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High Power Single Ended Triode, Design
High Power Single Ended Triode, Design
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Old 29th December 2013, 02:43 AM   #1
Eddiegnz1 is offline Eddiegnz1  United States
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Default High Power Single Ended Triode, Design

What are the main design considerations if one were to try to design a Single Ended Triode tube amp delivering at least fifty watts per mono block.

** what kind of output valves (& how many)?
** must the output valves be in series? or is there another way?
** toroidal transformers or EI ?
** how much voltage from power supply transformer?
** what would be the overall valve setup?

** why is it that SET amps which deliver 50watt per channel or higher are so rare and illusive?

Kind thanks,
Eddie
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Old 29th December 2013, 03:27 AM   #2
chrish is offline chrish  Australia
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Quote:
why is it that SET amps which deliver 50watt per channel or higher are so rare and illusive?
Uhmm, if you read the books people have suggested in your previous questions threads, you would know the answer.
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Old 29th December 2013, 04:38 AM   #3
Richard Ellis is offline Richard Ellis  Argentina
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Location: Mar del Plata, a BIG seasonal getaway city, can see the Ocean from our residence.
I have on tap a single ended 813 design, courtesy of a "Willis" a source for a 813 single ended, running at 45 WPC.
Single ended towards that power level requires transmitter type tubes. The 813 power Pentode can be configured for that level.


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Last edited by Richard Ellis; 29th December 2013 at 04:41 AM.
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Old 29th December 2013, 04:38 AM   #4
PBNAUDIO is offline PBNAUDIO  United States
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Cary Audio Design - CAD 805 AE - Single Ended Triode Tube Amp

They have been making this one for 20 years plus, readily available :-)

Good Listening

Peter
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Old 29th December 2013, 07:23 AM   #5
astouffer is offline astouffer  United States
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Check this one out 6P45S amps
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Old 29th December 2013, 08:01 AM   #6
316a is offline 316a  England
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Quote:
Originally Posted by Eddiegnz1 View Post
What are the main design considerations if one were to try to design a Single Ended Triode tube amp delivering at least fifty watts per mono block.

** what kind of output valves (& how many)?
** must the output valves be in series? or is there another way?
** toroidal transformers or EI ?
** how much voltage from power supply transformer?
** what would be the overall valve setup?

** why is it that SET amps which deliver 50watt per channel or higher are so rare and illusive?

Kind thanks,
Eddie
Better off building more sensitive speakers if going the SE route IMO

316a
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Old 29th December 2013, 12:25 PM   #7
kstagger is offline kstagger  United States
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as others have already answered, "high powered" triode amplifiers are rare because they are by their very definition dangerous. They require transmitting tubes running at very high - read LETHAL - voltages. Now working with even 400 to 500Vs is not my idea of fun, but I haven't been electrocuted *knock on wood* for years and years. But even with all my amplifier building experience, I still have never tackled anything in the 800V+ range. I'll easily admit I fear that kind of voltage coursing through me.

If anyone wants to take the trouble of building a higher power SE amp, I would suggest sticking with pentodes. Something like the EL156 or any number of the "bigger" pentodes can easily make 20Ws at sane voltages.

or get a pair of Altec VoTTs or 604s and be happy with a 8W 300B design.
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Old 29th December 2013, 01:17 PM   #8
osscar is online now osscar  Latvia
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hi, you can try 6c33c SE (relatively low voltage (200-250) and high power 15W + - can be squeezed out)
downside: high temperature and complex assembly (im currently working on my first tube amp based on 6c33c)
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My DIY so far: two Leach amps, Pass AB100, Pass F5, B1 buffer, Hiraga le monstre, two LM3875, LM1875, OPA549, 6C33C SE, GU32 PP, 6p3c-e PP, Marsh headphone amp.Phono - OBH-8se, Pacific RIAA, inDiscreet Phono, Whammy headphone amp.
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