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Re: [Amps] Vernier knobs?

To: "John E. Cleeve" <>, "'Roger'" <>
Subject: Re: [Amps] Vernier knobs?
From: "Carl" <>
Date: Sat, 3 Oct 2009 09:36:34 -0400
List-post: <">>
I believe that Jackson Brothers or their new entity still produce those in 
the UK and are sold in the USA.


----- Original Message ----- 
From: "John E. Cleeve" <>
To: "'Roger'" <>
Cc: <>
Sent: Saturday, October 03, 2009 5:10 AM
Subject: Re: [Amps] Vernier knobs?

>I think that Roger is referring to a device known in the UK as an
> "epicyclic" drive, or shaft coupler, which consisted of a quarter inch
> diameter knob shaft, with a flat reduction mechanism, about one inch in
> diameter and a quarter of an in thick, which then had a quarter inch 
> female
> shaft socket on the opposite side of the mechanism to couple with the 
> device
> being rotated. From memory I think that the ratio was about 10:1. The
> graduated scale fitted on the outer of the reduction mechanism.
> These devices were very cheap and often formed the drive for many of the 
> old
> BC radios, with the addition of the cord and cord drum which moved the 
> dial
> pointers. 73, John. G3JVC.
> -----Original Message-----
> From: [] On
> Behalf Of Roger
> Sent: 03 October 2009 01:12
> Cc:
> Subject: [Amps] Vernier knobs?
> I've been looking for some vernier knobs for quite a while. They'd be
> akin to a turns counter, but without the handle or counter. Appearance
> would be a knob with calibrations and a skirt with calibrations that
> moves a given travel for each turn.  That's about the best I can
> describe one and It seems like I saw such an animal on some commercial
> test gear, years ago. No, I don't want the little turns counters that go
> with 10 turn pots.  I just don't like the looks of them.
> IOW I could do this with turns counters, but I want to replace the turns
> counters with a much sleeker looking arrangement. These will be driving
> vacuum caps and a roller inductor.
> Any one ever see any of these critters, or know where I can find
> some.What I remember is something that looked similar to the knobs and
> skirts on my Alpha 76, but the skirts turned much slower than the actual
> knob.  However what I want turns the shaft at the same speed as the knob
> while the skirt keeps track of the revolutions. Or is it just my old
> imagination playing tricks telling me that such exist...or used to.
> 73
> Roger (K8RI)
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