[Boatanchors] Re: [R-390] Collins 390 zero adjust knob problems.

[Tom M.]

Any relation to Happy Hairston the basketball player?

If your panel screws are not tight, or the clutch is gummed up at all, you
won't be able to disengage the clutch enough to make the calibration.

Make sure all the panel screw are in place and tight, and check for gummed up
works.  I use a carb and choke cleaner to clean the clutch plates.

Tom
--- Harold Hairston <k4hca at alltel.net> wrote:

> Bob;
> 
> I sure hope that you get an answer to this R-390A dilemma (And I am sure 
> that you will) as I experienced a similiar problem over the weekend with my 
> R-390A that I use every day. My problem is with both "Calibration Knobs" 
> that worked ok last time I tried to calibrate the unit. Seems that I can not 
> lock the unit mechanicallly so that I can put the PTO on the 100 KC point.
> 
> Let me tell you what I do know about this matter. My "Operator's Manual" Has 
> a Hand-Written note (Change C-2 ?) that cautions the user not to force 
> either the Dial Lock or the Zero-Adjust past their stops in either direction 
> nor to turn the Kilocycle Knob if the Dial Lock is in locked position., else 
> damage may occur to the unit.
> 
> If you receive replies direct, please pass them on.
> 
> Harold 
> 
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