Parallel choke for Variacs :)

• To: tesla-at-pupman-dot-com
• Subject: Parallel choke for Variacs :)
• From: "BunnyKiller" <bigfoo39-at-telocity-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Fri, 05 May 2000 07:25:50 -0600
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

Hi All....

with the help of a few people from the list and a few great pictures I have
accomplished the task of paralleling my 2 1256D Variacs...

I took an old 7 amp variac core and wound 2 seperate windings of #10 solid
core wire ( 20 turns each ) onto the core ...

the variac system was set up to handle 240 v in  280 V out for a total of 56
amps ...

the variacs ( inputs)  are wired in parallel with the wiper outputs each going
to the seperate windings on the old variac core ( choke)  the outputs of the
windings ( choke) are connected together and supply the varied voltage with
wonderful results...  I ran the pig system as a Jacobs ladder for several
minutes at full capacity (280V at 45 amps) with minimal heating of the
variacs   altho the inductors ( ballast) did complain a bit but remained
relativitly cool ...

thanks again for all the help ...

Scot D

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