Regeneration and the Toroidal Power Unit

[EMdevices]

I think it behaves very simular to NTE2343 (NPN)Ã,  or NTE2344 (PNP)

I measured the base current amplification constant, and I want to say it was under 100, maybe 70,Ã,  the NTE2344 shows 20 for the h_fe constant.

The inductor I pulled from a monitor board, and then I added a few turns to it of pretty thick wire (cause that's all I had around, but it can be small for the trigger circuit works with small currents)

These are not hard to build Dave.

The hardest thing is to get the right capacitor and resistor in the base circuit.Ã,  I played around with these untill I got something that worked for me.Ã,  If you use too drastic values it might not start to oscillate, but that is pretty rare in my experience.

Right now, I'm going to take a breakÃ, 

I've been up till 3 in the morning with excitement, slept for 4 hours and now I'm back at it, but I'm getting tired so I'm going for a walk, a good meal, and a nap.Ã, 


EM

[CTG Labs]

Ok EM,

I still have the coil I wound for my blocking oscillator before and I have various cores laying around, won't take long!


D.

[turbo]

okay i got it to work, i need to fix the value of the resistor because when i fire it up it starts to sing and imediatly shoots up to about 70Khz and the voltmeter is set to 600 Volts and it goes off scale so i need to tweak it abit.

Marco.

[EMdevices]

Wow, pushing 600 Volts are we.   Ha  Ha   

Going for that 100x   OU factor right?

Enjoy guys,

I'll be back soon.

EM

[CTG Labs]

Marco,

Here you can move a magnet nearby to change the permeability of the core and change the frequency, but this may mess with the "EM effect" I guess!



D.