Original ECL86 "Baby Huey" thread - diyAudio
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Old 24th August 2008, 09:27 PM   #1
jkeny is offline jkeny  Ireland
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Default Original ECL86 "Baby Huey" thread

I can't seem to do a search in the archives for this does somebody have a link to it?

Can an archive search be done?
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Old 25th August 2008, 12:43 AM   #2
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Look at Yvesm's web pages:
http://www.dissident-audio.com/PP_ECL86/Page.html
Here is my take on Yves circuit
http://www.diyaudio.com/forums/atta...tamp=1113448831

I think these are the same links I put in at post #362 on pg 15 of the BH Thread but worth a check.

I'm building another ECL86 (6GW8) version for a niece at the moment. It will be fixed biased variant, close to Yves original but using Ultralinear Mode.

Cheers,
Ian
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Old 25th August 2008, 12:50 AM   #3
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Default Off Topic Ping Gingertube

Ian, is there any way I can get in touch with you to discuss circuit stuff off board?

Cheers

Drew
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Old 25th August 2008, 12:53 AM   #4
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Drew,
Click on my underlined "moniker" on the left side of my post and my profile page will come up. On there is a link to email me direct.
Cheers,
Ian
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Old 25th August 2008, 12:56 AM   #5
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Ian,
your 2nd link doesn't work for me;
do you know off-hand the primary impedance of the OT for Yve's amp? interesting schematic.
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Impedance varies with frequency, use impedance plots of your drivers and make crossover calculations using the actual impedance of the driver at the crossover frequency
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Old 25th August 2008, 01:03 AM   #6
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Sorry guys - just updated my profile, you should be able to PM me now.

Push Pull Operating points for ECL86 on this data sheet:
http://www.mif.pg.gda.pl/homepages/f...10/e/ECL86.pdf

It says Raa = 9K1, I'm building the new amp with Hammond 1609 which is 10K Raa. Close enough. I thought they would be a little better than the Hammond 1608 (8K Raa) for this build.

Cheers,
Ian
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Old 25th August 2008, 01:24 AM   #7
jkeny is offline jkeny  Ireland
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Hi Ian,
Thanks for the reply - I'm trying out Blumlein's Garter Biasing on this amp :http://www.diyaudio.com/forums/showt...76#post1593376
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Old 25th August 2008, 01:50 AM   #8
jkeny is offline jkeny  Ireland
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I didn't think the 270R was split, I thought I just changed all 200R to 270R?

Thanks for the info on the 470K.

Have you tried this biasing method?

Will the feedback R need to be changed?
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Old 25th August 2008, 01:54 AM   #9
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jkeny,
You are obviously responding to the post I had here for about 10 minutes before deleting it since it contained BS. Just c hanging all the 200R to 270R is correct.
I have posted to your Blumlein Garter thread instead with better info.
Cheers,
Ian
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Old 25th August 2008, 01:58 AM   #10
jkeny is offline jkeny  Ireland
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Ah, yes I was confused more than usual for a moment so I posted this to the Garter thread as well just to be sure
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