Steve-
It sounds like power is continuously applied to the solenoid else why
would it buzz when it shouldn't. A quick check would be to see if it
unlatches when power is disconnected.
Just a thought.
Fred, W6TKV
Steve Gilbert wrote:
>
> After refurbishing my Ham IV rotator with a new potentiomer and new ball
> bearings, (the old ones had gone black as damp had gone into the casing), the
> one problem that remains is the fact that the brake solenoid and armature seem
> to have become magnetized, so that when the brake is released and there is no
> current, the armature does not release. I tightened up the return springs, but
> this made no difference. The only way around this seems to be to place a thin
> non-magnetic layer, like a layer of PVC tape across the pole piece of the
> solenoid, so that the magnetic circuit is broken. The armature then goes back
> every time, BUT the solenoid tends to buzz !!! Any great ideas???..Steve,
> G3OAG
>
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
> Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
> questions and ask for Sherman, W2FLA.
>
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_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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