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Old 21st August 2012, 05:41 AM   #931
osscar is offline osscar  Latvia
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the project is currently stalled because the enclosure parts have still not made​​ ( i ordered them long time ago-so i should replace my order i think)
so far : PSU for one channel (almost done both of them) :
Click the image to open in full size.
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Old 21st October 2012, 09:40 AM   #932
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Quote:
Originally Posted by cumbb View Post
Hello.

I suggest the same modification on the sewa as Ladislav Bunta did on the power Follower of Pavel Macura. The Bipolar Transistor. The sound will be more relaxed and fine:

Click the image to open in full size.

And my proposals:
Connect the grounds of the Q2 of the sewa.
Do not use channel separate PSUs. Never and nowhere.

The sound of the sewa in general comparision to the power follower of Macura (in my mind!):

It seems, the sewa has more „black“, more focus, he is more present and living, but he is a little bit restless, „brittle“, scruff.
The Macura seems to be more relaxed and quiet, more fine and clear, extended, but not so present and alive.

But this is only my experience!

Best regards.
C.
This diy amplifier I get for service.
Do you know the formerly URL, where to find is this circuit?
Then I will try to find it about webarchive.
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Old 24th October 2012, 01:27 PM   #933
lineup is offline lineup  Sweden
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Quote:
Originally Posted by tiefbassuebertr View Post
This diy amplifier I get for service.
Do you know the formerly URL, where to find is this circuit?
Then I will try to find it about webarchive.
The MOSFET Power Follower of Pavel Macura (PMA)
can be found here:
Mosfet Power Follower and other projects

And here below is the schematic from the original circuit.
Attached Images
File Type: gif pavel_macura_fig_1.gif (6.1 KB, 724 views)
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Old 24th October 2012, 02:43 PM   #934
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Quote:
Originally Posted by lineup View Post
The MOSFET Power Follower of Pavel Macura (PMA)
can be found here:
Mosfet Power Follower and other projects

And here below is the schematic from the original circuit.
Thank you. This link and this circuit I have. Unfortunately the schematic from post #892 isn't to find there.
But this schematic I need in high resolution (Ladislav Bunta's advanced circuit).

Last edited by tiefbassuebertr; 24th October 2012 at 02:45 PM.
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Old 31st January 2014, 11:09 PM   #935
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Hi there,
Coming to this low power solid state amp thing very late in the day, having generally used tube amps or hybrid (tube/SS) to drive Fostex 206En in BLH cabinet.
Does anyone know of any PCB's (Rev B or C) that are going spare?
Or a revised design of SEWA or alternate design for which PCB's are available?
I've tried point-to-point wiring and it's not a pretty sight, and I am not confident enough (in DIY terms) to fill in any gaps in circuit designs, i.e. I need to use a fully resolved design!

Thanks for any suggestions/links
J
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Old 3rd February 2014, 10:33 AM   #936
Tyimo is offline Tyimo  Hungary
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Hi!
I sent you a private message.

Greets:
Tyimo
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Old 3rd February 2014, 02:41 PM   #937
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Quote:
Originally Posted by tiefbassuebertr View Post
Thank you. This link and this circuit I have. Unfortunately the schematic from post #892 isn't to find there.
But this schematic I need in high resolution (Ladislav Bunta's advanced circuit).
The wanted schematic is here:
ImageShack® - Online Photo and Video Hosting
Imageshack - p83f3gb0.gif
http://www.diyaudio.com/forums/attac...amp=1216269919
go also to post 27 under
Pavel Macura's MOSFET Power Follower

Last edited by tiefbassuebertr; 3rd February 2014 at 02:56 PM.
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Old 6th May 2014, 04:22 PM   #938
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I can use this pre circuit diagram for SEWA ???.
6H2P
Click the image to open in full size.
Thank .
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Old 6th May 2014, 06:33 PM   #939
Tyimo is offline Tyimo  Hungary
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Yes.
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