Best Drive for EL34

navidstat · 8th October 2012, 09:31 AM

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

DF96 · 8th October 2012, 10:22 AM

Ordinary grounded-cathode can drive an EL34. For low distortion try an ECC83 with a CCS as anode load.

navidstat · 9th October 2012, 05:30 AM

thank

what is ypur idea about my circuits? ecc81 with plate chock?

DF96 · 9th October 2012, 09:43 AM

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.

death · 11:11 AM

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.

hooman · 9th October 2012, 06:02 PM

Quote:

Originally Posted by DF96

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?

DF96 · 9th October 2012, 06:06 PM

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.

CSlee · 9th October 2012, 09:46 PM

Check out Tubelab Simple SE

Wavebourn · 9th October 2012, 09:51 PM

Here is the best drive for EL34: Hybrid Partial Feedback SE Amplifier

hooman · 10th October 2012, 03:34 AM

Quote:

Originally Posted by CSlee

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.

8th October 2012, 09:31 AM	#1
navidstat diyAudio Member Join Date: Apr 2010 Location: Iran	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

9th October 2012, 11:08 AM	#5
death diyAudio Member Join Date: May 2011 Location: tehran	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.

9th October 2012, 09:46 PM	#8
CSlee Clueless diyAudio Member Join Date: Mar 2009 Location: London	Check out Tubelab Simple SE __________________ Broke solderer with delusions of grandeur

9th October 2012, 09:51 PM	#9
Wavebourn diyAudio Member Join Date: Sep 2006 Location: Pleasant Hill, CA	Here is the best drive for EL34: Hybrid Partial Feedback SE Amplifier __________________ If I disappear suddenly, that means I finally created a time machine and pushed wrong button that brought me to Stalin's Russia. In any experiment any result is the result. Even if it is negative.

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8th October 2012, 10:22 AM	#2
DF96 diyAudio Member Join Date: May 2007	Ordinary grounded-cathode can drive an EL34. For low distortion try an ECC83 with a CCS as anode load.

9th October 2012, 05:30 AM	#3
navidstat diyAudio Member Join Date: Apr 2010 Location: Iran	thank what is ypur idea about my circuits? ecc81 with plate chock?

9th October 2012, 09:43 AM	#4
DF96 diyAudio Member Join Date: May 2007	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.

9th October 2012, 06:06 PM	#7
DF96 diyAudio Member Join Date: May 2007	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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