Joule Thief

[Pirate88179]

NOP:

That correlates with my thinking on this.  Thank you.

Bill

PS  I just noticed we hit 6,000 posts here!!!!!!!!!! (Edit)

[TheNOP]

one more thing.
about the cost aspect of cfl.

it cost less to incorporate heaters then to incorporate a "decent" rf shield.

the tube itself will also emit rf if the power supply is rf based.
that is the reason we do not see those kind of supply in general stores.

[jeanna]

Good going everyone!

I just passed page 120 so you all must be on page 600 too? (50 posts aper page is much easier to read)

I am half way through the biggo fatso. Winding it sure goes fast when you can just put the whole spool through the middle.

I am putting 240 turns on this one... 60up,60down,across,60up,,60down. So far I have 131 volts on this secondary. I will perfect the primary when I finish the secondary, but for now, it is a slower oscillation. I am just using a 1k ohm resistor, and I am sure I will need a much higher value resistor to keep the frequency from dropping through the floor.

131v
17kHz
1k ohm

at
79ohms I got
275V but only
7.2KHz
This is not a good  level because I cannot go much less than 79ohm.
But anyway that is the range so far.

half way

jeanna

[gadgetmall]

Jeanna . Good Nite here is something you might find interesting on the balun used for tuning in series with a resistor choke coil \ May have been posted before . in my archives


gadget

[electricme]

@ Thaelin,

    Just curious, but has anyone tried to wind the first layer of the pickup coil and then just jump over the two small coils and wind the second layer? This would approximate what tesla did with his pancake which made it perform better.

conductor running the length of the tube to help light the gas. This on a 48" tube. May be an easy way to get more light for the input.

thaelin

Is this what you mean about crossing the Primaries, start winding the secondary, when you get to the primaries, "dont wind over them", but rather pass the wire accross the primaries, then continue to wind another set of coils over the 1st secondary layer.

Fluro toobes, I can remember when these things came out and there was a silver strip which went from end to end, then this strip seem to disappear after a few years.

jim