please excuse my ignorance on this, but just looking for a shortcut.
>
>
> Stan
> W5EWA
> Houston, TX

Dissassembling the clutch requires dropping the front panel and with it 
rack-mounted, you'd most likely have to remove it from the rack.  I doubt 
you could clean it all that well without disassembling it either.

Good news is the clutch can indeed be disassembled, cleaned, and 
re-assembled without too much difficulty.  The biggest problem is realigning 
the little spring washers and all the clutch disks but if you watch how it 
comes apart (assuming it was put together correctly) you should have little 
problem putting it back together.

73,
Barry - N4BUQ