Parallel PP ECL86

amirmk · 18th August 2005, 12:46 PM

I've been looking at a SE ECL86 scheme, in which the triode is driving the pentode. Do you know about a push pull, or parallel push pull scheme for that tube?
thanks.

Yvesm · 18th August 2005, 01:45 PM

Heres is mine !

http://www.dissident-audio.com/PP_ECL86/Page.html

Yves.

amirmk · 18th August 2005, 03:01 PM

Thank you, how good and how powerful is it?

Yvesm · 18th August 2005, 04:25 PM

Hi !

I can't tell you it's bad

All who have listened quoted it very good

Power is indicated on the schemo, some 8W before clipping.

There was a thread about here:
Hey Planet_10 (and others)

Yves.

ErikdeBest · 18th August 2005, 08:21 PM

Basically a ECL86 is half a ECC83 and an EL84 in the same envelop. So use any schematic with ECC83 and EL84...there must be plenty on the net. With two tubes/channel you have a nice PP amplifier.

plovati · 19th August 2005, 09:26 AM

Not properly. ECL86 works at lower voltage and has higher resistance. The driver triode compared to 12ax7 has reduced Ra at the same voltage, the output pentode is closer to EL86 than El84.

Despite these inaccurate comparison, the schematic from Yves is different to all published on the net and is simple, clever and cheap (less tube, simplified wiring..).

Yves have You also the winding and constructional data of the transformers? If You'll provide a transformer kit for this project, I book one!

18th August 2005, 12:46 PM	#1
amirmk diyAudio Member Join Date: Nov 2004 Location: Israel	Pp(p) Ecl86 I've been looking at a SE ECL86 scheme, in which the triode is driving the pentode. Do you know about a push pull, or parallel push pull scheme for that tube? thanks.

19th August 2005, 09:26 AM	#6
plovati diyAudio Member Join Date: Mar 2005 Location: near Milan	Not properly. ECL86 works at lower voltage and has higher resistance. The driver triode compared to 12ax7 has reduced Ra at the same voltage, the output pentode is closer to EL86 than El84. Despite these inaccurate comparison, the schematic from Yves is different to all published on the net and is simple, clever and cheap (less tube, simplified wiring..). Yves have You also the winding and constructional data of the transformers? If You'll provide a transformer kit for this project, I book one! __________________ Piergiorgio

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18th August 2005, 01:45 PM	#2
Yvesm diyAudio Member Join Date: Jul 2004 Location: Ardeche	Heres is mine ! http://www.dissident-audio.com/PP_ECL86/Page.html Yves.

18th August 2005, 03:01 PM	#3
amirmk diyAudio Member Join Date: Nov 2004 Location: Israel	Thank you, how good and how powerful is it?

18th August 2005, 04:25 PM	#4
Yvesm diyAudio Member Join Date: Jul 2004 Location: Ardeche	Hi ! I can't tell you it's bad All who have listened quoted it very good Power is indicated on the schemo, some 8W before clipping. There was a thread about here: Hey Planet_10 (and others) Yves.

18th August 2005, 08:21 PM	#5
ErikdeBest diyAudio Member Join Date: Mar 2003 Location: Itoculo	Basically a ECL86 is half a ECC83 and an EL84 in the same envelop. So use any schematic with ECC83 and EL84...there must be plenty on the net. With two tubes/channel you have a nice PP amplifier.

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