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Old 27th January 2013, 06:54 AM   #21
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Thanks! For headphones, maybe - 16-32 ohhms, You can connect parallel big resistor about 10-12 ohms.
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Old 27th January 2013, 10:10 AM   #22
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Did anyone finish their 6C33 amp?
Yes, and the results are really excellent.
6S66S are really good tubes as long as you do not attempt to reach the last watt of anode power.
Always keep the tube under 75% of its maximal anode dissipation, and it will last for years.

SE: SE 6J9P,EL183, 6S33S, 6E3P
PP: Push-pull 6S33S, 6N23P, 6JH8, 6N1P-EV, IN13
I have not written the english version yet, but the schematics are not difficult to follow.
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Old 27th January 2013, 11:10 AM   #23
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Quote:
Originally Posted by azazello View Post
Thanks! For headphones, maybe - 16-32 ohhms, You can connect parallel big resistor about 10-12 ohms.
OK, but the normal on a Headphone is a range of 32-600 Ohm and I´m most interested on 250-600 Ohm Headphones. I think it doesn´t make sense build an amp very "excessive" only for 32 Ohm headphones.

What can I do on this case? Would I add an output trafo? impedance?

Cheers.
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Old 27th January 2013, 11:13 AM   #24
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Originally Posted by Blaireau View Post
SE: SE 6J9P,EL183, 6S33S, 6E3P
PP: Push-pull 6S33S, 6N23P, 6JH8, 6N1P-EV, IN13
I have not written the english version yet, but the schematics are not difficult to follow.
Nice amps
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Old 27th January 2013, 11:51 AM   #25
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blackdod,
I know EDCOR produce output transformers for headphones, but what current range with, I don't know. Plate current in SE is less 300 ma. If You find
suitable transf., You can use it like alternative to normal transf. for 8 ohms by switching on or off.
Or make 6S33S ampl. in cathode follower mode....
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Old 27th January 2013, 01:08 PM   #26
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Originally Posted by azazello View Post
I made 2 SE 6S33S for my friends, according Russian schematic with 6E5P, I tried with E280F-Phillips and sound was better:
http://sergeev21.narod.ru/6s33s6e5p.GIF
https://picasaweb.google.com/1095707...98640803460258
https://picasaweb.google.com/1095707...84404731452706

This would be a great place to use a dn2540 or two, with 330v you can swing huge voltages at tiny amounts of distortion.

with 6e5p i found 180v/28ma/-3.5 =180v p-p @ 0.09% with just a single mosfet ccs.

lovely looking amp :-) not feel sorry for the cd player though!

enzo
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Old 27th January 2013, 01:47 PM   #27
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Thanks azazello.

Quote:
Originally Posted by azazello View Post
blackdod,
Or make 6S33S ampl. in cathode follower mode....
I prefer this alternative. I have got others tube amps with this mode (cathode follower) and I'm really satisfied. My two tube amps have double triode tube (6080/6AS7G/6N5/6N13... ) on the output.

Have got I take some consideratión for use the 6C33S with this mode?

Cheers
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Old 12th June 2013, 04:02 PM   #28
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Originally Posted by Blaireau View Post
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Did anyone finish their 6C33 amp?
Yes, and the results are really excellent.
6S33S are really good tubes as long as you do not attempt to reach the last watt of anode power.
Always keep the tube under 75% of its maximal anode dissipation, and it will last for years.

SE: SE 6J9P,EL183, 6S33S, 6E3P
PP: Push-pull 6S33S, 6N23P, 6JH8, 6N1P-EV, IN13
I have not written the english version yet, but the schematics are not difficult to follow.
__________________
http://constructions.f6fkn.com
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Old 13th June 2013, 02:55 PM   #29
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Has anyone here tried to use the 6N30P/6N30Pi as driver for the 6C33C? How would the sound compare to that of the 6E5PI? What would be the ideal swing voltage p-p to get form a 6N30P to drive the 6C33C with distortion below <1%? could it be done without feedback?
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