Aikido Gainclone

Franz Gysi · 21st May 2008, 08:11 AM

Hi Gainclone Friends

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

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

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?

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...

Projects for next hollidays (the world smallest VBITNGC??)

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

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

Together with the PSU:

Regards
Franz

Nordic · 29th July 2008, 05:30 PM

Good times old Franzy

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

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

21st May 2008, 08:11 AM	#1
Franz Gysi diyAudio Member Join Date: Oct 2007	Aikido Gainclone Hi Gainclone Friends Did you have a look at John Broskies tube cad blog recently? The may 19 blog? 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

29th July 2008, 06:18 PM	#8
Nuuk diyAudio Member Join Date: Feb 2003 Location: Somerset, SW England	Ah! The nostalgia. It would be good to see some new and original GC case designs again! __________________ The truth need not be veiled, for it veils itself from the eyes of the ignorant.

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21st May 2008, 08:33 AM	#2
Nordic diyAudio Member Join Date: Sep 2005	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

29th July 2008, 02:36 PM	#5
Nordic diyAudio Member Join Date: Sep 2005	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... Projects for next hollidays (the world smallest VBITNGC??)

29th July 2008, 04:20 PM	#6
Franz Gysi diyAudio Member Join Date: Oct 2007	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 The pictures in the old thread are gone. It was this little stereo amp (side by side with a 6C33C tube): Together with the PSU: Regards Franz

29th July 2008, 05:30 PM	#7
Nordic diyAudio Member Join Date: Sep 2005	Good times old Franzy To the uninnitiated, there are 2 LM3875 chips inside that little box...

30th July 2008, 03:41 AM	#10
fredex diyAudio Member Join Date: Jul 2005 Location: New Zealand	Hi Franz Gysi, I like the look of your amp. Nicely proportioned with the honesty of the raw materials. Cheers

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