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Re: Homebrew Variacs? (fwd)
---------- Forwarded message ----------
Date: Fri, 17 Jul 1998 18:22:35 -0700
From: Bill Henderson <hb-at-earthlink-dot-net>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: Homebrew Variacs? (fwd)
Tesla List wrote:
>
> ---------- Forwarded message ----------
> Date: Thu, 16 Jul 1998 09:41:27 GMT
> From: Mike Harrison <wwl-at-netcomuk.co.uk>
> To: Tesla List <tesla-at-pupman-dot-com>
> Subject: Re: Homebrew Variacs? (fwd)
>
<SNIP>
> Alternatively, find a nice big transformer and wind a new secondary
> with taps to select the output voltage.
> Make the first tap half the voltage of the others - this will double
> the number of voltages you can get from the other taps.
>
> Or wind several secondaries, each twice the voltage of the previous,
> to allow selection of voltage by combining windings in a binary
> fashion. 4 windings (10,20,40,80V) could give you 0-150V in 10V steps.
> You could use a binary rotary switch and 4 relays to select the output
> voltage.
>
> ____ ____
> _/ L_/ Mike Harrison / White Wing Logic / wwl-at-netcomuk.co.uk _/ L_/
> _/ W_/ Hardware & Software design / PCB Design / Consultancy _/ W_/
> /_W_/ Industrial / Computer Peripherals / Hazardous Area /_W_/
Try a used buzz box......thats what the big boys use!
Bill