Topology Federmann, HQQF-55 ... - Page 3

PMA · 31st October 2009, 09:33 PM

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 · 31st October 2009, 10:12 PM

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

When everything is ready, will the measurement results.

SY · 31st October 2009, 11:39 PM

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 · 12:21 AM

Quote:

Originally Posted by PMA

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 · 1st November 2009, 06:33 AM

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 · 1st November 2009, 11:32 AM

Quote:

Originally Posted by stinius

Pavel
SY you are in a hurry?

Cheers

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

Upupa Epops · 1st November 2009, 11:53 AM

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

PMA · 1st November 2009, 12:06 PM

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

Federmann · 1st November 2009, 12:18 PM

Quote:

Originally Posted by 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 · 1st November 2009, 12:21 PM

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

31st October 2009, 11:39 PM	#23
SY diyAudio Moderator Join Date: Oct 2002 Location: Austin, TX Blog Entries: 1	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. __________________ "...we stumble and get up, we are sad, confident, insecure, feel loneliness and joy and love. There is nothing more; but I want nothing more.” - Christopher Hitchens 1949-2011

1st November 2009, 12:06 PM	#28
PMA diyAudio Member Join Date: Apr 2002 Location: Prague, Kitakyushu, Fukuoka	Federmann, you have shown simulations in MicroCap. Could you also show THD spectrum analysis of output voltage at 10kHz/30V/4ohm load, please? __________________ Pavel Macura, consultant http://cz.linkedin.com/pub/pavel-macura/4/783/637

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31st October 2009, 10:12 PM	#22
Federmann diyAudio Member Join Date: Oct 2009	Your care is really nice, but you not have noticed that I use 100μm copper. When everything is ready, will the measurement results.

1st November 2009, 06:33 AM	#25
BV diyAudio Member Join Date: Sep 2005 Location: Trnava, Slovakia	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.

1st November 2009, 11:53 AM	#27
Upupa Epops diyAudio Member Join Date: Aug 2003 Location: Prague,Czech Republic	We, Pavel and me, are not greenhorns, SY....later you will see, whatabaut we talk...

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