[Amps] Shaft Misalignment Solutions

[Eddy Swynar]

Hi Bob,

I had a similar situation here some years ago with a HB VFO that I was
working on: I had to control TWO variable capacitors with only ONE shaft /
knob!

I ended-up going to the local automotive wrecking yard & going through some
junked speedometer assemblies in dashes that were exposed...I found some
VERY FB nylon gears in an old Chevy odometer, pulled them out, & the rest
(as they say!) is history, Hi Hi.

~73~ Eddy VE3CUI - VE3XZ


**********************************************
----- Original Message -----
From: "W5CUL" <w5cul at sbcglobal.net>
To: "'Bob Maser'" <bmaser at tampabay.rr.com>; "'AMPS'" <amps at contesting.com>
Sent: Thursday, January 22, 2009 9:07 PM
Subject: Re: [Amps] Shaft Misalignment Solutions


> Bob,
>
> Try McMaster Carr, they have quite a selection of gears, pulleys...etc in
> all sizes and materials.
>
> www.mcmaster.com/
>
> 73,
>
> Mike
> W5CUL
>
> -----Original Message-----
> From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
> Behalf Of Bob Maser
> Sent: Thursday, January 22, 2009 6:56 PM
> To: AMPS
> Subject: [Amps] Shaft Misalignment Solutions
>
> I am trying to make the front panel of my 4CX1500B amp look symmetrical
and
> pleasing to the eye.  Because I am using a 3" high RF deck, and have
> restricted vertical space in the outer cabinet,  the vacuum variable and
> roller inductor shafts are going to be misaligned relative to the EF
Johnson
>
> turns counters.  The shafts of both the vacuum variable and roller
inductor
> exit the RF deck front wall about 2" higher than the turns counter shafts.
> There is 3.6" space between the front wall of the RF deck and the rack
> panel. I am considering nylon gears, sprockets and belts, flexible shafts,
> and those crazy shaft drives that are in the Nebraska SS catalog.  I want
a
> system that will not slip but not increase the rotational torque of the
> turns counters. I am leaning towards the sprockets and belt approach(or
> better yet, the chain or bead belts) with bushings in the wall of the RF
> deck to support the far end of the turns counter shafts.  Can someone
steer
> me in the right direction?.  There must be some good websites to buy this
> stuff.  I couldn't find anything on eBay.
>
> Thanks,
> Bob Maser W6TR
>
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