829 or GU-29 audio amplifier schematics?

[soundbrigade]

About odd looking (HF-tubes), I've got a schematic of a SE-amp using a (Russian) GU72. (Could it be an 872???)
Have you seen that one?

[AcidEye]

I've googled for the GU-72, looks like a very powerfull HF tube. I haven't seen audio schematic for this tube, if you have some please share them with us :-)

[soundbrigade]

The only amp I have fond (so far) is this one SEGU72
But I am still oogling and googling.
The 6C2C are equivalent to 6J5GT.

[alexg]

Originally posted by adalin
I just finnished a new chassie for my amp and hopefully all the pieces will fit in it

I use the PC connector style for my anodepins, it works pretty good

I have a bunch of 832 and would love if you can give me a schematic of the circuit you used for your amp.

Thanks.

Alex

[AcidEye]

Alex,

A proven design using the 832 can be found on:

http://www.audiohobbyist.com/projects/832.htm

I am still waiting for the output transformer to arrive, this 832 amplifier is on top of my project list :-)

[soundbrigade]

I dug up these from my AUDIO-folder:

SE: 6N9S_829
6SJ7-829SE
832PP
Coldwar 829PP
12SN7-829SE
PSU to above
Simple 832PP
6N9P-829PP

[Tubes4e4]

For those designs shown using 3E29 / 829B / QQE04-60 / YL1060 strapped as triode in this thread, some of them use real strange operation points. Hence I would suggest to double check with the traced curves, which are available here:

3E29/829B/QQE04-60/YL1060 strapped as triode

Regards,

Tom Schlangen

[ilimzn]

Originally posted by Tubes4e4
For those designs shown using 3E29 / 829B / QQE04-60 / YL1060 strapped as triode in this thread, some of them use real strange operation points. Hence I would suggest to double check with the traced curves, which are available here:

3E29/829B/QQE04-60/YL1060 strapped as triode

Regards,

Tom Schlangen

Tom,
I wonder if you ever saw a dissipation disparity problem when tracing the curves - wildly different currents in the two sections, resulting in overheating of one section? i seem to remember reading something about it here a long while ago.

Also, i will take this oportunity to thank you for the traced curves for EL509 with low Vg2 and G2 driven. Would you happen to have real traced triode curves as well? I am also looking forward to finding triode curves for the EL/PL508 - perhaps wishful tinking, but you seem to be the person to ask when triode curves are needed

[alexg]

Originally posted by AcidEye
Alex,

A proven design using the 832 can be found on:

http://www.audiohobbyist.com/projects/832.htm

I am still waiting for the output transformer to arrive, this 832 amplifier is on top of my project list :-)

I saw that circuit, I might do that then. Thanks.

Has anybody used the 829/832 for SE?

Thanks

[wa4swj]

Hi Fellows,

Picture of my 832 amp is below. I used the Audio Hobbyist design and it works quite well. I have not hooked it up to my distortion analyzer yet but it sounds exceptionally good. Very open and plenty of punch. I used some slip on connectors from a terminal block for the plate connections - from a Phoenix terminal block.

Regards,