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-   -   Aikido Gainclone (http://www.diyaudio.com/forums/chip-amps/123465-aikido-gainclone.html)

Franz Gysi 21st May 2008 08:11 AM

Aikido Gainclone
 
Hi Gainclone Friends

Did you have a look at John Broskies tube cad blog recently? The may 19 blog?

http://image.n0t.de/f-266a1213eb9e5f...03af347de3.png

An interesting circuit, isn't it?

The only thing I would like to avoid: the fat output cap...

And you'll find even more: some balanced hybrid gainclones, amazing!

www.tubecad.com

Franz

Nordic 21st May 2008 08:33 AM

Hey Franz, nice to see you posting again...

Yep, looks interesting, I guess there is no getting by that DC operating point other than to complicate the circuit.

I think, if anything, the 2200uf output cap is too low value for lowish impendance speakers... fine for earphones...I would shoot for 10kuF

AndrewT 21st May 2008 09:26 AM

Quote:

Originally posted by Nordic
I think, if anything, the 2200uf output cap is too low value for lowish impendance speakers... fine for earphones...I would shoot for 10kuF
agreed,
far too low for 8ohm speakers.

lineup 27th July 2008 02:35 PM

Re: Aikido Gainclone
 
Quote:

Originally posted by Franz Gysi
Hi Gainclone Friends
Did you have a look at John Broskies tube cad blog recently? The may 19 blog?
http://image.n0t.de/f-266a1213eb9e5f...03af347de3.png
An interesting circuit, isn't it?
The only thing I would like to avoid: the fat output cap...
And you'll find even more: some balanced hybrid gainclones, amazing!
www.tubecad.com Franz


Yeah.
Aikido Tube + Gainclone Chip

Tubes to fead LM3875 has been tried before.
Several times.

for example at this website:
Quote:

http://www.customanalogue.com/diytub...lone/index.htm
Tube Gainclone for DIY Buffs
This section of the website is dedicated to the original Tube Gainclone for DIY


Nordic 29th July 2008 02:36 PM

Franz actualy headed a valve buffer thread here before... It was my first valve project, and I stay forever in his debt for the encouragement and patience while I was still realy green...

http://www.diyaudio.com/forums/showt...5&pagenumber=1

Franz Gysi 29th July 2008 04:20 PM

Hello to South Africa!

No, I was not as patient as you write, but I tried to convince you to use a tube as buffer :D

The pictures in the old thread are gone. It was this little stereo amp (side by side with a 6C33C tube):

http://image.n0t.de/f-5f4d977234d80c...d9b02299cd.jpg

Together with the PSU:

http://image.n0t.de/f-3605e2cf87c9fe...ba082ff1a3.jpg

Regards
Franz

Nordic 29th July 2008 05:30 PM

Good times old Franzy :D

To the uninnitiated, there are 2 LM3875 chips inside that little box...

Nuuk 29th July 2008 06:18 PM

Ah! The nostalgia. It would be good to see some new and original GC case designs again! ;)

lineup 29th July 2008 07:08 PM

Quote:

Originally posted by Nordic
Good times old Franzy
To the uninnitiated, there are 2 LM3875 chips inside that little box...

Nice amplifier set, Franz.
Bet it sounds just wonderful .. with those E88CC :cool:

fredex 30th July 2008 03:41 AM

Hi Franz Gysi, I like the look of your amp. Nicely proportioned with the honesty of the raw materials.
Cheers


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