New preamp project is online

Joel · 30th October 2005, 10:59 AM

I finished my latest project, a transformer-coupled 6DJ8 preamp, and put the pictures and schematic on my website.
I'm really enjoying it so I figured someone may find it interesting.

Joel

http://www.joeltunnah.com

J Epstein · 30th October 2005, 09:52 PM

Joel - I see from your profile you are in Brooklyn - whereabouts?

I'm in Carroll Gardens, maybe we can do some tube Car-rolling one rainy Sunday . . . .

-j

Zen Mod · 30th October 2005, 10:35 PM

I don't know (and I'm lazy to look) exact specs for that Lundahl-but in my tests I have better results with one whole ECC88 envelope per channel (both sections in parallel,with separate grid stoppers);I don't remember exact working poin,but I remember that I like it pretty hot........

and-yes with OA2 in stab. (one OA per channel) .

you can see my WOT if you click bellow on www mark

hehe-now you know what "signal energy preservation" means......

Joel · 31st October 2005, 12:47 AM

The Lundahl is rated at 10mA, but can be run at 12mA or slightly higher with lower output levels. I'm running each half of the 6DJ8 at 12mA in this circuit.

JEpstein, I'm in Park Slope. 16th St and 7th Ave.

Joel

30th October 2005, 10:59 AM	#1
Joel diyAudio Member Join Date: Oct 2002 Location: Brooklyn, NY	New preamp project is online I finished my latest project, a transformer-coupled 6DJ8 preamp, and put the pictures and schematic on my website. I'm really enjoying it so I figured someone may find it interesting. Joel http://www.joeltunnah.com

30th October 2005, 10:35 PM	#3
Zen Mod diyAudio Member Join Date: Jan 2003 Location: ancient Batsch , behind Iron Curtain	I don't know (and I'm lazy to look) exact specs for that Lundahl-but in my tests I have better results with one whole ECC88 envelope per channel (both sections in parallel,with separate grid stoppers);I don't remember exact working poin,but I remember that I like it pretty hot........ and-yes with OA2 in stab. (one OA per channel) . you can see my WOT if you click bellow on www mark hehe-now you know what "signal energy preservation" means...... __________________ my Papa is smarter than your Nelson ! tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; Mighty ZM's Bloggg;I'm dumb

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30th October 2005, 09:52 PM	#2
J Epstein diyAudio Member Join Date: Feb 2002	Joel - I see from your profile you are in Brooklyn - whereabouts? I'm in Carroll Gardens, maybe we can do some tube Car-rolling one rainy Sunday . . . . -j

31st October 2005, 12:47 AM	#4
Joel diyAudio Member Join Date: Oct 2002 Location: Brooklyn, NY	The Lundahl is rated at 10mA, but can be run at 12mA or slightly higher with lower output levels. I'm running each half of the 6DJ8 at 12mA in this circuit. JEpstein, I'm in Park Slope. 16th St and 7th Ave. Joel