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
Did you have a look at John Broskies tube cad blog recently? The may 19 blog?
An externally hosted image should be here but it was not working when we last tested it.
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
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
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
agreed,Nordic said:I think, if anything, the 2200uf output cap is too low value for lowish impendance speakers... fine for earphones...I would shoot for 10kuF
far too low for 8ohm speakers.
Franz Gysi said:Hi Gainclone Friends
Did you have a look at John Broskies tube cad blog recently? The may 19 blog?
An externally hosted image should be here but it was not working when we last tested it.
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:
http://www.customanalogue.com/diytubegainclone/index.htm
Tube Gainclone for DIY Buffs
This section of the website is dedicated to the original Tube Gainclone for DIY
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/showthread.php?s=&threadid=48118&perpage=25&pagenumber=1
http://www.diyaudio.com/forums/showthread.php?s=&threadid=48118&perpage=25&pagenumber=1
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
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):
An externally hosted image should be here but it was not working when we last tested it.
Together with the PSU:
An externally hosted image should be here but it was not working when we last tested it.
Regards
Franz
Nordic said: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
Internal pics? Of course...
The boards where made by digi01 and me. Some errors on it
Just to avoid confusion in this thread: this is NOT an Aikido Gainclone. It is a tube buffered inverting t-net gainclone.
Franz
An externally hosted image should be here but it was not working when we last tested it.
The boards where made by digi01 and me. Some errors on it
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Just to avoid confusion in this thread: this is NOT an Aikido Gainclone. It is a tube buffered inverting t-net gainclone.
Franz
Yes, you can!
If fact if you study one of his first images you see one E88CC tube used .......
Image:
http://image.n0t.de/f-3605e2cf87c9fed65d87aaba082ff1a3.jpg
Which is almost same tube, not really 100%, but close:
6DJ8 = E88CC = Sovtek 6922
If fact if you study one of his first images you see one E88CC tube used .......
Image:
http://image.n0t.de/f-3605e2cf87c9fed65d87aaba082ff1a3.jpg
Which is almost same tube, not really 100%, but close:
6DJ8 = E88CC = Sovtek 6922
I mistyped
E188CC tubes are the special matched section, low noise and microphonics version of the E88CC/6922.
This tube is also known as 7308.
Other similar triodes (to ECC88) are PCC88, CCa and CV2492..
And of course E288CC / 8223, are absolute top sounding special quality E188CC / 7308. They are not exactly the same as the E88CC / 6922. They work for example at a little more heater current (0.475A against 0.3A). Also they have different amplification and plate impedance, but this is not problem in common E88CC circuits.
And then we have the russian 6H1pi and 6H23pi
E188CC tubes are the special matched section, low noise and microphonics version of the E88CC/6922.
This tube is also known as 7308.
Other similar triodes (to ECC88) are PCC88, CCa and CV2492..
And of course E288CC / 8223, are absolute top sounding special quality E188CC / 7308. They are not exactly the same as the E88CC / 6922. They work for example at a little more heater current (0.475A against 0.3A). Also they have different amplification and plate impedance, but this is not problem in common E88CC circuits.
And then we have the russian 6H1pi and 6H23pi
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