Re: BC Tech Problem

[Ted Thompson <tthompsn@mail.bcpl.lib.md.us>]

Tim Wick wrote:
> 
> Could anyone give me suggestions on the following 2 problems?
> 
> This is a BC connected to a 31H. Before the circuit components
> get to operating temperature, there is a microphonic effect
> from the BC console.  For example, tapping your hand lightly by the end
> blocks can be heard in the 31H.  This effect diminishes after
> warm-up. Any Suggestions?
> 
> Originally on this same BC, generator #61 never produced a sound. I
> assumed a broken winding in the pickup coil.  Yesterday, it started
> working.  Unfortunately the pitch was flat.  But I then notice over a
> 30 minute interval the pitch would drop 4 half steps. Then 30 minutes later
> it was within a 1/2 step from where it should be.
> 
> Thanks for any Comments.
> Tim Wick


Note #61 - Something is causing drag on that wheel, prob gunky think oil, 
or improper oil.  Check note # 13 it'll be doing the same thing.

When was it last oiled?


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