Joule Thief

[innovation_station]

How to get amps out of a toroid? hit it hard with a amperage pulse. Dont lightly hit it, WHACK it.

jim

and keep your fingers back!!   lol

ist!

[xee2]

Well, no big surprise, but the last circuit I posted with R=20 will light a 4 watt tube very dimly with only one power lead connected to the pickup coil. Also lights neon with only one lead to pickup coil.

[electricme]

@Stprue

Sorry I have to ask a dumb question...what's a MOT?

Not a dumb question, MOT's are
Microwave Oven Transformers

Would you like one?  I have a few more to add to the pile

jim

[electricme]

i was just over to a friends not long ago he says youll love this toy i have ....  lol 
he says its an old battery charger form the 20's  so i had a lookie inside   well 

i almost remembered building it 

lol  but it charges 12 12 vdc batteries at 6 amp ...  has 1 huge rectifier tube in it .... 

so lol he has a hole pile of toys for me to play with ....  ill snap a few pics of the charger it works on battery resosnance ...  cource tune then fine tune ...  hummmmmm

so you want to close the loop .....  got a few relays ... OOOOooooo the tesla switch  ...

Ohhh IST! I would love to go and play at your friends house, all that loverly stuff from the early days of valves that glow in the dark, nice.

Now, a rectifier tube filled with mercury as the rectifying element, ha ha, yes the way to go.
The oldern days radio web sites have lots and lots of loverly tooobes.

jim

[electricme]

@TheNOP,

for mag field creation coils, do not wind a second layer backward over the first one.
@all
someone disassembled a scanner lately ?
i found nice things in a broken one.
tiny neons tube and their source circuits.

Thats right, you get more current out of a single layered coil.
The more single coils you put on, the lower the voltage you get back out of each coil.

perhaps I should have said, if one big secondary coil output is 256v, then you decide to replace it with 4 smaller coils, each of the smaller coils = 64v. each coil had 65 turns on it.

Well, thats how it worked out for me.

I got a couple of scanners at my feet, mabe I just might pull one apart tonight lol.

jim