[R-390] Re: R-390/URR

[Joe Foley]

That would be the ZERO ADJUST clutch, the knob should
be turned all the way counter-clockwise, but be
careful, it may not be working correctly if not it may
come apart.  Take a look at your working receiver and
see how it is supposed to work.  Then verify that it
does or doesn't.  If not, prepare to remove the front
panel.

You'll want to do some research on how to repair the
clutch.

Joe




--- Bob Young <youngbob53 at msn.com> wrote:

> I looked at it today and the PTO is turning fine and
> there is no play there, 
> the problem is in the big front clutch gear (counter
> drive gear?) right 
> behind the front panel. There is a little space
> between the clutch and the 
> mating surface which is not in my other one. This
> allows the PTO to turn 
> (had it opposite, sorry)  but the whole rest of the
> mechanism doesn't turn, 
> you can feel it in the kilocycle knob, there is a
> little play in it which is 
> why I called it backlash. I have loosened the clamp
> and moved the large gear 
> to see if the gears were worn but this had no
> effect. I would say there is 
> about 1Kc of play there in which the PTO turns but
> the readout doesn't, I 
> judges this by the BFO. 

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