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jkeny 24th August 2008 09:27 PM

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?

gingertube 25th August 2008 12:43 AM

Look at Yvesm's web pages:
Here is my take on Yves circuit

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.


DrewP 25th August 2008 12:50 AM

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



gingertube 25th August 2008 12:53 AM

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.

PeteMcK 25th August 2008 12:56 AM

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.

gingertube 25th August 2008 01:03 AM

Sorry guys - just updated my profile, you should be able to PM me now.

Push Pull Operating points for ECL86 on this data sheet:

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.


jkeny 25th August 2008 01:24 AM

Hi Ian,
Thanks for the reply - I'm trying out Blumlein's Garter Biasing on this amp :

jkeny 25th August 2008 01:50 AM

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?

gingertube 25th August 2008 01:54 AM

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.

jkeny 25th August 2008 01:58 AM

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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