RE: Obits - How many are too many???

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

Original poster: "Loudner, Godfrey by way of Terry Fritz <twftesla-at-qwest-dot-net>" <gloudner-at-SINTE.EDU>

Hi Paul

I don't believe that obits have enough insulation to withstand the placing
of two in series for 12,000 volts. Since you have a chance to get many
obits, you should try two in series so that we will know once and for all if
the outfit will perform for long periods of time. There just might be a
chance of good performance if you isolated the obits with an extreme
isolation transformer. Perhaps you can use two obits for an isolation
transformer by running them back to back, i.e., 120 in first obit, 6000 in
second obit, then 120 out second obit. You can bank these isolation outfits
together for a big isolation farm. Then this would be the power supply for
your big obit farm. Tell him you have a research idea and will take all the
obits. One kVA is one kVA, no matter what supplies it. But with a pole pig,
you know that the insulation is very unlikely to break down.

Godfrey Loudner 

> -----Original Message-----
> From:	Tesla list [SMTP:tesla-at-pupman-dot-com]
> Sent:	Thursday, January 31, 2002 8:18 AM
> To:	tesla-at-pupman-dot-com
> Subject:	Obits - How many are too many???
> 
> Original poster: "Paul Kidwell by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <tmb-at-ieee-dot-org>
> 
> Hi Everybody!
> 
> Does anybody have any idea what the largest obit farm anybodies come up
> with?
> 
> I was talking with a guy today that supposedly has boxes filled with 6000V
> 20mA
> Obits. He  said he had no use for them so I told him I'd take them. He
> asked how
> many I wanted and off the top of my head I just said a dozen. He said "ok"
> and
> he'd bring them by in the next couple of days.
> 
> He left one with me. It has a single hi-voltage electrode. I was thinking
> of
> tying pairs back to back for 12000V, then paralleling pairs for whatever
> current
> I wanted. 12 wired this way would be 12000V at 120mA.
> 
> Do you eventually reach a point of diminishing returns???
> 
> Let's see.... 50 pairs would be.... 1000 mA output...
> 
> Exactly how many could I parallel before it would be better to just haul
> out my
> 15KVA pig and current limit it down?
> 
> Here's another question, which would perform better, a 15KVA pig current
> limited
> down with inductive ballasts to 1KVA, or 1KVA worth of Obits???
> 
> I'm really wondering how many this guy has :)
> 
> Paul
> G-5 #11
> 
>