Pictures and circuits of my DIY class D and other projects.

classd_fromru · 7th December 2006, 10:03 AM

Hi All!
You can look at my DIY projects on my website http://www.classd.fromru.com

2 UcD amps (pics, circuits+pcb)

:

http://www.classd.fromru.com/circuits.html

PS. sorry for my bad english

RX5 · 7th December 2006, 10:13 AM

I wish it WAS in english.... or is my browser bad?

and add to that , SMTs... man!! I congratulate you....

classd_fromru · 7th December 2006, 11:09 AM

yes, all articles in Russian. But i think the main thing - circuits and pcb

TroelsM · 7th December 2006, 11:13 AM

Hi.

Thank you for the nice pictures. Inspiring!

Some word about the construction-details would surely be good to have.

Your SMPS seems to be unregulated and with a toroid-transformer. Whats the regulation on the secondary-side and how do you maintain proper isolation between primary and secondary windings?

Regards TroelsM

classd_fromru · 7th December 2006, 11:41 AM

TroelsM,
i dont like stabilized SMPS. This SMPS without feedback.
I calculated turns in the special soft for transformer.
Primary winding isolated with insulating tape.

TroelsM · 7th December 2006, 11:58 AM

Hi.

How much does the secondary-voltage go down when the supply is heavy loaded?

I would guess that its drops quite a lot as there's no regulation and probably a pretty poor coupling between prim and secondary-windings.

Maybe that doesn't matter much with classD?

Your page would be top-notch if you added a bit of English text and some measurements of SMPS and classD.

Regards TroelsM

edl · 7th December 2006, 01:17 PM

Great site, thanks!

Keep on work!

classd_fromru · 7th December 2006, 01:18 PM

TroelsM,
This smps was developed for tda8924 some months ago.
Without loading a voltage output about +- 25-26v on the maximal loudness nearby +--22-24.

You can read articles with some on-line translator.

Measurements I shall do later, after assembly of the new version pcb of UcD.

Baldin · 7th December 2006, 06:16 PM

classd_fromru
Super Cool. Great work.

classd_fromru · 7th December 2006, 06:48 PM

Baldin, thanks! i tried

7th December 2006, 10:03 AM	#1
classd_fromru diyAudio Member Join Date: Nov 2006	Pictures and circuits of my DIY class D and other projects. Hi All! You can look at my DIY projects on my website http://www.classd.fromru.com 2 UcD amps (pics, circuits+pcb) : http://www.classd.fromru.com/circuits.html PS. sorry for my bad english

7th December 2006, 10:13 AM	#2
RX5 diyAudio Member Join Date: Apr 2004 Location: TaC	cool I wish it WAS in english.... or is my browser bad? and add to that , SMTs... man!! I congratulate you.... __________________ RoCk On!!! I love my diy UcD!!

7th December 2006, 11:13 AM	#4
TroelsM diyAudio Member Join Date: May 2003 Location: AARHUS. DK	Hi. Thank you for the nice pictures. Inspiring! Some word about the construction-details would surely be good to have. Your SMPS seems to be unregulated and with a toroid-transformer. Whats the regulation on the secondary-side and how do you maintain proper isolation between primary and secondary windings? Regards TroelsM __________________ Need more time...

7th December 2006, 11:41 AM	#5
classd_fromru diyAudio Member Join Date: Nov 2006	smps TroelsM, i dont like stabilized SMPS. This SMPS without feedback. I calculated turns in the special soft for transformer. Primary winding isolated with insulating tape.

7th December 2006, 11:58 AM	#6
TroelsM diyAudio Member Join Date: May 2003 Location: AARHUS. DK	Hi. How much does the secondary-voltage go down when the supply is heavy loaded? I would guess that its drops quite a lot as there's no regulation and probably a pretty poor coupling between prim and secondary-windings. Maybe that doesn't matter much with classD? Your page would be top-notch if you added a bit of English text and some measurements of SMPS and classD. Regards TroelsM __________________ Need more time...


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7th December 2006, 11:09 AM	#3
classd_fromru diyAudio Member Join Date: Nov 2006	yes, all articles in Russian. But i think the main thing - circuits and pcb

7th December 2006, 01:17 PM	#7
edl diyAudio Member Join Date: Oct 2004	Great site, thanks! Keep on work!

7th December 2006, 01:18 PM	#8
classd_fromru diyAudio Member Join Date: Nov 2006	smps TroelsM, This smps was developed for tda8924 some months ago. Without loading a voltage output about +- 25-26v on the maximal loudness nearby +--22-24. You can read articles with some on-line translator. Measurements I shall do later, after assembly of the new version pcb of UcD.

7th December 2006, 06:16 PM	#9
Baldin diyAudio Member Join Date: Jan 2005 Location: Copenhagen	classd_fromru Super Cool. Great work. __________________ Visit www.sensibleaudio.dk or read latest news on Baldin's Blog

7th December 2006, 06:48 PM	#10
classd_fromru diyAudio Member Join Date: Nov 2006	Baldin, thanks! i tried

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