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Old 31st May 2009, 08:39 PM   #21
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By all means!!
My respect to the other members, with its valuable contribution!
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Old 25th April 2016, 10:45 AM   #22
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Originally Posted by widowmaker View Post
The project was "slightly" modified
Here is the last version:
I am planning to build SE tube amp with 6S4S russian tubes.
Unfortunately the link you sent, modified scheme I can't access.
Can you send me the modified scheme for SE Tube amp with 6S4S tubes?
Thanks in advance.
Regards Vojin
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Old 25th April 2016, 03:43 PM   #23
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You should start a new thread, he posted in 2006!
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Old 25th April 2016, 05:10 PM   #24
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Default 6S4S Tube Amp scheme

Sorry, mea culpa!
I didn't know the the rules for old/new threads.


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Old 25th April 2016, 05:21 PM   #25
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It's not a rule, just a suggestion, or you can try to contact widowmaker via PM.
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Old 25th April 2016, 06:11 PM   #26
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Well, my idea was to address the question directly
to the person. Obviously I made it wrong way.
Thank you, anyway.
I'll try again.
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Old 25th April 2016, 06:28 PM   #27
Bigun is offline Bigun  Canada
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This is a good thread, perfectly OK to dig up old threads, I do it all the time

so, 6C4C. It's pretty much the same as 2A3. I think you can choose one of the many different designs for 2A3. What will need to be different is the filament heating supply. The heater voltage is 6.3V and likely at this voltage you will experience hum in the speaker unless you use DC instead of AC heating. I know some people were happy with AC heating but mostly I see people use DC with this tube.

I have a few of these triodes and am considering using them in SE too.
"The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed." Robert M Pirsig.
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Old 4th May 2016, 10:38 AM   #28
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Here is the updated schematic of that amp.
Please, adjust cathode resistor of the output
stage in such a way that you have about 66-68mA
anode current. And don't worry about higher power
dissipation of output triode, I have several amplifiers
with more than 20W dissipation and they still work.
(about 7-8 years without any changing of bulbs)
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High Tension Wires Department
Daniel Petrov also known as widowmaker

Last edited by widowmaker; 4th May 2016 at 10:43 AM.
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Old 4th May 2016, 10:48 AM   #29
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I am currently building a SET using 6C4C tubes and Rod coleman filament regulators. It is so quiet i also use it as a headphone amp with HD800's

Last edited by mcandmar; 4th May 2016 at 10:51 AM.
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Old 4th May 2016, 10:53 AM   #30
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I agree, that these interstage tantalum lytics are good, they do not increase impedance at high frequencies as ordinary lytics. But, is it really good idea to connect them in chain, soundwise and reliabilitywise?
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