Joule Thief

[jeanna]

@jeanna
...

But honestly tell me have you ever tried tuning the way i described it page 478, if not cool by me be tell me why ?

I have done this over and over.

In fact I was doing just that when I first noticed the voltage goes one way the frequency usually goes the other.
When the frequency does not, the wave is so unusual, I believe that the reason it appears that way is that the scope cannot deal with it right there.


I have done it many times and you seem to always think I do not.

jeanna

[Mk1]

I have done this over and over.

Many times and you seem to always think I do not.

jeanna

I am sorry then !

But you did not get better results ? even with more turns and checking the pot? Then this is a strange toroid , its look like it like it slow . Low hz.

Mark

[resonanceman]

But honestly tell me have you ever tried tuning the way i described it page 478, if not cool by me be tell me why ?

Mike

I do not do it exactly  the way  you  describe .........    But  I  do use a pot rather than  a resistor .........I try the full range of the pot each time I make a change to my circuit  ............ANY  change .

I also  try a few  different  caps .

I  have  one meter that I always  keep  hooked up to show the  battery current ..........  If I am doing  feedback I keep another meter  reading  battery  voltage 
A 3rd  meter  is  used for  output  voltage or whatever I need  at the time

In my opinion   trying to  tune  a  JT  without a pot  and  a meter or 2  would be kind of  like trying to put  a jigsaw puzzle together blindfolded


gary

[Mk1]

Mike

I do not do it exactly  the way  you  describe .........    But  I  do use a pot rather than  a resistor .........I try the full range of the pot each time I make a change to my circuit  ............ANY  change .

I also  try a few  different  caps .

I  have  one meter that I always  keep  hooked up to show the  battery current ..........  If I am doing  feedback I keep another meter  reading  battery  voltage 
A 3rd  meter  is  used for  output  voltage or whatever I need  at the time

In my opinion   trying to  tune  a  JT  without a pot  and  a meter or 2  would be kind of  like trying to put  a jigsaw puzzle together blindfolded


gary

I could not have said it better Jerry !

Mark

[gadgetmall]

@ Friends . Off Topic as i Mostly will always be. I am OK today . I had another attack yesterday and was in so much pain i couldn't stand any more stress so i took a day and half away from the computer . School is out tomorrow for My Little girl (7)and there was awards and ceremonies and water day and this and that and this Ole guy has a bit more than most of you to chew on so excuse Me .She did get a Peer award for Outstanding Character  and accelerated reading  presidential award so that shows i am a good parent and father even at 52 .You Damn Right I'm Proud of her .I do not like being told what to do cause  I had 32 years with a red head who was  a dead head  and had enough of that crud to last a life time .I'm on a hair Trigger from a Stress related Stroke . Don't mess with me or my Head as it could get nasty . I am Not Normally like this . I am Quiet ,kind ,cheerful ,funny and focused . Not lately.   
@Jeanna . The Reason your secondaries are not adding up is like Mk1 said they are out of phase and cancelling each other out . you have to go to the primary and try all 4 ways of of hooking that up and trying your secondaries in series and that's another 2 ways of doing  that . one of them will hit it so it adds up . SO you have a total of six ways to hook that jt up so its phased properly .
Albert
AKA the Gadget