Phillip Slawinski wrote:
DC, Pardon me, but that seems a little absurd. I can think of many reasons not to do this. To begin with the transformer would make a good power source for the tube in question. Secondly if one were to do this, the transformer would be many times larger, and heavier than it needs to be. If anyone has enough 7.2kV pigs to do this why wouldn't he just sell one to buy a real filament transformer? -Phillip Slawinski
"real filament transformers" are pretty expensive, new, and, as noted by the original poster, are hard to find used/surplus/cheap. Oddly, it's probably easier to find an inexpensive pole transformer than a inexpensive filament transformer.
That said, using a 7.5kVA core for an application needing 400-500VA or so is somewhat overkill. If one has them, a couple microwave oven transformers might be a better starting point (yes, a typical microwave is 600W, but the transformer gets pretty toasty.. I wouldn't use one at 500VA for continuous duty). And hey, the MOT already has a 5V or so winding on it.
On Thu, Jun 11, 2009 at 15:43, DC Cox<resonance@xxxxxxxxxxxx> wrote:If you can't find one, you can do what I did: remove the outer HV winding on a 7.2 kV pole xmfr, 5 kVA, then wind on some #6 AWG wire to make your own. Experiment with 10 turns of finer wire to get the turns ratio right, then wind on the big wire. Dr. Resonance On Thu, Jun 11, 2009 at 7:45 AM, Cameron B. Prince < cplists@xxxxxxxxxxxxxxxxx> wrote:Hey guys, Does anyone have a 7.5V 52A filament transformer they¹d be willing to part with? We actually need two if available. Please contact me off-list. Thanks, Cameron _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla_______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla_______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla
_______________________________________________ Tesla mailing list Tesla@xxxxxxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla