Re: [TCML] In need of a HV transformer but not a neon

[David Rieben <drieben@xxxxxxx>]

Chris,
 
Sounds like you need to get your hands on the kind of deal that Tim Flood mentioned in his "GE Transformer" thread ;^) He mentioned that the 1.5 kVA, 14.4 kV PT find was a lot cheaper for him than a new NST! I wouldn't mind finding a deal like that myself, as my most recent eBay browses have only produces PTs of this magnitude in the $1000s ;^( Not that I'm really looking that hard for a PT at this time, but Tim obviously found a sweet deal on his ;^))
I'm not sure I have anything left in my inventory that would fit your needs, as I cleaned out my PT inventory years ago in favor of even bigger transformers. I do still have a couple of smallish (~80-100 lbs), untanked x-ray transformers that came out of one of those security x-ray machines (like airports or courthouse installations), bigger than dental x-ray trannies but smaller than DR's office trannies. However, their voltage would really be too high for Tesla coil driving purposes, and you would have to retank them in oil to use them at even a fraction of their rated voltage to prevent self-destructing HV flashover! Suppose you could run one at a significantly reduced input voltage via variac to get an output more in the 20 to 30 kV range? Would still need to be potted in oil to protect them from flashover, though. I (think) they were meant to be ran together in one machine, with their outputs out of phase to effectively add their voltage outputs,
 but I'm not 100% sure about that? Anywho, they are designed for 120 volt input and an est. 75 kV or so output. Well, if by any chance you'd be interested in one (or both) of these, just holler back at me, as I don't really have any use for these space eaters any more and would let them go cheap. The S&H would be the only caveat. BTW, I'm located in the Memphis, TN area in case your thinking that a road trip to pick up would be feasable.
 
David
From: Chris Jones <chrislj74@xxxxxxxxx>
To: tesla@xxxxxxxxxx 
Sent: Tuesday, April 30, 2013 10:39 PM
Subject: [TCML] In need of a HV transformer but not a neon


I'm tempted to dabble in the tesla coil fun again. I was a few year member
of this mailing list probably about 15 years or so ago. Back in the day I
built 4 different coils. All were static gap using neon's except for the
last and final one which was a 7.2KV epoxy encapsulated potential
transformer. Anyway, I eventually moved on and parted with all of my
transformers, wire, coil forms. So that brings me to now. I know this day
and age everything to have more rules and laws than back then. So I thought
I'd turn to this list as a possiblity of locating some parts. First off is
the transformer. I'm looking for something in the 14.4KV range with atleast
1.5KVA. Will consider lower voltage such as 12.6KV. The smaller the
transformer size the better because I know they are very heavy and
freight/shipping is going to be a challenge. Anyone has any leads let me
know, Thanks.
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