Successful TPU-ECD replication !

[turbo]

well Otto,
what type of oscillator are you planning to build then?

M.

[otto]

Hello all,

@Marko

"something" without an input from a oscillator. I dont care if its a Hartley, Collpits......I just need nice sine waves and of course, I need to change the frequency.

The pictures for the oscillators you showed us are great but the values for the components are missed.

Yes, I have a few shematics but the frequency ranges are not good enough. As you know we need at least a frequency range up to 1MHz. Then we must be able to change this frequency....you know what I want to say.

This morning I burned another MOSFET, )(/&%&, grrrr....

Thanks.

Otto

[turbo]

well it is really in the variable capacitor and the coil part that is responsible for the output frequency.
the other parts primarily feed back energy so the oscillations do not die out.

there are many types of oscillators.
i will see if i can find a simple one with the values on the parts.

M.

[otto]

Hello,

I would prefer the red picture.

Otto

[turbo]

The bigger the coil and capacitor are, the lower the frequency.
The smaller the coil and capacitor are, the higher the frequency.

The frequency of an oscillator with unity coupling depends only upon the inductances and capacitances in the circuit and not all upon the tube parameters..

Maybe you can add a voltage regulator bacause this can also stabilize the frequency.