RE: 1256D Paralleling Choke

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Cameron B. Prince" <cplists@xxxxxxxxxx>

Hi Daniel,

This is a good idea, but there's only one problem I see. One of my variacs
is a 1256D with both 120V and 220V taps. The other variac is a 1256B which
only has the 220V input.

I appreciate you post,
Cameron


> Original poster: Daniel Hess <dhess1@xxxxxxxxxx>
>
>
> Since you're using only two variacs, why not just run each as a 120
> volt unit; One leg of the 120 VAC to the input of each winding,
> common neutral, and the two wipers form a 0-240 output?
>
> Daniel Hess
>
>
>
> Original poster: "Cameron B. Prince" <cplists@xxxxxxxxxx>
>
> Hey guys,
>
> I've got 2 1256's I've mechanically ganged together. I now need to build a
> paralleling choke for them. I've read some posts and websites on how this
> is
> done, but they talk about using an old variac as the core. I have a
> ferrite
> torroid that measures 2.25 inches O.D. 1.50 inches I.D. and is .75 inches
> wide. I believe the core is physically large enough to get 16 turns of
> 8AWG
> around it, but I'm concerned if the core is magnetically large enough or
> not. Any thoughts about this would be appreciated. I do have two of these
> cores, so I could stack them and wind through both at once if need be.
>
> Thanks,
> Cameron
>
>