Topology Federmann, HQQF-55 ...

[PMA]

I circled the track that Pavel is speaking about.

BTW - this circuit has probably never worked yet, I can see that transistors have not been inserted and soldered yet - circled as well.

 

[Federmann]

Your care is really nice, but you not have noticed that I use 100μm copper.

When everything is ready, will the measurement results.🙂

 

[SY]

Cut out the personal stuff. I'm going to be doing some severe cleaning of this thread- I hope everyone has backed up their technical content as there may be some collateral damage.

 

[stinius]

Pavel -

Of course no one here would understand because of the language barrier.

SY, I would appreciate if you could sweep the rubbish.

Pavel
I have read his site, google translate is sometimes ok. 🙂

I agree that its a lot of rubbish, but otoh this is an open forum, and I have seen a lot of other threads with more rubbish. 😀

SY you are in a hurry?

Cheers

 

[BV]

It has nothing to do with realistic construction. See e.g. for output inductors, dimensions and supposed type...DC blocking - ceramic capacitors (suplly voltage?),conected together with thick, long line, Boucherot cell too.

 

[SY]

Pavel
SY you are in a hurry?

Cheers

When you're my age, you don't even buy green bananas.

 

[Upupa Epops]

We, Pavel and me, are not greenhorns, SY....later you will see, whatabaut we talk...

 

[PMA]

Federmann, you have shown simulations in MicroCap. Could you also show THD spectrum analysis of output voltage at 10kHz/30V/4ohm load, please?

 

[Federmann]

I always look at the amplifier's own eyes. I described the causes Transistor sound here.
Federmann Bohumil. Tranzistorový zvuk počítačové simulace příčin jeho vzniku. Perspektivy elektroniky v roce 2009: 26. 3. 2009. Rožnov pod Radhoštěm: SŠIEŘ RPR, 2009, s. 19-25. ISBN 978-80-254-4052-0.
Please add your experiences.

Is not a supporter of THD measurement range, in my opinion is not sufficiently informative about the properties of amplifiers. I we will wait until everything is ready and will be measuring and listening tests.

 

[PMA]

I am also very curious to understand how your novel output stage works. It uses only N-channel MOSFETs in both push-pull halves :

 

[Federmann]

I am also very curious to understand how your novel output stage works. It uses only N-channel MOSFETs in both push-pull halves :

Technical parameters of amplifiers 4Ω
End transistors 2 x 4 x IRFP240/9240

Technical parameters of amplifiers 2Ω
End transistors 2 x 4 x IRFP240/9240

Technical parameters of amplifiers 8Ω
End transistors 2 x 4 x IRFP240/9240

PMA🙂 Library, Library Eagle🙂

 

[syn08]

PMA🙂 Library, Library Eagle🙂

Guys,

If you have any personal or commercial feud, you should take it in private. This thread has absolutely nothing to do with DIY. Even the pictures (or schematics, or whatever they were) are no longer available.

 

[Netlist]

Even the pictures (or schematics, or whatever they were) are no longer available.

They are, to me.

 

[syn08]

They are, to me.

I can't see the pictures and don't have access to the web site.

 

[PMA]

This is what Federmann has shown in his 1st post here:

 

[PMA]

PMA🙂 Library, Library Eagle🙂

Very easy to create your own library device (symbol, package, device). It might be confusing if you as a high school teacher at technical college use N-MOSFETs instead of P-MOSFETs, at least for your students.

 

[syn08]

And what is the problem? I've seen even more stupid things posted.

 

[PMA]

Federmann, you do not need no source resistors? (resistors in series with Mosfet Source, something like 0.1R - 0.2R). Your output devices are that perfectly matched?? And thermally stable?

 

[Federmann]

I, do not use any resistance, the essence of concentrations of power transistors I described here

 

[Netlist]

You will understand that the many people will not be able to read your language.
Why not give the essence in a post?

/Hugo