Thane Heins Perepiteia.

[Groundloop]

@aether22,

It is a very simple circuit so I can't see the problem of understanding it. The transistor forms an oscillator together with L1 and L2. The frequency is set by the LC value of L1/L2. The input current is set by the value of R1. C1 is a autostart capacitor, meaning the circuit will self start because C1 is charging up via R1 to plus rail. When the capacitor passes 0,7 Volt the transistor turns on.  A pulse in L2 shuts off the transistor and the oscillation goes on.  I use this oscillator as a input sourche to the coil because I do not have an signal generator.

@Heinstein,

I tried to load both coil with a Neon Bulb. I also tried in series and in parallel. The open ended voltage output on the coils depends on the input and the position of the center input coil. With 12 Volt 0,1 A input I got close to 130 VAC on one coil and 100 VAC on the other. This was at 0300 last night and I need to make more measurements. I also think I have a too big airgap between the input coil and the core so I will make a new air core coil and test that. Then I will put resistors on the output coil and do some measurements. It takes time. I do not think people on this forum really know how much work is it to thread 2000 turns of wire onto that core. (2 x 1000 turns.) 

Groundloop.

[LarryC]

Hi All,

For anyone having trouble fitting the primary within a toroid due to the wrapping sizes, an alternative can be made. Take the E's from an EI transformer and remove the center of the E so that you now have a C. Wrap the center and stand it up inside the toroid with the center above the toroid. The flux will still take the path thru the toroid from the lower side of the C as it will be more permeable than the airgap at the bottom of the C. This should resolve the lack of space for the wrapping problem and work almost as well as a straight primary. Many sizes are available.

Regards, Larry

[Heinstein]

@Heinstein,

I tried to load both coil with a Neon Bulb. I also tried in series and in parallel. The open ended voltage output on the coils depends on the input and the position of the center input coil. With 12 Volt 0,1 A input I got close to 130 VAC on one coil and 100 VAC on the other. This was at 0300 last night and I need to make more measurements. I also think I have a too big airgap between the input coil and the core so I will make a new air core coil and test that. Then I will put resistors on the output coil and do some measurements. It takes time. I do not think people on this forum really know how much work is it to thread 2000 turns of wire onto that core. (2 x 1000 turns.) 

Groundloop.

Dear Groundloop,

May I suggest that 1st you try:

- Running your outputs in parallel through one ceramic 25 W, 1k load, then 100 ohms and check the 
  voltage across the loads and calculate P = V^2/R.

- Assume your power factor is 1 (has to be 1 or less) and record input volts and amps to
  give you a max input power.

- Compensate your ?too big? air gap with a ferromagnetic shims for now.

- You need to see what your voltage is across a resistor,
and
- You need to determine if your primary is isolated or not ? current increase w/ load = secondary 
  Back EMF in your primary.

Also can you increase the turns on your Toroid to show an output power increase with a fixed input power? If you can do this then you are proving the concept! You can run your new winding right on top of the present ones and show :

TEST # 1
i/p P = x W with x turns secondary, o/p P = y W

TEST # 2
i/p P = x W with 2x turns secondary, o/p P = 2y W

I would avoid an air core as your input power will be through the roof, however on the other hand, you can use it as a variable inductor and insert various amounts of ferromagnetic material into it to give you the best performance for your set up.

After you have spent 11 months winding and unwinding coils as I have with the transformer ? you will understand why I am ?copping out? and going to computer modeling instead. BTW I spent 7 years (full time) winding ? unwinding ? winding ? coils for the generator until I was able to produced results I was happy with.

Also I prefer Thane - as Heinstein is my nickname I was given now but I am not sure if it was in jest or not (seems a bit presumptuous) but at least it is better than Frankenstheins.

Cheers
Thane

[bluedemon]

Using one end of a flynn parallel path device as the primary could be interesting. 

[Groundloop]

Thane,

I know computer simulations is one way but nothing compare to the real coils. LOL

Yes, I will measure with resistors on the output coils. Just said that in my most resent post.

Groundloop.