I am unfamiliar with these types of mechanics so it may take me awhile to give
all the right info.
The pulleys here use a plastic-covered metal cord (probably steel wire). Each
pulley has a gap on the periphery to permit the wires to route into the pulley
area. There are a pair of raised tabs (similar to clips) on the pulley surface
that form a triangle with the gap. On one pulley the wires are looped, crimped
with a malleable and hooked onto these tabs, exiting the pulley via the
peripheral gap and then wrapped around the periphery. The 'far' pulley accepts
the wire around its periphery, the wire enters the gap and hooks around the
raised tabs in a continuous triangle. In the end, the wire only makes one
'loop' around each pulley (there is no overlap).
The pulleys appear to be held onto the shafts by what you could call a very
short shaft coupler--a cylinder with setscrews but only about 1/4" long.
What it all appears to me as is: (1) there is no means to adjust the cord
tension, and (2) I can't figure out how the pulleys even turn the shafts. The
'shaft coupler' is NOT unitary with the pulley...which I would have expected.
Maybe it's supposed to be, and mine is broken somehow?
Later today I can put some pix of the specifics on the web for viewing. Maybe
the description will help, maybe not.
thanks all,
>
> From: Scott Townley <nx7u@arrl.net>
> Date: 2006/01/22 Sun PM 11:59:56 EST
> To: amps@contesting.com
> Subject: [Amps] corded dial drive help
>
> My project amp (specifically BTI LK-2000) has one of those ganged-corded
> dial drive mechanisms to turn the input and output band switches
> together. Is there any reference mat'l that someone can point me to on how
> to maintain/adjust these types of things? One is slipping and doesn't
> respond to my attempts at figuring out how it works (I can't see at all how
> it works, actually).
> TIA,
>
>
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>
Scott Townley NX7U
Gilbert, AZ DM43di
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