Not logged in and have a few testing jobs questions to specialists. : wink: I would like to build a Marx generator. First time only in the small style, to see how that so Cresap. Maybe later then even slightly larger. Now my questions:
-The resistors: how high must the dielectric strength of the resistors be roughly dimensioned? And what performance should they about can depend?
-Works of Marx with a pulsating DC voltage (100 Hz)? I intend to take a small OBIT or NST with bridge rectifier. I do not want to use transformer. Alternatively I would have still a HV Gerätchen from a copy machine, but this brings only about 0 5mA, therefore, I am afraid, would that probably not funzen.
Has any of you had any "Marx experience"?
Depending on the performance, taking power resistors with ohm values from 1-10 mohm. Best, taking of course high-voltage resistors. But unfortunately one finds everywhere. Normal resistors also work in my experience. Wirewound resistors also...
I never tried with power transformers, Flyback transformers and Cascades. With OBITs and NSTs should go too. The current limited one anyway at the entrance of the Marx generator: wink:
With pulsating DC that works on every case
1 Jop GAB has already said, is no problem. I've built even one, and must say that well has net so gefunzt. But the resistors lags definitely not. And the value produced, everything can take. If you want to fully exploit the power of the OBIT. Only then it could happen that the resistors off smoking friends. Because of the complete energy Yes, briefly. Would take so perhaps maybe 10 mohm, then you can be sure that the hold that, because of the power and thus the power then also strong enough are limited.
2. and with pulsating DC voltage, clear. If there are but only a half-wave, then come just only half as often as strobes, such as with full voltage. But if every second or every half second a Flash hence shrugs, doesn't actually matter.
P.S. heart ICH welcome! Questions due: that we are Yes. Succeed on a good! Thank you very much for your answers! * freu * :) Then I will try probably for the first time with "normal", still lying around carbon film resistors, I still 50pcs 15 MΩ offers cheap (maybe I hang as a precaution each 2 or 3 units in series).
Going to tell then what's worked, when I'm ready...
So, now I've finally finished HV electrical my 7-stage Marx generator and he does even also more or less: wink:. Since my high voltage source is not so convincing, he creates about 50kV. An Oelbrennertrafo with rectification unfortunately didn't work, because I've taken just a HV power supply from a copier (7.5kV).
You can find information about the Marx and (unfortunately a few) pictures on my page: thank you very much for your positive feedback. Tune I unfortunately longer may not necessarily, Marx as the only problem ^ is the HV power supply. The capacitors are actually designed for 14kVDC, which would bring its output by around 100 kV (10 cm). As but my HV-DC-source no longer than about 7.5kV, also only half the spark length is concluded. Times even tried using a transformer, but the activation did not work properly. I have probably done what wrong, because the transformer has had inside. Whether I would have to ground probably an additional pin? Only 4 Anshclüsse took, namely 2 for the input signal of the power transistor, the HV-output and the corresponding pin (bottom). Any of you know why the ZTR Interior has had?
Many greetings and ever thank you for your help!
The most Flyback transformers are designed for approximately 30 kV, with higher input power or can take other operating frequency, depending on the transformer.
Some hobbyists get through up to 100 kV from a transformer out, without immediately take, other ZTs burn with less power.
You can only test and use the survivors. : wink: maybe may at the output of the Flyback transformers have a resistor in series
to Marx, the Marx can make also no short circuit, if the capacitors are empty and load again.
Thank you for your tips. Unfortunately, I had already trouble just controlling the transformer (without Marx). The ZT worked quite quickly inside and the fun was done. Maybe the ZT was struck but even I don't know. Must follow the thing even still and organize an other ZT. Unfortunately I didn't see... some little time for such fun at the moment ;-)
Anyway, thank you very much for your tips! Greeting kilovolt
