6SL7GT pre-amp

feniks · 14th September 2007, 09:39 PM

I need schema for preamp with 6sl7gt to drive el84.Thanks to all.

Miles Prower · 16th September 2007, 03:19 AM

Quote:

Originally posted by feniks
I need schema for preamp with 6sl7gt to drive el84.Thanks to all.

That's asking a lot of a 6SL7. The 6SL7 is a high gain, low current, low g(m) type that doesn't drive power finals very well. Best to add a driver of some sort there.

Geek · 16th September 2007, 03:41 AM

6SL7 can drive EL84 OK if the EL84 is running pentode mode and class-A. But don't ask for super linearity without a NFB loop.

dsavitsk · 16th September 2007, 04:34 AM

Or you could use a step down transformer.

feniks · 16th September 2007, 07:48 AM

ok.Thanks for help.

Colt45 · 16th September 2007, 08:52 AM

6SL7 will drive a SE EL84 piece of cake. EL84 is super easy to drive.

not sure why you'd need that much gain though.

feniks · 16th September 2007, 12:10 PM

Just for experiment,nothing special.

Dave Cigna · 16th September 2007, 12:45 PM

a preamp?

What do you plan to connect to the input and output?

kevinkr · 16th September 2007, 10:35 PM

6SL7 in srpp will drive a triode or pentode/UL connected EL84 or even an EL34 quite effectively. Take a look at my old 45 SE design for an example. (This amplifier was recently gifted back to me after an absence of several years when its new owner decided he needed to downsize. It still sounds good despite the limitations mentioned in the article.)

14th September 2007, 09:39 PM	#1
feniks diyAudio Member Join Date: Jun 2007 Location: Nis	6sl7gt preamp I need schema for preamp with 6sl7gt to drive el84.Thanks to all.

16th September 2007, 04:34 AM	#4
dsavitsk diyAudio Member Join Date: Jan 2005 Location: Chicago	Or you could use a step down transformer. __________________ http://www.ecpaudio.com

16th September 2007, 12:45 PM	#8
Dave Cigna diyAudio Member Join Date: Oct 2003 Location: Finger Lakes, NY	a preamp? What do you plan to connect to the input and output? __________________ January 20, 2009: Bush's last day

16th September 2007, 10:35 PM	#9
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts Blog Entries: 6	6SL7 in srpp will drive a triode or pentode/UL connected EL84 or even an EL34 quite effectively. Take a look at my old 45 SE design for an example. (This amplifier was recently gifted back to me after an absence of several years when its new owner decided he needed to downsize. It still sounds good despite the limitations mentioned in the article.) __________________ www.kta-hifi.net

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16th September 2007, 03:41 AM	#3
Geek diyAudio Member Join Date: Sep 2004	6SL7 can drive EL84 OK if the EL84 is running pentode mode and class-A. But don't ask for super linearity without a NFB loop.

16th September 2007, 07:48 AM	#5
feniks diyAudio Member Join Date: Jun 2007 Location: Nis	ok.Thanks for help.

16th September 2007, 08:52 AM	#6
Colt45 diyAudio Member Join Date: Feb 2002 Location: Canada	6SL7 will drive a SE EL84 piece of cake. EL84 is super easy to drive. not sure why you'd need that much gain though.

16th September 2007, 12:10 PM	#7
feniks diyAudio Member Join Date: Jun 2007 Location: Nis	Just for experiment,nothing special.

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