Joule Thief

[Pirate88179]

Crowclaw:

The same to you as well.

Bill

[tgraca]

Damn... 1,117 pages of posts... It would take me 6+ months to go through these. As I do... here's
a simplified JT circuit that works well for me. 2 inductors and a 3904. I worked through a number of
standard inductors, but the 1M's work the best for 1 AA down to crystal batteries. Here's the schematic
for the one with 10 mH inductors, which works well for very low powered crystal cells.

Note the measurements of ohms and capacitance on these little standard inductors. I don't see anyone
do this online. Lidmotor was the first besides me that I noticed to note ohms a couple days ago with his
most recent video. I hope this is a new trend moving forward.

These measurements will not only help others replicate your efforts, but it also helps with the math behind
it. There's an old Eric Dollard video where he talks about how Tesla worked inductance and capacitance
into his coils to create the most efficient longitudinal waves. Eric didn't talk about resistance/impedance
though... this is where the ohms reading comes in and has to do with reactance.

If you have an ohm meter and/or an LC meter (the best LC meter I have was less than $20 delivered on
eBay), I hope you will take the extra 30 seconds to note these readings on your coils/bifilars/inductors/chokes
so we can all replicate, contribute new ideas, and document what works and what works best.

Thanks! Your fan, Teo!

PS - if you are a MrAngusWangus fan on YouTube, he talks about reactance in his latest 2+ hour video.
He (like me) also believes that the LC meter is the most valuable tool in your shop!!!

[electricme]

@ tgraca,
I sympithise with you, 1,117 pages is an awful lot to read up on.
Like your circuit, keep up the good work.
Resistance (carbon) is a important part in making it tuned to peak performance

[MarkE]

Damn... 1,117 pages of posts... It would take me 6+ months to go through these. As I do... here's
a simplified JT circuit that works well for me. 2 inductors and a 3904. I worked through a number of
standard inductors, but the 1M's work the best for 1 AA down to crystal batteries. Here's the schematic
for the one with 10 mH inductors, which works well for very low powered crystal cells.

Note the measurements of ohms and capacitance on these little standard inductors. I don't see anyone
do this online. Lidmotor was the first besides me that I noticed to note ohms a couple days ago with his
most recent video. I hope this is a new trend moving forward.

These measurements will not only help others replicate your efforts, but it also helps with the math behind
it. There's an old Eric Dollard video where he talks about how Tesla worked inductance and capacitance
into his coils to create the most efficient longitudinal waves. Eric didn't talk about resistance/impedance
though... this is where the ohms reading comes in and has to do with reactance.

If you have an ohm meter and/or an LC meter (the best LC meter I have was less than $20 delivered on
eBay), I hope you will take the extra 30 seconds to note these readings on your coils/bifilars/inductors/chokes
so we can all replicate, contribute new ideas, and document what works and what works best.

Thanks! Your fan, Teo!

PS - if you are a MrAngusWangus fan on YouTube, he talks about reactance in his latest 2+ hour video.
He (like me) also believes that the LC meter is the most valuable tool in your shop!!!

0.6uF seems very high.  Are you sure it isn't 0.6nF?

[tgraca]

@ tgraca,
I sympithise with you, 1,117 pages is an awful lot to read up on.
Like your circuit, keep up the good work.
Resistance (carbon) is a important part in making it tuned to peak performance

I am not sure what you mean by carbon in terms of resistance, but I love the Peter Linderman lecture on Edwin Gray's generator when
he describes this device (below) and references one element as carbon and the key to Edwin Gray's machine. He called it an
Electro Radiant Transciever... I would love to incorporate something like this into a Joule Thief. I can get 70+ volts from 2 inductors
and a transistor with just 400 mV and 1.3 mA, so I should be able to trigger some sort of radiant energy from something like this...