:: Audiotek 69 - [Technics SE-A1?] ::

dhengkoel · 3rd December 2003, 06:15 AM

Dear all;

I found this schematic that seem like Technics SE-A1, class AA. The site in chinese language: http://www.diyzone.net/sections.php?...icle&artid=149 .. If so, did anybody build this amp? How does it sound?

Regards:
ragil.hastomo

dhengkoel · 3rd December 2003, 06:16 AM

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dhengkoel · 3rd December 2003, 06:17 AM

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dhengkoel · 21st July 2004, 02:03 PM

i'm baaaackkkkkk .. knock .. knock .. knock .. anybody there?

regards:
ragil.hastomo

lumanauw · 22nd July 2004, 12:52 AM

Aneh juga ni skema.
There seems to have 2 sets of output stages. The ones with L2 maybe its the output to the speaker. But the ones with L1 is attached to CT of the transformer?

X.G. · 22nd July 2004, 04:36 AM

I have read the two articles of the link,including
http://www.diyzone.net/sections.php?...icle&artid=129

I think the project just build an amp of Leach amp units + SE-A1 topology,not clone of SE-A1.

SE-A1 topology:

Is the topology of SE-A1 similar to/same as below circuit?any comment?

http://www.ne.jp/asahi/evo/amp/2sk1380/report.htm

Steven · 22nd July 2004, 06:53 PM

Quote:

Originally posted by X.G.
Is the topology of SE-A1 similar to/same as below circuit?any comment?

Yes, but the Evolve amp uses a single ended class A output, instead of push pull for the SE-A1.

Steven

X.G. · 23rd July 2004, 01:04 AM

Steven,

Thanks for your affirmative reply.

technics1 · 26th October 2004, 09:36 PM

Here is the schematic of my two SE-A1 Amps.
This is the one and only A+ Amp Matsushita ever built.

Greetings

Dieter

lumanauw · 27th October 2004, 01:37 AM

Hi, Technics1,

Would you explain how the amp work? It has 2 set of front end, 2 set of final stage, (one is from +/-5V, other set is from +/-100V), and one final stage is modulating 0V?
Where the speakers are put?

21st July 2004, 02:03 PM	#4
dhengkoel diyAudio Member Join Date: Nov 2001 Location: CIA	i'm baaaackkkkkk .. knock .. knock .. knock .. anybody there? regards: ragil.hastomo __________________ :: The last but not least ::

26th October 2004, 09:36 PM	#9
technics1 diyAudio Member Join Date: Oct 2004 Location: near cologne	Technics SE-A1 Here is the schematic of my two SE-A1 Amps. This is the one and only A+ Amp Matsushita ever built. Greetings Dieter

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22nd July 2004, 12:52 AM	#5
lumanauw diyAudio Moderator Emeritus Join Date: Oct 2002 Location: Bandung	Aneh juga ni skema. There seems to have 2 sets of output stages. The ones with L2 maybe its the output to the speaker. But the ones with L1 is attached to CT of the transformer?

22nd July 2004, 04:36 AM	#6
X.G. diyAudio Member Join Date: Sep 2003 Location: GuangDong China	I have read the two articles of the link,including http://www.diyzone.net/sections.php?...icle&artid=129 I think the project just build an amp of Leach amp units + SE-A1 topology,not clone of SE-A1. SE-A1 topology: Is the topology of SE-A1 similar to/same as below circuit?any comment? http://www.ne.jp/asahi/evo/amp/2sk1380/report.htm

23rd July 2004, 01:04 AM	#8
X.G. diyAudio Member Join Date: Sep 2003 Location: GuangDong China	Steven, Thanks for your affirmative reply.

27th October 2004, 01:37 AM	#10
lumanauw diyAudio Moderator Emeritus Join Date: Oct 2002 Location: Bandung	Hi, Technics1, Would you explain how the amp work? It has 2 set of front end, 2 set of final stage, (one is from +/-5V, other set is from +/-100V), and one final stage is modulating 0V? Where the speakers are put?