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Registered Member #4359
Joined: Thu Jan 19 2012, 07:31PM
Location:
Posts: 2
Hello everyone, I'm just wondering if Steve Ward is with eastern voltage research? Because it look like what eastern voltage research has to offer, are identical to Steve's work.
Registered Member #3964
Joined: Thu Jun 23 2011, 03:23AM
Location: Valenzuela City
Posts: 332
EVR are selling the parts and the schematics, S.ward do not - (only the schematics are for free "of course").. EVR is a research group, S.ward is not. Both Entities are great with a common subject, TESLA COILING.
Registered Member #4359
Joined: Thu Jan 19 2012, 07:31PM
Location:
Posts: 2
Thanks everyone for the info.
The reason I asked is because EVR claimed that they research and design their Tesla Coil, but what on their website just give me a feeling that they are just too similar to Steve Ward designs.
Registered Member #2919
Joined: Fri Jun 11 2010, 06:30PM
Location: Cambridge, MA
Posts: 652
EVR is largely run by Dan McCauley, one of the pioneers of DRSSTC's. From what I understand, Dan commercialized Steve's universal driver, which is one of the reasons why Steve's work is so very popular in the coiling community (that, and the fact that the UD is a wonderful coil driver).
Registered Member #2292
Joined: Fri Aug 14 2009, 05:33PM
Location: The Wild West AKA Arizona
Posts: 795
Killa-X wrote ...
i happen to own EVR Beta test universal drsstc driver.
i just drew in my modifications to his schematic. these are scans of what dan gave me. thanks :)
FYI Your not really adding any lead with the circuit you added there. The device that squares the chopped sine has to be fast and have a some what narrow window of hysteresis on it usually less than 5mV to 10mV. The 7414's hysteric window at 1V to 1.5V is way to large for phase lead, any lead added with the inductor is basically lost in the large hysteretic window and slow skew rate of the 7414.
Registered Member #599
Joined: Thu Mar 22 2007, 07:40PM
Location: Northern Finland, Rovaniemi
Posts: 624
Goodchild wrote ...
FYI Your not really adding any lead with the circuit you added there. The device that squares the chopped sine has to be fast and have a some what narrow window of hysteresis on it usually less than 5mV to 10mV. The 7414's hysteric window at 1V to 1.5V is way to large for phase lead, any lead added with the inductor is basically lost in the large hysteretic window and slow skew rate of the 7414.
Funny how people keep saying it doesnt work and yet still it works just fine. Been there done that and im very happy with results.
Before:
After:
All i have is slighly beefier feedback ct (around 1:500) and adjustable inductor with some resistance as load. Feedback signal is taken normally and fed into 7414
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Steve Ward & Eastern Voltage Research
