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I have been building Tesla Coils for many years. I have typically used NSTs and PDTs as the power supply. Recently I built a dual MOT power supply, which worked well, however, I want to change that to a dc supply. My question is can I full wave rectify a single MOT transformer for powering a small classic spark gap Tesla Coil. There is a simple circuit on the internet, but it is only half wave rectified, which I think is wasteful.
Registered Member #64746
Joined: Sat Sept 08 2018, 09:22PM
Location: Italy
Posts: 28
It depends on how your MOT is built, because you need a good electrical isolation on BOTH HV terminals to full wave rectify. Normally one terminal (beginning of winding) is grounded and may even not be accessible. The normal configuration is as a voltage doubler, and in that case both half sinusoids are used.
Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3141
For a given power level, a static spark gap TC operates better with higher voltages rather than higher currents, so I think that your best bet is a voltage doubler, or even a multi-stage voltage multiplier.
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Full wave rectification of microwave oven transformer
