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Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
As far as I know, spark length always goes as the square root of power input. If you put two coils doing 12 footers next to each other, you won't get a 24ft arc between them, because you only doubled the power input.
I have one of the old Pico PC-based digital scopes. I run it off an old Thinkpad laptop, and I've connected this setup to a few solid-state coils to capture waveforms. I stopped short of letting sparks hit it.
Pico found out about it and featured me in their magazine one month.
Registered Member #2292
Joined: Fri Aug 14 2009, 05:33PM
Location: The Wild West AKA Arizona
Posts: 795
Dalus wrote ...
conner that is only true for a single streamer
Indeed, We can make double the spark with double the power if we use two different DRs running out of phase. If we have two coils doing 12 ft each and suddenly we start running them out of phase the spark will form into one 24ft sparks and input power will remain unaffected.
If it was one DR then yes it would follow the square root of input power in order to make double the spark.
Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
Well, have you actually tried it?
There was a big debate years ago on the TCML and I can't remember the answer, but I'm fairly sure I am right, otherwise all the spark length records would be held by twins and bipolars.
Maybe the coils load each other capacitively and the total output voltage goes down, or maybe the E-field is just a different shape when two coils are in use, but I'm pretty sure you don't get that extra 1.41 worth of free sparks.
Registered Member #2292
Joined: Fri Aug 14 2009, 05:33PM
Location: The Wild West AKA Arizona
Posts: 795
I have tried it but not with the larger coils, I have on my two smaller twin DRSSTC. If I'm remembering right when the grounding is correct I got double the spark for the same amount of power per single coil.
If the square root held true for two coil this means that when running out of phase both of the coils would suddenly become 1.4141 x less efficient when the phase shifted by one half cycle. In my mind I don't see why this would happen...
I have also noticed out of phase connection when playing MIDI, because I have not synced the MIDI between the two coils I get the occupational connection between sparks and when this happens they also doesn't suddenly get 1.4141x less efficient.
You know what song you should play on it? Its a song that can only be MIDI-ed. There is no way to play it on the piano without cheating. It's called Circus Galop. If you search the song on youtube, I know one of the versions contain a MIDI link. That would be awesome to hear it on the coils! :D
Registered Member #2292
Joined: Fri Aug 14 2009, 05:33PM
Location: The Wild West AKA Arizona
Posts: 795
HighVoltageChick wrote ...
You know what song you should play on it? Its a song that can only be MIDI-ed. There is no way to play it on the piano without cheating. It's called Circus Galop. If you search the song on youtube, I know one of the versions contain a MIDI link. That would be awesome to hear it on the coils! :D
Ummm... do you realize how many poly notes I would have to do? The DRSSTC would be running near CW! Just playing two notes at a time on one of those big coils is enough to shoot the current draw from the 240VAC main to well over 50A That's 12Kw+ for those keeping track...
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Laptop + DRSSTC = not as bad as you think!
