Joule Thief

[jeanna]

did you look at the currents too ?
the frequency will be lower with the pickup under the load of your ampmeter.

and what about when it is 1.40kHz ?   

No currents.
I was just tuning the jt primary, and determining the optimum number of turns for this toroid called 'filter'.
I wanted to add the relationship of frequency in there separately tonight.

Remember, I do not have an amp meter. I just use the 10 ohm resistor at the + battery lead in series to the meter.

What do you mean, and what about when it is at 1.4kHz?

@Hazens,
good job. 25 in series.
Did you stop when the lights dimmed?
Soon we will be able to light those christmas strings from our own wound toroids!

jeanna

[dog812]

@hazens
Nice work.. that torrid is awesome!

[TheNOP]

Remember, I do not have an amp meter. I just use the 10 ohm resistor at the + battery lead in series to the meter.

oops, i forgot

What do you mean, and what about when it is at 1.4kHz?

same numbers of turns but not in 2X formation.
you had 1.4kHz in one of your previous post picture.

So, I can get higher frequency or higher voltage.
One goes up when the other goes down.

is this still true at 1.4kHz is what i meant.

[jeanna]

same numbers of turns but not in 2X formation.
you had 1.4kHz in one of your previous post picture.
is this still true at 1.4kHz is what i meant.

OK I will check that out it is in the next breadboard over.
I am starting to have a real estate problem. breadboards on the kitchen table... eating on my lap...


jeanna

[jeanna]

@theNOP
I don't know what the 1.04kHz was you were thinking of.
I think it was the MK .8
But that was not 1.04 kHz.
Anyway The MK .8 with 20 up and 20 down across 20 up 20 down in 2 examples of base resistance shows:

21kHz
126V
36ohm base resistance

50kHz
95.7V
973 ohm base resistance

It appears so far that as the base resistance goes up the frequency goes up
As the frequency goes up the voltage goes down.

This is a sampling of 13 tests so far all are the same way.

thank you,

jeanna