Re: VTTC Multi tube: filament xfmr

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "marc metlicka by way of Terry Fritz <twftesla-at-qwest-dot-net>" <mystuffs-at-orwell-dot-net>

 All,
 I know i've said it before but, If you check your local electrical
contractors you can get old high intensity discharge light ballast's,
These things are incredible when wound for filient trannys, the 400 watt
units can push 30 amp when wired right. the 1000 or 1500 watt units can
power some very healthy transmitting tubes, or could be set-up for
ballast inductors for pt's or pigs. The high pressure odium ballast are
a work of art, a pick of one is at the very bottom right of pick, very
promising design here? above pick is of the 100 amp unit beside an
adjustable 200 amp drive inductors.
http://www.fortunecity-dot-com/meltingpot/syria/1210/id22.htm
Bottom left is a 400 watt (smaller) and 1000 watt (big with multi tap
wiring) High intensity discharge ballast's that were gotten for free
after dumpster diving behind a lighting contractors shop. the 100 amp
adjustable current inductor in the bottom centre pick came from a motor
control drive i found in the garbage, shims adjust he inductance (the
red phenol board), it is wound with 1\4" x 1\2" flat mag wire.
I truthfully say that once you see one of these 50# beasts, you will
understand my excitement!
take care,
Marc M.
Take care

Tesla list wrote:
> 
> Original poster: "Andy Cobaugh by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <kb3ewy-at-rcn-dot-com>
> 
> I opted not to ruin one of my MOTs and used a core from an old 15/30 Transco
> NST.  I kept the primary on the core, secondaries were beyond repair :-(.  I
> wound about 20 turns of #12 stranded wire on the core to give 7.5V under
> load to supply the 22.7 amps needed for my 4PR-1000A.  I would recommend no
> less than #10 however, because after about a minute the #12 starts to get
> warm, but I didn't have anything larger than 12 so it will have to work for
> short runs of my VTTC.  You can see a picture of the filament transformer
> before everything was tidied up at:
> 
> http://users.rcn-dot-com/tcobaugh/files/hv/filamentxfmr.jpg
> 
> Cheers,
> 
> Andy C.
> Internet Homepage: http://users.rcn-dot-com/tcobaugh/