[Premium-Rx] WJ8617B/8618B Question

[refmon]

Hi Spencer,

The following idea is not from an 8618, rather it is from a mid 80's piece 
of broadcast gear.  When the operator would "stylishly" spin the control 
knob, the adjustment would either stop or go in the wrong direction.  I 
finally traced the problem to a component (I don't remember what) in the 
phase detector circuit that figures out which way the knob is being turned. 
Could your problem be related to similar circuitry in the 8618?

Of course, the encoder could need a cleaning, or the light emitter might be 
dirty...you could lose sensitivity to the point where the dwell-time on a 
clear spot just isn't enough to trigger the pulses-when going slow, you'd be 
ok...faster, it might screw up.  Be careful to choose your cleaning agent 
carefully--some of these things can be dissolved rather easily with the 
right (read wrong) solution.

I hope the problem is determined to be cheap and easy in the end.

good luck with this

John Collins
_______________________________________________________
----- Original Message ----- 
From: "spencer bahner" <spencer12345 at msn.com>
To: <premium-rx at ml.skirrow.org>
Sent: Wednesday, October 04, 2006 8:55 PM
Subject: [Premium-Rx] WJ8617B/8618B Question


> Premium RXers who are also WJ8617B/8618B drivers:
>
> Have any of you encountered a problem where as you tune quickly with the
> rotary tuning knob, the receiver tuning will 'skip' (or stop tuning)? This
> happens only at high rate, not while tuning slowly or at moderate speed. 
> Is
> this skipping a function of the optical encoder? Can this be resolved
> through cleaning or repair of the encoder or is it a sign of something 
> more
> serious? All other functions and operations of the particular receiver are
> fine. Thought I'd ask the virtual group before I started tearing things
> apart.
>
> Thanks in advance for any help!
>
> Spencer Bahner N7UMO
> Seattle, WA USA
>
>
>
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