audio amplifier as a power generator (instruction)

[stivep]

Please read  first and look at photos  here:
Re: audio amplifier as a power generator (instruction)

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For these who don't want to build anything
go for that:
- and try to  modify it into  a little lower  frequency.
My   generator works from 9kHz

note; some of  you keep forgetting that  universal load impedance  for all devices is 50 Ohm.
there you go  1kW  where  regulated impedance is from 50 to 600 Ohm
and frequency is from 9kHz to 125kHz
linear!!
- right out  form the box.

If you think that it is expensive  -you are absolutely wrong.
It is only the  matter of right time and  place.
- the price can be as low as $100 too.

Wesley

[stivep]

Please read  first and look at photos  here:
Re: audio amplifier as a power generator (instruction)

The same concept is present in any range of frequencies:
Below you have an example of an  linear amplifier  used by me
in the lab from 5MHz to 600MHz.
On the top there is  motorized  manual  transmatch - impedance matching  box
-and  only difference  is the frequency of operation ( the presented Transmatch  operates  at HF  frequencies)
But changing a coil and adding some capacitors make it works much lower  than that.
Wesley

[kolbacict]

But I need not just a generator with a powerful output.
But tunable in the audio frequency range, and having a three-phase output with a stable shift of 120 degrees when tunable in frequency.  This is problem. The industry does not produce that.
To do this without resorting to digital circuitry, DAC,DDS, e.t.c.

[stivep]

Please read  first and look at photos  here:
Re: audio amplifier as a power generator (instruction)

But I need not just a generator with a powerful output.
But tunable in the audio frequency range, and having a three-phase output with a stable shift of 120 degrees when tunable in frequency.  This is problem. The industry does not produce that.

https://www.diyaudio.com/community/threads/phase-shift-in-class-d-amplifiers-how-it-affects-the-sound.321578/

We need any DSP with 1st order all-pass filter with F=40kHz(Fs=>96Khz, 20khz will be also about -70deg), and golden ears. I know, I'll not hear the difference

Relative phase is audible, depending on the amount, the frequency and the context. Two speakers side by side with 90° phase shift between them will sound dreadful

another option is that:
http://www.supremetechnology.com.au/product/omicron-cms-156-3-phase-voltage-and-current-amplifier.aspx?Id=1917
https://assets-us-01.kc-usercontent.com/ecb176a6-5a2e-0000-8943-84491e5fc8d1/a01afacb-01ac-4990-9315-6e4697aa79b2/CMS-156-Technical-Data-ENU.pdf

Wesley

[stivep]

Please read  first and look at photos  here:
Re: audio amplifier as a power generator (instruction)

But I need not just a generator with a powerful output.
But tunable in the audio frequency range, and having a three-phase output with a stable shift of 120 degrees when tunable in frequency.  This is problem. The industry does not produce that.

https://www.youtube.com/watch?v=B16GBwQ4zKI&t=124s

Phase shift  for kolbacict :
https://www.allaboutcircuits.com/technical-articles/understanding-phase-shift-in-analog-circuits/

This is going to model some source circuit (like an amplifier) with an output impedance of 50 Ω

What should be clear here is that the circuit, essentially, is an RC low-pass filter made of R1 and C1.
We know from basic circuit analysis that the voltage phase shift in an RC circuit will vary from 0° to -90°, and simulation confirms this

.


My assumption is that in  Russia  The industry does not produce that.
I don't understand :
Why  are you still there my friend...
I don't understand  what keeps a  person in the s*ity (Дерьмо реальность) reality  of Russia?
Even if  The beautiful West is not for you - it is a future for your children or you don't care about them much?

Wesley