Original ECL86 "Baby Huey" thread - Page 2

jkeny · 25th August 2008, 02:01 AM

Oh, BTW I found the original Baby Huey thread in my references: http://www.diyaudio.com/forums/showt...739#post552739

gingertube · 25th August 2008, 02:05 AM

Thanks for that, I had lost that link myself.
Note Yvesm is using B+ of around 250V so Raa=8K is more appropriate than the 10K Raa I recommended above (for when you use B+ of 300V).
Cheers,
Ian

Soonerorlater · 22nd November 2009, 10:15 PM

Hi Gingertube,
In post 6 you mention using 1609's to build a Babey Huey. Did you ever get around to it. I ask because I'm thinking of using my 1609's to build either an ECL86 or EL84 version but which one. My 0-250v trannie is going to give out a high(ish) B+. The only valve stuff I've built so far (that's worked) has been the K502 and am now removing the mods for this project.

Many thanks for your great Babey Huey thread

Bill Massey

gingertube · 23rd November 2009, 12:07 AM

Bill,
250V secondary on the power tranny will get you around +300V to +320V rail.
You loose about 12V for the output tube bias which subtracts from that rail voltage (for the CCS biased versions). Either of the EL84 or ECL86 versions will be OK with 1609 Output Trannies at these voltage levels. Its at the top of what I would recommend for ECL86.
So really its your choice as to which you go for.
Cheers,
Ian

Soonerorlater · 23rd November 2009, 07:35 PM

Thanks Ian for the OK on the 1609's

I think I'll try and build the EL84 with ccs first.I have read your baby huey thread avidly
and think any future questions I might have will have been answered there already.
Brgds
Bill

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25th August 2008, 02:01 AM	#11
jkeny Banned Join Date: Feb 2007 Location: Dublin	Oh, BTW I found the original Baby Huey thread in my references: http://www.diyaudio.com/forums/showt...739#post552739

25th August 2008, 02:05 AM	#12
gingertube diyAudio Member Join Date: Oct 2004 Location: Adelaide South Oz	Thanks for that, I had lost that link myself. Note Yvesm is using B+ of around 250V so Raa=8K is more appropriate than the 10K Raa I recommended above (for when you use B+ of 300V). Cheers, Ian

22nd November 2009, 10:15 PM	#13
Soonerorlater diyAudio Member Join Date: Jul 2008 Location: Belfast	Hi Gingertube, In post 6 you mention using 1609's to build a Babey Huey. Did you ever get around to it. I ask because I'm thinking of using my 1609's to build either an ECL86 or EL84 version but which one. My 0-250v trannie is going to give out a high(ish) B+. The only valve stuff I've built so far (that's worked) has been the K502 and am now removing the mods for this project. Many thanks for your great Babey Huey thread Bill Massey

23rd November 2009, 12:07 AM	#14
gingertube diyAudio Member Join Date: Oct 2004 Location: Adelaide South Oz	Bill, 250V secondary on the power tranny will get you around +300V to +320V rail. You loose about 12V for the output tube bias which subtracts from that rail voltage (for the CCS biased versions). Either of the EL84 or ECL86 versions will be OK with 1609 Output Trannies at these voltage levels. Its at the top of what I would recommend for ECL86. So really its your choice as to which you go for. Cheers, Ian

23rd November 2009, 07:35 PM	#15
Soonerorlater diyAudio Member Join Date: Jul 2008 Location: Belfast	Thanks Ian for the OK on the 1609's I think I'll try and build the EL84 with ccs first.I have read your baby huey thread avidly and think any future questions I might have will have been answered there already. Brgds Bill