Parts list for the schoolgirl circuit

[D Rhodes]

I think the 1N4007 is 1000volts whilst the 1N4001 is only 50Volts...probably the 4001 is ok for the small 23#power 26#trigger bifilar coils, but with the 8filar 20#power/23# trigger coil in the Beginners Handbook, need to use the 4007. My thoughts only

[lis_wang]

Welcome,

only a few parts are needed for the Sg circuit. They are as follows:

transistor-mjl21194 or 2n3055- mjl is best
diodes-1n4001 and 1n4007
resistors, 100 ohm 1/2 watt and 1k ohm potentiometer same wattage
a single Ne 2 neon without the inline resistor
a grain of wheat bulb, available at most hobby stores, they are used in HO scale train sets for train headlights and running lights. get the smallest wattage you can find.

Tom C

http://energyscienceforum.com/files/...0datasheet.pdf

In the beginner handbook, it recommended use 14 pieces of 1N4007 diodes, not 1N4001. I believed to use 1N4007 replace 1N4001. But you recommend still use 1N4001 for trigger circuit. Please clarify which one is better?

[Branch Gordon]

Right on...I'll grab the 20 and 23. Thanks for the clarification.

Branch, I would save the #18 for a bigger machine. The tests we ran in John's shop last week showed that for a 13Ah garden tractor battery you should use #20 for power and #23 for trigger.

John K.

[John_Koorn]

Branch, I would save the #18 for a bigger machine. The tests we ran in John's shop last week showed that for a 13Ah garden tractor battery you should use #20 for power and #23 for trigger.

John K.

[Branch Gordon]

Well...here's why I asked. I am in the process of revamping my build based on you and John's suggestions in my other thread.

I bought a couple large 18awg coils, so I could wind up an 18 power/18 trigger coil at 1.2 ohms. I was planning on using the 13ah garden tractor batteries with it. Is this gonna be ok for just a bifilar coil?

[Tom C]

Wait...what happened to 18 guage wire, 150 feet, 1.2 ohms?

From what I have seen the last few months that is the advice that everyone has been given. Why the change?

that will work also. look at jb's latest post, of his latest filar energiser. my 6 coil is all 18 awg. it is about the resistancein the coil and the inductance. bigger wire coil bigger batteries.

Tom C

[Branch Gordon]

Wait...what happened to 18 guage wire, 150 feet, 1.2 ohms?

From what I have seen the last few months that is the advice that everyone has been given. Why the change?

start with 20 gauge power 23 gauge trigger. 130 feet 1.3 ohms 470 ohms should get you in the park for a base resistance

Tom C

[Tom C]

Hey Tom you never said what size wire to use

start with 20 gauge power 23 gauge trigger. 130 feet 1.3 ohms 470 ohms should get you in the park for a base resistance

Tom C

[spankydoodle88]

Hey Tom you never said what size wire to use

[Tom C]

Welcome,

only a few parts are needed for the Sg circuit. They are as follows:

transistor-mjl21194 or 2n3055- mjl is best
diodes- 1n4007
resistors, 100 ohm 1/2 watt and 1k ohm potentiometer same wattage for multi strand coils use 470 as a base resistance
a single Ne 2 neon with or without the 4.7k inline resistor
a grain of wheat bulb (not needed for multi strand machines) available at most hobby stores, they are used in HO scale train sets for train headlights and running lights. get the smallest wattage you can find. this goes in the trigger circuit of bifilar coil machines only.

Tom C

http://energyscienceforum.com/files/...0datasheet.pdf