Lords of the Ring

[Mannix]

Jason,
another tuber...great!

Welcome to electron clouds and particle accelerators.

And the recreation of the early experimental TPU history.

When you get a power source and are setup, make a standard "hartley oscillator" with only one triode section.

You will need to find a bobbin but they are available as small smps units  usually about 25 mm in diamater ,about 30 then 90 turns will give you a good result.

You can switch between coils and change capacitance...3 otcaves is what I have ..it will depend on the circuit.

Try it and see how absolutley clean  and stable it is.

You will be surprised and pleased....no dirt .. ( phase distortion)

Each stage of mine uses 5 triode sections.(3 tubes)..then the 6as7 out put, total of seven

oscillator 1 phase splitter 2 drivers 2 ..one unused...as yet.

they are all hi mu tubes 12au7 6bq7 ..small adjustments depending on the tube...many are suitable...use what you have around.
And avoid using feed back to minimise distortion.  Thats the hard part.

"Triodes create less distortion"

My biggest problem has been getting the 7.5 amps heater current for the 6as7's....not to mention that they want only 160 volts.
so 2 supplies will be needed unless you use other than 6as7..Im going with those because they come well recommended.

Lots of 1 meg resistors and lots of .1 and .01 600v caps.

use a ss bridge,200 cap,series 5ar4,or similar another 200 cap... pretty smooth dc! That was well recommended too

good parts hunting!

Lindsay

[giantkiller]

And my update is:
I have 3 collectors stacked. Each collector has 1 segment controller, all 4 of each layer in series.
I run a frequency through the collectors and a 2nd frequency thru the control coils, all layers in parallel. There are no feedbacks connected. They are just there in the coil.
Results:
I can burn up trannys. I now get kicks no matter what frequency range I use. And the kicks eminate from the coil. You can physically feel and hear them. No tones coming from the coil.
It is a stun gun without the spark gap. The physical feelings are not as experienced as a stun gun, but they are there.
I now am going to try different jumpering. I don't think I have to though. I have the very basic and simplest wiring configuration. I am going to work on the feedback to cause a ramp up for power. All of SM's TPUs do 'ramp up'. I am going to place a spark gap between the configuration I have now and the addition of the feedbacks. Of course I'll experiment with frequency combinations.
The effort has been to try to get power out. I'd be a fool to enter a skateboard into the Indy 500 or expect to throw a Frisbee to the Moon. Get the circuit to ramp up and let the power come from where it is instead of trying to generate it.

--giantkiller. It already exists.

[Jdo300]

Hi Lindsay,

Thanks for the suggestions on the components. Didn't Mr. Mark say not to use any SS stuff in the circuit since the TPU would interfere with it? Are you sure there won't be any problems with using a SS rectifier rather than a tube rectifier? If true, then I'll be happy to avoid the extra work with the diode tube.

God Bless,
Jason O

[Mannix]

Jason,
the ss bridge is effectively isolated by having an electron cloud in series with it.. My thoughts were the same  at the time also.

Experience has shown that the adverse effects are on sources,out puts and, my frequency meter !.... blinded by the light?

For some, tubes seem a step backward but as soon as you see how stable the platform is you will go....oh that must be why he said tubes..so long ago.

I shared this reluctance for many months.

Lindsay

[MrMag]

I know it's fun to build but wouldn't an old tube sine wave generator serve the purpose?
I found an old Heathkit model IG-82 on eBay for about $30.00.
I've attached the schematic if anyone is interested.