Successful TPU-ECD replication !

[Jeff B]

@Otto

Yes I agree with most of that.
Probably my statement was too condensed, without any real explanations of my thoughts behind my (brief) statement.

Firstly - In the end, Everything WILL Be SINE WAVE - Agreed.
Nature runs on Sinewaves, not Square.

Probably, what I meant was more along the lines that a Square Wave contains ALL (sinewave) frequencies, therefore the correct one for the TPU will be in the mix somewhere - We just have to find the Exact ones, and get them in workable levels.
The square wave was just a convenient way to inject something that was required in to the coils.

My statement (about the tube amp) of ""Throw enough power into it until we get something out"" is probably most of what has been rolling around in my head for a long time now.

But your reply showed me more of your thinking on this...
You have been concerned that every time you got close to the correct frequencies, the levels coming back blew the guts out of your Fets.
Valve are a perfect choice to replace them - No argument here.

But - I would like to say this:
My suggestion is to Forget about trying to create a Valve Oscillator - just for the short term.
Use your signal generator (sinewave) to do the frequency, and the amp for the power & robustness to deliver it to the coil.
This will save lots of time trying to create oscillators, and give you stable frequencies to test with.
- Just for Ease of use, and Time/Labor savings -
This would allow you to concentrate on what the TPU is doing, rather than what your oscillator circuit is doing.
Basic oscillators can drift off frequency, which will make it harder for you to pin-point the correct freq's, if you can't stay on them.
Once you've found the frequencies required, then spend your time re-building your valve circuit to be the oscillator.

I don't want you to think I'm against using the valves for the power levels either, I just think that Massive Power injections WON'T be necessary one you find the right freq's.

Also, I still believe that if you took a small feedback coil from the TPU & used it for your valve input, the Natural Resonant Frequency might show itself in there somewhere. Some filtering might be required to limit/narrow down the used freq's.
Possibly, you might need several feedback coils with their own filters, to pick off the multiple freq's required - but it might just help show you what you're looking for. (??) 

If the TPU took off, and the gain hit the roof, so what - It won't blow the valve !
At that point, you could pull back the gain of the amp, until you find out how much/little drive is really required.

Keep up the good work.
Jeff.

PS: I would NEVER mention Batteries...

[otto]

@Jeff

Yes, youre right: squares contains ALL sinewave frequencies. And this is what I DONT need.

About the .."enough power in until we get something out" ....I SAW THE POWER DELIVERED FROM A LITTLE 6" TPU!!!! AMAZING, NEVER SEEN BEFORE!!

I see youre a fast one like Im. Yes, I will work on my SS oscillators to get sine waves and I will work on my tubes to also have tube sine waves oscillators. A double work. No problem!! I have time and Im willing to do ANY needed job to finish my TPU.

You think the TPU wont blow the tubes??? HA!!!! If not the tubes, then everything connected to the TPU, as always: bulbs, scope....

@All

As I have a lot of time on my workplace (thanks God) Im reading the SMs papers (again). What I saw??

I SAW THAT IM A BIG IDIOT.

I IGNORED "MY" MASTERS WORDS:

COLLECTOR: it is 3 separate coils of multistrand copper wire (why have I only 2???) laid one of top of the other (here a little secret: height of the TPU 44mm. Distance between the collectors = 22mm)
not interlieved. 3 is important. You can do many things with 3 coils: you can run them in paralel.....(its a Mobius)

CONTROL: vertically wound in several segments (3 as I see in my tests) arround EACH of the horizontal collector coils( Arround each is for a better "contact" of the collector - control setup). Other control WIRES are wound arround ALL of the horizontal collector coils together (yes, it looks Im old and forgot this coils).

Now there is only 1 problem: the construction!! Dont even think that a TPU is mechanically wound in an "oridinary" way. Dont forget that we need a vibration.Hmmm....vibration. Lets think about this: with square wave kicks I never saw or could hear a vibration but with sine waves....with a special coil winding technique its not a problem to have vibrations.

Please, dont even think I have some "special" informations. NO WAY. The point is that even when I see a coil I want to pulse it. As we all know our master was a TV repair man in the early days of tubes, and a TV has a deflection coil and this coil is GLUED to the screen....you know why??? It would vibrate away!!! The outer coil of a deflection coil is 44mm high, the distance between the cathode and plate in my 12AU7 (ECC82) tube is 22mm....but all this you already know.

Otto

[giantkiller]

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[acerzw]

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[John M]

Unfortunately I have allot to learn yet. I still want to stick with SS for now which I have started. I am trying to fuse, isolate the circuitry as best I can to prevent having to replace my MOSFETS.Using sine waves instead of square waves might help alleviate blowing up parts.

Is there an advantage to using iron wire as the collector as compared to copper?

Its great that there are people here that you can learn from.

John