3.5 inch Tesla Coil Build

[peggyyes]

What you have done is WONDERFUL----However----You should expect a visit/RAID/THREAT from the CIA---or some HUGE Government AUTHORITY.

Sad but true, the powers that be do not want WONDERFUL INVENTIONS like this made known to the public. It decreases their ability to control the populus.

[sparkfishes]

@peggyyes

Thanks for looking

Fortunately, in this respect, I am not in the USAand I HOVE a government licence to carry out such experiments

It was not intended to cover TESLA COILS but, by accident, it does legally cover them

[sparkfishes]

NO ! the RF earth is a REAL ground e.g. a copper rod driven iti the soil ( or suitable alternateive e.g. a girder.)

The NST only connects to the primary side of the circuit - via he other components

The tesla coil is a special form of TRANSFOMER

These circuits can kill - however, if you need help e-mail me privately rather than

blow your house wiring or hurting yourself

[sparkfishes]

YOU MUST NOT CONNECT THE SECONDARY TO THE NST!

RF ground is a real ground .... a 3 ft or more, copper rod driven into the ground (earth/soil) .

The NST is ONLY connected to the primary coil via the Caps, spark gaps ( + filter) etc. If you need help e-mail me privately - These circuits CAN KILL!

[Rolls7Royce]

How do you ground the secondary coil exactly? What is the RF ground? Does it attach to the negitive line of the NST?

[squagglenater]

i was wondering if there would be a way to make a tesla coil but instead of just having free flowing electricity would there be a way to focus that electricity onto a certain point...say down a barrel

[sparkfishes]

@squagglenater

I think you are trying to attempt Ronald Reigans RAY GUN - - I have not done any of the following or know any more than the theoretical information such as: High voltages can be contained and directed by using high magnetic fields e.g. CRT and Magnatrons /cyclotrons.

But sending the sparks down a barrel as such is not feasable

[12dart12]

nice. im looking at making a tesla coil. but im not all that good with electrics. i know the basics. But i have a few qiestions that are yet to be answered. maybe u could answer them. Because this is my first tesla coil i want to make it small but still be powerfull enough for the spark brakeout. also i would like to be able to touch the sparks without killing my self or seriously hurting my self. what would you recommend for the voltage, current, size, wire thickness and amount of turns? thanks

[rex2074]

takes power from the grid and does this light show - thats cool - what makes it remarkable? is there a power up jump or wot?

[sparkfishes]

@rex2074

Yes that is correct.

I take (UK) 240 volts step it up to 6000 volts in a NST - iron core transformer

Then it gets increased to 300 000 volts by the TESLA COIL - the sparks are 300 mm, and the rule of thub approximation is 1000 volts will jump 1 mm

in temperate climate conditions

The coil should give out more than 300 mm but it is not perfect and I don't have enough room to make longer sparks safely in my cluttered, garage

[rex2074]

@rex2074 thank you for the response its a remarkable machine judos

[12swordmaster]

I need to know; is the toriod hallow, is there anything inside the secondary coil, and does the primary coil have to have air gaps in between the wires?

[sparkfishes]

@12swordmaster

The top load, toroid ( or sphere) is HOLLOW

The secondary is wound around a hollow former such as a plastic drainage tube or carboard tube - used to hold carpet or dress/ curtain material

If cardboard it must be very dry and then coated with several layers of varnish inside and out

The primary coil is made of copper, car ( automobile) brake tubing (line)

and there are gaps between each turn of about 10mm -

[berkulese]

Re: length of sparks

I believe the voltage required to create sparks in air varies with humidity etc, I may be out by a few powers of 10 (been a while) but in dry air, you're looking at about 25kV/inch. this drops to 6kV per inch in wetter conditions. Not that you'd want to use one in the rain (this would probably be a very, very, VERY bad idea)

[sparkfishes]

25 mm to the inch = 1mm per KV same thing as 25KV per inch

But thanks for reminding the non Europeans of the conversion factor:)

[sparkfishes]

As I understand things, the accepted Lethal current is 30mA.

NST can put out 15 - 100mA plus

I have a 100mA one .

A lot depends on your resistance and the electrical path through your body - across the chest is bad!

All in all, the statements are more as "disclaimers " than absolute fact

I have survived a couple of zaps including one on my nose ( yes you may laugh)

Thanks for watching anyway