Joule Thief

[Mk1]

@ Jeanna

My multimeter goes up to 2000v , but the bridge is the issue here , i used the 1n4007 diodes to make a bridge , they are good up to 1000v , other diodes usually will drop the output voltage within there respective spec .

Also i see that you made the X2 , with that toroid you use i think you could go 2 turns instead of 3.

Mark

[jeanna]

@Bill,
Hi
The problem with the dmm is it doesn't do a good job of reading the volts on this phenomenon.
I think the spikes are too slim and fast. Wow, crazy 45KHz tonight.

Bill, Have you been able to play with your new scope?

@MK1,
Yes, the bridge and the diodes.
My diodes are 4001.
I will see if I can find their limit.
Or do you know it?

OK, It will be only frustrating but I will not ruin things.
If the diodes drop the voltage.
How do you know that?
What meter or method did you use to learn that you had more volts and the diodes were dropping it?

----
I will try using fewer turns.
What is the voltage you have gotten from the split jt wires with just a single direction secondary?

thanks,

jeanna

[Pirate88179]

@ Jeanna:

Yes, I have tuned it to establish the baseline, and adjusted the trace rotation and even adjusted and tuned the capacitance of my probes. (All per the manual)  That is about as far as I have got thus far.  Lots of switches and dials there.  Trust me, it will take me a while.  But you are doing well and that is great.  You give me hope.  Keep it up.

Bill

[Mk1]

@Jeanna

I have tried many different bridge on the hv toroid , so far there is not enough amp to break my diodes they just keep the voltage within there respective specs , that is when the voltage exceeds there limits .

Some diodes will drop the voltage anyway and there is sometime a over 20 volts range between 2 bridge.

Mark

1n4001 are 1 amp 50 volts. You need a new bridge !!!!!

[jeanna]

...

Mark

1n4001 are 1 amp 50 volts. You need a new bridge !!!!!

mmm, guess so.
It is a good thing I waited on my next order! I will add them 4007 or better.

thanks,
jeanna

here from allelectronics
4007 1,000 volts 1 amp, 6/$1
1N5408 1,000 volts 3 amps,  3/$1