@xee

I don't think 1.4 , is indicative of a resistor , but that is just me ...

I hope this helps , but i think you already know ... Maybe try the ground post from the primary.

The high voltage is usually is a negative one . One of the primary tap is also the secondary input , i guess you checked it ?

Mark

@ Pirate88179

Quote from: Pirate88179 on August 09, 2009, 02:05:36 PM
Is 350-400 volts enough to generate a small spark over say.... about .003" gap? 

300 volts in the Fugi 64 uF capacitors make a good size spark. But I do not think you can put 300 volts into your supercaps.

OK everybody,
I just made another video about the Radiant Joule thief.
I used the Biggo joule thief set with 240T MK1 type secondary, and 2 different Stubblefield generators. (the 3rd from the last video is in the ground!) I show the fluoro tube lit as well, but having only 2 hands and needing 3 to hold the camera and 2 to turn on the tube, I had to get it lit offstage, as it were.

http://www.youtube.com/watch?v=jjgldKgRU9w

@Bill,
Thanks. I actually thought that video was unclear both visually and in meaning, so I am glad to hear I was wrong.

About the spark needing 300v.
I was playing with the nongalvanic stubblefield last year. I was putting a battery through it and turning on a motor which would fill a cap and run ever so long.....
Often, I saw a spark as I approached the battery terminal for another hit. I doubt I even had 300v. Probably 150max.

@Xee2,
The fact is that the joule thief is lousy replacement for a battery in a system that needs one.
I suspect you are having a poor response for this reason, however, you may be exactly correct about the resistor.

Here is why...
When I bought my ultra cheap ignition coil the salesman wanted me to understand that this one did not come with the resistor which is a customary part of most ig coils. This one I was buying, being very cheap did not come with it and for $5 more, I could buy one.
My guess is that yours came with one.

jeanna

Jeanna:

Thanks for your reply.  The Fuji is downstream from the ultracap and the camera cap would be added after that, so I would not attempt to put that much voltage through any of my supercaps.

From what you say, it sounds like a good experiment to try, so I will.  What could go wrong? ??? Ha ha.

Thank you.

Bill

@ Mk1

The + pin is the coil ground. The HV is between center pin and + pin.

I think so at least. I do not want to put high voltage across oter components. They may fry.

But, since there seems to be a resistor in the primary I do not plan to do any more testing with it.