Gary, certainly measuring the current running to the ground is important in it's own right, but for calculating transmitter power you would then need to...
Gary, certainly measuring the current running to the ground is important in it's own right, but for calculating transmitter power you would then need to then...
So, for measuring Tesla coil transmitter power both an RF voltmeter and an RF ammeter are required. Lacking an accurate method for measuring the potential on...
Hi Gavin and all, For the secondary/toroid system was in resonance and driven from a CW source and if you knew the secondary inductance (Ls) (easily calculated...
So, for measuring Tesla coil transmitter power both an RF voltmeter and an RF ammeter are required. Lacking an accurate method for measuring the potential on...
... Can you think of a solid-state rectifier that could be used in place of a vacuum-tube rectifier? Also, being a Tesla coil, the primary drive current has a...
Bert wrote, ". . . Using a similar [current transformer], one can easily measure primary current if desired. . . ." I think the best way to proceed will be to...
... Can you think of a solid-state rectifier that could be used in place of a vacuum-tube rectifier? Also, being a Tesla coil, the primary drive current has a...
Gary, you could use an oscilloscope on the primary, one channel across the primary coil, and the other connected to a CT through which one of the cables going...
... Hi Ed, Like many other Tesla Coiling devices, these are expensive if purchased new, but can be found for reasonable prices on the surplus market and eBay....
... If one end of the primary winding is grounded, then you could use a compensated voltage divider (a combination of HV resistors and HV capacitors and a LV...
"Thought you wanted to "roll your own". These are relatively expensive devices and seem like overkill for your applications." -- Ed No. this work is too...
... <snip> Hi Gavin, Yes. However, we can use the above to measure circulating power when the tank circuit has a high Q, is externally driven in CW mode, and...
Ed asked, "What kind of a drive circuit are you thinking of?" I'm presently using a power MOSFET primary drive circuit designed by Gary Johnson (see...
Gary: Just took a quick look at the paper and the circuit in Figure 8 looks unnecessarily awkward to me - I can't understand why he chose that configuration....
Gary: Do you have a schematic of a coil showing how you used the driver in the paper; I'd like to simulate it? I've read it again and from several of his...
Gary: Took a better look at that paper and my conclusion is that, Ph.D. [in what?] or no, Johnson is not a semiconductor circuit designer and just plain...
I'm presently using the same arrangement as shown in figs. 3 and 8 of the Johnson paper. The components/values are: MOSFET = IRF640 D2 = FR304 R1 = 270 ohm V...
Gary: Need more information by far but have to sign off for tonight as tomorrow is a very looooong work day after 6 days off. Questions: 1. What is the...
1. What is the resonating capacitor for the primary? There is no descrete primary capacitor. 2. Is the bottom of the secondary connected directly to ground? ...
Hi Bert, got it, I think, put a CT in the secondary base lead to ground and calculate secondary power from:  P = (Ipk^2 / 2) * sqrt(L /C)  where L and C...
Thanks for that Gary, I've got a load of stuff on MOSFET drivers, I'm planning to get it altogether into a .pdf, just stuff I have picked up from loads of...
Ed, Gary, there's plenty of stuff on the net for designing SSTCs, this particular website is good, and the guy who put it together is a professional power...
More tomorrow if I get a chance. Just one comment now. "The primary current is generally between .750 - 1 amps at 24-26 VDC square wave with a duty cycle of...
Ed asked, "HOW MUCH POWER DO YOU WANT TO RUN?" The maximum primary current is anticipated to be about 5 amps. The maximum power supply voltage is expected to...
Gavin, Ed, This PPT presentation provides information that could help resolve my present SSTC switching issues. "Fundamentals of Power Electronics," Chapter...
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