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Old 3rd December 2003, 06:15 AM   #1
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Default :: Audiotek 69 - [Technics SE-A1?] ::

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?

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ragil.hastomo
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Old 3rd December 2003, 06:16 AM   #2
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Old 3rd December 2003, 06:17 AM   #3
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Old 21st July 2004, 02:03 PM   #4
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i'm baaaackkkkkk .. knock .. knock .. knock .. anybody there?


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Old 22nd July 2004, 12:52 AM   #5
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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?
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Old 22nd July 2004, 04:36 AM   #6
X.G. is offline X.G.  China
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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:
Click the image to open in full size.

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

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

Click the image to open in full size.
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Old 22nd July 2004, 06:53 PM   #7
Steven is offline Steven  Netherlands
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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
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Old 23rd July 2004, 01:04 AM   #8
X.G. is offline X.G.  China
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Steven,

Thanks for your affirmative reply.
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Old 26th October 2004, 09:36 PM   #9
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Default Technics SE-A1

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

Click the image to open in full size.


Greetings

Dieter
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Old 27th October 2004, 01:37 AM   #10
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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?
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