6C33C-B. PP or SE ? - Page 4

Predator864 · 29th January 2009, 07:50 AM

Still no answer...

inertial · 29th January 2009, 09:22 AM

Very strange........
Keep in mind he is very very busy.

Cheers,
Paolo

Predator864 · 31st January 2009, 03:24 PM

Found this transformers :

http://cgi.ebay.com/600OHM-SE-AUDIO-...ayphotohosting

On paper they look OK.

inertial · 31st January 2009, 04:01 PM

Predator,
I'm not sure to understand your choice because BA design is IMO a sort of parafeed;
it employ a transformer without air-gap

Cheers,
Paolo

Predator864 · 31st January 2009, 04:09 PM

Call me Bob.

Oh. Thanks again (and again) Paolo for the tip.

Now all I have to do, is to wait for Mr. BA to reply.

inertial · 31st January 2009, 04:17 PM

Hey Bob

,
Excuse my question: are you sure to have the instruments to build yourself that monster?

Because It seems to me it is not the typical basic SE;
It is IMO not an easy task

But I am really newbie on tubes, so my point is just impression, of course!

Hey, what type of speakers do you have to drive with it?
Big room or little?

Cheers,
Paolo

Predator864 · 31st January 2009, 04:34 PM

I have many speakers

from low to high efficiency.
Time is my ally, I will not rush this project.

About the instruments, I`m looking forward to purchase some measurements tools.

I like challenging projects. More important is the info you gather about them. The rest is simple.

Jeb-D. · 31st January 2009, 04:50 PM

Quote:

http://cgi.ebay.com/600OHM-SE-AUDIO... ohosting On paper they look OK.

I've used those. They do well, but only up to about 10W of output power.

Edcor has a 600ohm CXSE transformer (http://www.edcorusa.com). I am using a pair now in a 6c33c SE. They are considerably beefier and will only cost you $20 more per transformer. Even though they are rated at half the power of the eastern audio transformers, in real life they will handle about twice. I guess Edcor is rated in US watts and the EA is Chinese watts.

Edcor doesn't list the 600ohm transformers online. You have to call or possibly e-mail to order them.

Their current 600ohm design has %50 taps. I had them add those for a local feedback experiment. You can have them remove the taps, since you won't be using them.

NJE807 · 2nd March 2009, 05:25 PM

I have been mulling over Dmitry Nizh's inductor coupled design for a while now, and even have the ECC99's and 6C33C's at the ready! So I will have to give those OPT a look myself. I was thinking of using the UBT-1's or something similiar. Most of the SE circuits floating about for this tube insist on some exotic iron, which is what appeals to me with this design, as well as the linear driver tube, and the operating range of the output tube. Has anyone else used this design?

felixx · 2nd March 2009, 06:15 PM

If you want a good SE,go with these design:
http://www.metaleater.narod.ru/6c33c.gif
If you want a very good SE you should try Romy design:

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29th January 2009, 07:50 AM	#31
Predator864 diyAudio Member Join Date: Mar 2008	Still no answer...

29th January 2009, 09:22 AM	#32
inertial diyAudio Member Join Date: Aug 2004 Location: Italy	Very strange........ Keep in mind he is very very busy. Cheers, Paolo

31st January 2009, 03:24 PM	#33
Predator864 diyAudio Member Join Date: Mar 2008	Found this transformers : http://cgi.ebay.com/600OHM-SE-AUDIO-...ayphotohosting On paper they look OK.

31st January 2009, 04:01 PM	#34
inertial diyAudio Member Join Date: Aug 2004 Location: Italy	Predator, I'm not sure to understand your choice because BA design is IMO a sort of parafeed; it employ a transformer without air-gap Cheers, Paolo

31st January 2009, 04:09 PM	#35
Predator864 diyAudio Member Join Date: Mar 2008	Call me Bob. Oh. Thanks again (and again) Paolo for the tip. Now all I have to do, is to wait for Mr. BA to reply.

31st January 2009, 04:17 PM	#36
inertial diyAudio Member Join Date: Aug 2004 Location: Italy	Hey Bob , Excuse my question: are you sure to have the instruments to build yourself that monster? Because It seems to me it is not the typical basic SE; It is IMO not an easy task But I am really newbie on tubes, so my point is just impression, of course! Hey, what type of speakers do you have to drive with it? Big room or little? Cheers, Paolo

31st January 2009, 04:34 PM	#37
Predator864 diyAudio Member Join Date: Mar 2008	I have many speakers from low to high efficiency. Time is my ally, I will not rush this project. About the instruments, I`m looking forward to purchase some measurements tools. I like challenging projects. More important is the info you gather about them. The rest is simple.

2nd March 2009, 05:25 PM	#39
NJE807 diyAudio Member Join Date: Oct 2007	I have been mulling over Dmitry Nizh's inductor coupled design for a while now, and even have the ECC99's and 6C33C's at the ready! So I will have to give those OPT a look myself. I was thinking of using the UBT-1's or something similiar. Most of the SE circuits floating about for this tube insist on some exotic iron, which is what appeals to me with this design, as well as the linear driver tube, and the operating range of the output tube. Has anyone else used this design?