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- To: <tesla-at-pupman-dot-com>
- Subject: 10KV RMS -at- 300MA for less than $100
- From: "Thomas McGahee" <tom_mcgahee-at-sigmais-dot-com>
- Date: Mon, 10 Mar 1997 12:41:18 -0500
Fellow Coilers, Yes, 10KV RMS -at- 300ma for less than $100 delivered in the USA. I have run across a transformer that is just about perfect for Tesla Coil work, and I want to let you all in on it. Herbach and Rademan have 100 of these transformers in stock. They are rated at 5,000 volts RMS, 300 ma continuous duty. These are *open-frame* transformers, absolutely NO tar or anything else to give you problems. Mine came with power factor correction capacitors included. There are current shunts installed... which is actually a *plus*, because it means you do not need any reactance added to the primary! If you insist on removing the shunts, it is very easy to do so, since it is all open frame construction! The secondary is entirely isolated from the core! I bought two of these and wired the primaries in anti-parallel. This makes the phase of the two secondaries *opposite*. That allows me to take the inner wires of each secondary and wire them together so that the two *outer* wires of the secondaries are oppositely phased. In other words, the total series output is now 10,000 volts AC RMS (14KV Peak!) at 300 ma. If desired, the inner wires of the secondaries can be connected to AC ground, so that the electrical stresses are reduced. But if you want to, you can also leave them floating. Both ways work. By two for $39.50 each, throw in about $15 for shipping, and you are under $100 for an almost perfect 10KV RMS 300ma *open frame* NO TAR transformer for your Tesla coil. The really daring among you can figure out other combinations of these transformers, I am sure. Part Number TM92XFR2019 5KV 300ma Transformer $39.50 each Herbach and Rademan 18 Canal St. P.O. Box 122 Bristol, PA 19007-0122 Orders 1-800-848-8001 Fax 215-788-9577 Business hours Mon-Fri 8 am - 5pm EST Ask to be placed on their mailing list! Hope that this is something useful for all of you. This is not exactly a pole pig, but two of these will deliver 3,000 VA at continuous duty. Not bad! Fr. Tom McGahee
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