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Old 8th October 2012, 09:31 AM   #1
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Default Best Drive for EL34

Hi

I have Single ended Amp (DIY) with two El34, and drive them with ECC81.
one Section for each el34 and plate choke instead of resistor.
about 200 volt on Anode with 4mA.

what kind of topology (SRPP , Cascode or Anode follower ) is best for Drive El34?
thanks
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Old 8th October 2012, 10:22 AM   #2
DF96 is offline DF96  England
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Ordinary grounded-cathode can drive an EL34. For low distortion try an ECC83 with a CCS as anode load.
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Old 9th October 2012, 05:30 AM   #3
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thank

what is ypur idea about my circuits? ecc81 with plate chock?
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Old 9th October 2012, 09:43 AM   #4
DF96 is offline DF96  England
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I have never used a plate choke. I would not use an ECC81 as an SE driver as it is less linear than ECC83. OK as a phase splitter, as then you get some cancellation, or for small signals.
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Old 9th October 2012, 11:08 AM   #5
death is offline death  Iran
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Hi, and glad to see someone from my country , once i have made an el34 push pull once and tried a lot of tubes for voltage amp or driver and got the best result with ecc82 with no feedback , because of its lower gain than ecc83. i hope than this is useful for your amp.

Last edited by death; 9th October 2012 at 11:11 AM.
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Old 9th October 2012, 06:02 PM   #6
hooman is offline hooman  Iran
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Quote:
Originally Posted by DF96 View Post
I have never used a plate choke. I would not use an ECC81 as an SE driver as it is less linear than ECC83. OK as a phase splitter, as then you get some cancellation, or for small signals.
what is your ecc83 brand?
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Old 9th October 2012, 06:06 PM   #7
DF96 is offline DF96  England
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I don't have an SE amp. My P-P amp uses ECC83 as a LTP phase splitter. I think it uses Brimar or Mullard - can't remember. Brand is, of course, meaningless - it is manufacture which counts and even that does not mean as much as some people think.
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Old 9th October 2012, 09:46 PM   #8
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Check out Tubelab Simple SE
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Old 9th October 2012, 09:51 PM   #9
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Here is the best drive for EL34: Hybrid Partial Feedback SE Amplifier
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Old 10th October 2012, 03:34 AM   #10
hooman is offline hooman  Iran
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Quote:
Originally Posted by CSlee View Post
Check out Tubelab Simple SE
yes and find :I settled on the 12AT7 - ECC81. This tube works almost as well as the 5842 and is available world wide for a reasonable cost.(Tubelab Home)
12at7 works well in se amps and people cant find mullard or telefunken ecc83 easily but more chance for best product ecc81.hifi tubes are different to radio tubes .Different Tube Brands ..... different sound and different price.
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