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Registered Member #1732
Joined: Thu Oct 02 2008, 02:34PM
Location: Huntsville, AL
Posts: 112
Uspring wrote ...
Are you using some kind of primary current modulation such as a phase shifted bridge?
Yes; freewheeling.
KrowBar wrote ...
I have to keep up on things so I don't miss seeing these great coils in action live. What's this Teslathon you had? Was it in Huntsville? I moved to Madison not too long ago and am trying to get enough house projects finished to have time to get back into coiling. With a couple of avid coilers nearby it's a shame that I haven't been more involved in the hobby lately.
It's just a small "Teslathon" that I have every year at my home (in HSV). We run a bunch of solid state coils, drink beer, and eat good food from the BBQ.
Registered Member #30656
Joined: Tue Jul 30 2013, 02:40AM
Location: UK
Posts: 208
How does the noise compare with long pulse-length to short pulse-length?
Am building a QCW as my second coil as I'm now space and noise limited, but I'd like to know if I'd also be able to run it in a more conventional square pulse type mode without getting the cops called on me!
Registered Member #1732
Joined: Thu Oct 02 2008, 02:34PM
Location: Huntsville, AL
Posts: 112
Hydron wrote ...
How does the noise compare with long pulse-length to short pulse-length?
Am building a QCW as my second coil as I'm now space and noise limited, but I'd like to know if I'd also be able to run it in a more conventional square pulse type mode without getting the cops called on me!
It's not quiet like a QCW, but it's not quite as loud and shrill as a low duty DRSSTC. I need hearing protection when I run it inside.
Registered Member #2694
Joined: Mon Feb 22 2010, 11:52PM
Location: Russia, Volgograd (Stalingrad).
Posts: 97
Phillip Slawinski wrote ...
Intra wrote ...
How much cycles of startup oscillator this coil have?
Two. The coil runs at F0, so probably it would be okay with just one startup cycle.
Why then startup oscillator is needed if coil runs at lower pole?
I thought startup oscillator was created for holding coil startup at higher pole when primary tuned on lower until streamer capacitance will not drop resonant frequency.
Registered Member #1732
Joined: Thu Oct 02 2008, 02:34PM
Location: Huntsville, AL
Posts: 112
Intra wrote ...
Why then startup oscillator is needed if coil runs at lower pole?
I thought startup oscillator was created for holding coil startup at higher pole when primary tuned on lower until streamer capacitance will not drop resonant frequency.
The startup oscillator can be used to force a coil to oscillate at the upper pole, but it's also used to just get the coil oscillating in the first place. It also ensures that the switching isn't 'wrong' on the first half cycle like you get with inductor phase lead drivers.
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DRSSTC V ( now "Skinny Coil" )
