[volt-nuts] Mechanical choppers

Dick Moore richiem at hughes.net
Mon Mar 22 19:49:07 UTC 2010

On Mar 22, 2010, at 5:00 AM, volt-nuts-request at febo.com wrote:

> Message: 2
> Date: Mon, 22 Mar 2010 10:07:13 -0000
> From: "Roy Phillips" <phill.r1 at btinternet.com>
> Subject: Re: [volt-nuts] Mechanical choppers
> Dick
> I have a faulty HP 419 Null Meter with this problem.  Have you encountered 
> these ?
> regards
> Roy Phillips.

Roy, I've tried to buy one, but have never actually seen or used one, and am not familiar with the circuit it uses. I would say that most choppers of any kind can be upgraded somehow. If you have a circuit diagram, I can comment on how I might proceed....

Dick Moore

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