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-   -   Best Drive for EL34 (http://www.diyaudio.com/forums/tubes-valves/221140-best-drive-el34.html)

navidstat 8th October 2012 10:31 AM

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

DF96 8th October 2012 11:22 AM

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

navidstat 9th October 2012 06:30 AM

thank

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

DF96 9th October 2012 10:43 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 9th October 2012 12:08 PM

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 07:02 PM

Quote:

Originally Posted by DF96 (Post 3194747)
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 07:06 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.

Brouilly 9th October 2012 10:46 PM

Check out Tubelab Simple SE

Wavebourn 9th October 2012 10:51 PM

Here is the best drive for EL34: http://www.diyaudio.com/forums/tubes...ml#post2709572

hooman 10th October 2012 04:34 AM

Quote:

Originally Posted by CSlee (Post 3195622)
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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