Joule Thief

[jadaro2600]

@ jadaro2600

About how many volts difference do you get?

Measurements were, 165v to 160v, a 5volt difference ..this isn't substantial, but, my setup doesn't incorporate a secondary, I guess I should just wind an MK2 and get it over with.  OR one 7,7, coil type.

I just keep getting bad results on these toroids that I purchased.

[jadaro2600]

unfortunatly, it will not.

transformer are the worst, the most energy waisting, componants in electronic, even when made carefully.
well..., not exactly true, they come second, just after low value load resistors.

the jt circuit secret is that it step up the voltage without a transformer.
but sometime, most of the time, we can't avoid using transformers.
what electronic componant can support very fast repetive high currents spikes...

The horizontal scanning transistor for a cathode ray television, or the deflector transistor for the same.

Try the NTE89! ..here's a datasheet  http://www.datasheetcatalog.org/datasheet/nte/NTE89.pdf, I have one, it costed my $10 us, but I think it's well within the parameters of joule thief lunacy.  I'm itching to try it, I'm thinking of using it with a 12v source, or a 6v source, to try and light up form long cfls.. hehe, the not so compact florescent lights

[TheNOP]

Ou is easily obtained with the right control electronics and power sources . .....flip flop flip flop 2 sources  0 volt electronics .Yes there is such a thing much like a young effect .one of the keys in this setup is to oscillate at the lowest possible voltage and current . an example is  a zero threshold voltage n-channel FET .. These are new on the market and can oscillate at0.16 volts .. 

the "flip flop", for lack of better term, Dr Stiffler concept, seem logical, it look possible, promising.
the young effect, is predicted by physic laws, so it look possible to me too.
if not decide other wise by mother nature...

the question is: why are those 2 techniques are not at an application level as the jt is ?

i can anticipate currents limitation due to capacitance needs, at least in the first technique, but the question still remain.

i am focusing on the jt, but be sure that i keep those in the back of my mind for later.

The horizontal scanning transistor for a cathode ray television, or the deflector transistor for the same.

Try the NTE89! ..here's a datasheet  http://www.datasheetcatalog.org/datasheet/nte/NTE89.pdf, I have one, it costed my $10 us, but I think it's well within the parameters of joule thief lunacy.  I'm itching to try it, I'm thinking of using it with a 12v source, or a 6v source, to try and light up form long cfls.. hehe, the not so compact florescent lights

it does not fit my current need of a mk style transformer.
but might become handy later for up to 600v applications, mk style.
thanks

might be better for cfls application then a toroid.

it need at least 5 volts 200mA to trigger the base, 5 volts is also needed for a 556 timer. 
we will not be able to trigger the base with a coil with transistors like this one...

[stprue]

@Hazens & @Jenna

Thank you for your responses.  Hazens I have made a not so accurate version of your 7-7-70 and I can get around 111v DC with it.  I am just blown away that Mk1 and others are getting upwards of 850v DC.  I wish I had more time to tinker.  I will post some pics with voltage data at some point soon!

[TheNOP]

I just keep getting bad results on these toroids that I purchased.

i missed this one and, if i am remembering right, it is not the first time you say this.
but one thing came to my mind this morning.

you are probably basing yourself on the maximum spikes voltage you can get without a pickup coil then with one in place.

more loss is truly to be expected, but the reasons you came to that "big loss" conclusion might be flawed.
what you seem to take for a big loss is not the real loss.

one example of what i mean is this:
the pickup coil, under load or not, (more under load because of how the primary is made) affect the frequency of your jt.
if the frequency is not the same when you are taking your measurements,
then you are comparing apples to oranges.
it is not the real loss.

when i said "be methodic in your experimentations" it mean change only one parameter at a time.
if adding a component change a key factor, you must find a way to make that factor back to what it was before even thinking of taking measurements..


ask yourself what you are trying to do and be practical in the way to achieve it.
ex: for what applications do you want to use your jt ?
i respect your idea of eliminating losses at all cost but...
using a $10 transistor to light a $3 4" cfl is not what i call very money wise.
it is for sure one of the ways to skin a cat tho.  

what transistor would it need for a 110 volts motor, do such a transistor currently exist ?
that is just one of the reasons i am going with the mk transformer style.