Hfsstc- more input power

[@Rick-hq5yg]

Nice video 👌

[@dirkk82]

Thanks much 😎

[@Magneticitist]

Sweet that's pretty good output at only 40v. I bet it could take at least 60v like the schematic says but def have to get the efficiency right to avoid burning everything out. I don't have that problem on some coils and others I do, it's pretty weird. The best setup I like right now is using like a little pill bottle sized deal and the plasma bush is tiny but the arc I can pull is big and hot. With that config it pulls the 100mA or so until loaded and then still only maxes at like 2.5A tops. Heat isn't an issue. I've been playing with various micro sized coils for a while now though and have only had luck getting a bush the size I had before in the first micro test. Doesn't pull the crazy hot arc though.. In that setup I was pulling 1A just with breakout and up to maybe 3A pulling the arcs. It seemed like the perfect setup I haven't been able to recreate yet where everything seems to either run real cool but with puny output or run real hot with decent output. My capacitors get especially warm also BTW. A lot of the newer coils I've tried also seem to work the best by tuning the pot up or down after the initial oscillation. So one for example will start up at a certain pot setting but then will max out the output once I turn the pot back down all the way. Another arrangement liked the pot all the way up so it does seem like with the given capacitor values the pot is more or less helping the feedback tuning to resonance. With the smaller coils the necessary primary location for any breakout at all is so small it's really hard to hit also. I mean like a fraction of a mm variation up or down and the output increases or drops dramatically. At this point I'm not entirely sure what had my first micro coil going so well although I have noticed this circuit damaging a couple fets maybe due to heat where they appear to be in working condition until you remove them and compare their megaohm resistance across the drain and source with a brand new fet. I pulled one that dropped to 8meg from a brand new 11meg and while it still worked it wasn't outputting quite the same. Certain setups just seem to be too power hungry and cause too much fet dissipation as well as primary coil heating to be worth it while others seem to hit right on the sweet spots where the output is good but everything also stays fairly cool so long as a continuous arc isn't being drawn.

[@dirkk82]

I can go 60v but not on this setup, I put a coil with higher reso. frequency on there and the current draw was maybe a couple of amps, the discharge wasn't as good but still good RF power and can still draw a good arc from it, so having the right coil is key to efficient circuit, the big cap should get changed to film cap because of higher freq. It could explode 🤪 I could add an interrupter on it as I run the secondary to RF ground, it works fine like that