Resonance Circuits and Resonance Systems

[TinselKoala]

I am just getting started with coils! Actually did my first actual tesla coil today. It seems you gotta do few get get a good one. Top load is tin cans and the secondary has too few turns and not even from a one solid cable. But I got got the setup done so that I can switch secondaries and primaries easily.

Bought some wooden shelves, so I can get these PVC coils horizontal and bolted in one place. This way I can store them away easily.

Did you get it working?

Personally I have found that short, fat resonators work better than long skinny ones. Also it isn't necessary to use heavy wire for the secondary windings. Litz wire may improve the primary performance, but #22 or smaller enamel-coated magnet wire is plenty good for secondary winding.

This coil uses #27 magnet wire for its secondary:
http://www.youtube.com/watch?v=aIZClhoU2Xk

[Belfior]

Naah This is one of the simplest circuits so the fault might be between the chair and the keyboard.

I melted one C547B trying different transistors, so something is happening!

Hooked up 2n3055 with a heatsink and that does not get hot. Pot is set to 22k.

I will continue on it tomorrow.

[TinselKoala]

Naah This is one of the simplest circuits so the fault might be between the chair and the keyboard.

I melted one C547B trying different transistors, so something is happening!

Hooked up 2n3055 with a heatsink and that does not get hot. Pot is set to 22k.

I will continue on it tomorrow.

Do you mean BC547B (Ic<300 mA) or 2SC547B (Ic<1A)? Neither one of these are really suitable because... as you found out... the Slayer circuit can draw a lot more than 1A especially if it isn't oscillating properly.

The 2n3055 should work though and it can handle the current.

For the 2n3055 you probably should be using a Base resistance value quite a bit less than 22k, depending on the supply voltage.

Can you post a schematic of the _exact_ circuit you are using? Did you try my suggestion of reversing the connection of the Primary coil?


Meanwhile... back at the ranch...

http://www.youtube.com/watch?v=EcwLFNfxIe8

[TinselKoala]

@Mags
Your speakers are awesome. I've built a few bass-port and infinite baffle enclosures myself, long ago; supplied a few of my high school mates with awesome speaker cabinets for their stereos. But that was long ago, before you could get anything like the modern high-power portable amps and ultrastrong speaker magnets of today.

Now these big bass boomers in cars really annoy me as they drive by. Not because of the sound itself, but because of the massive distortion (trunk lids rattling, etc.) and the lousy music choices. I wonder if we could design some kind of interference field that I could use to put up a "bubble" around the house so those amps wouldn't work within, say, 100 feet of the property.

[citfta]

@Mags
Your speakers are awesome. I've built a few bass-port and infinite baffle enclosures myself, long ago; supplied a few of my high school mates with awesome speaker cabinets for their stereos. But that was long ago, before you could get anything like the modern high-power portable amps and ultrastrong speaker magnets of today.

Now these big bass boomers in cars really annoy me as they drive by. Not because of the sound itself, but because of the massive distortion (trunk lids rattling, etc.) and the lousy music choices. I wonder if we could design some kind of interference field that I could use to put up a "bubble" around the house so those amps wouldn't work within, say, 100 feet of the property.

If you invent it I will gladly pay any reasonable fee up to a thousand dollars or so for one of your units.  It drives me crazy that clowns can drive down the road with the pretend music so loud I can hear it inside my basement workshop.  I think it would need a range of 1000 feet or so as I can easily hear some of them from well over 500 feet away.

Carroll