AC from Joule Thief Secondary/pick-up

[innovation_station]

IIL WIND ANOTHER ONE AND TAKE A FEW PICS HOW I HAVE DONE IT IN THE PAST ... 

I NEED 1 ANYWAYS ....

IS

HOW BOUT A MK3 TWISTED LITZ STYLE   PICKUP  THEN USE 1 OF THE OUT PUTS FOR TRANSFORMER FEEDBACK  TO THE OTHER WIRES ... 


ILL JUST BUILD IT AND SHUT UP NOW     LOL

[stprue]

IIL WIND ANOTHER ONE AND TAKE A FEW PICS HOW I HAVE DONE IT IN THE PAST ... 

I NEED 1 ANYWAYS ....

Thank you for your assistance

[jeanna]

Yes, stprue,
It does go down in total height of the voltage spike.
I do have an advantage because of the little scope.
I have an opinion that there must be some difference between
_____|_____|_____|_____
and
____/^{^}\___/^{^}\___/^{^}\___/

however I could be very wrong. Maybe with high enough frequency the spikes will come together and be enough.
But here is where the freq/voltage relationship comes in.
While tuning my primary and with the probe clips across the 2 secondary leads, I watched that every time the frequency went up, the voltage went down... and the reverse was true too. I was adjusting the base resistor, and I was also changing things by changing the number of turns.
So, if the frequency gets really high and the spikes are really close together, the voltage will be less too!

Now, back to your question...
You are correct.
The voltage does go down. Last week I got very upset after I had finished winding my mk1 around the biggo.
1/4 around, so up one side, the volts were around 90v. after finishing they were around 70v.
Then Mark just kept saying tune it tune it... so after I got the base resistor down to 90 ohm the frequency was down to 5.6KHz but the voltage was at 450vac. and I lit the fluoro tube for 5 1/4 hours.

OK?
Just have faith... it will be worth doing.

jeanna

[Mk1]

@all

Ok

I heard that some people around here , are having a hard time understanding my language , well ok point taken . I will try to address this situation , I believe to posses enough knowledge of this language to get my point across , but most of the time the spell check is deficient when it comes to directing me to the proper spelling word i need .

With those of my mind , i can supply all the information , any one needs , about the mk.

The first thing to understand is the jt coil location at 180 from each other , when you insert a pickup coil in the middle of them you collect 2 pulses one from each jt coils.

It can either cancel the rotation of the field or help it.

Guess which is witch?

[jeanna]

Mark,
I really do not know how to answer that question.
First if you know the answer please just say it.

Second, I do not know the answer because this thing is oscillating, and that means that something has to change a lot. so, I think the one going all in one direction would be a bad choice.
Somehow, I do not think that is correct, but really the best way to make your point is to make it straight.

So, please tell me soon which one is better.

thanks
jeanna