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Registered Member #295
Joined: Tue Mar 07 2006, 06:59PM
Location:
Posts: 23
It is my understanding that both full and half wave voltage doublers output the same power (unlike, full and half wave rectifiers) the only difference being the arrangment of the components (both use 2X diodes, 2X capacitors) and the output frequency.
if the above assumption is correct then say i wanted to build a SGTC, and i had 2 MOTs as my power supply, and a 30nF tank cap. if i was to use a halfwave doubler my tank capacitor would be ~3X too small, and thus my TC ineffiecient, but if i used a fullwave doubler my tank capacitor would be much closer to optimum, and therefore my TC much more efficient.
are the above assumptions correct? and do the components in a full wave doubler need to be rated @ the input voltage, or 2X the input voltage (assuming i don't derated them at all)
Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
What you're asking about, I guess, is the difference between Greinacher and Villard doublers. It's explained here:
Note all of these circuits output filtered DC, so you should be using a resonant charging inductor, de-Qing diode, and rotary spark gap. There are variants of the circuit that get away without this, by supplying pulsating unfiltered DC that allows the spark gap to quench. They are all basically Villard doublers with the final filter cap replaced by the tank cap. Greg Hunter was the expert on these, but I can't find his site any more.
The HV supply in my Tesla-2 was two Villard doublers, one giving a positive output and the other giving a negative output, ran off the same transformer.
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half vs. full wave voltage doublers.
