SE Tube Preamp circuit using 6922/6dj8 at low voltage(24volt) needed! anyone? - diyAudio
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Old 8th December 2002, 07:30 AM   #1
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Default SE Tube Preamp circuit using 6922/6dj8 at low voltage(24volt) needed! anyone?

i need a good circuit using 6922/6dj8 preferably at 24volts single ended.anyone can help?,..thanks


rgds,
tone
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Old 8th December 2002, 10:50 AM   #2
halojoy is offline halojoy  Sweden
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Default SE Tube Preamp circuit using 6922/6dj8 at low voltage(24volt) needed! anyone?

Quote:
Originally posted by tone
i need a good circuit using 6922/6dj8 preferably at 24volts single ended.anyone can help?,..thanks
rgds,
tone
I would also like some more info of preamp Tube amps using lower voltages than 100V.

I tried to get some info on that searching the web
some years ago. But the resuslt was thin.
I just got a hold of a couple of schematics.
Pity, I might have started for real with tubes
if I had got ahold of some good alternatives.

Basically I think you can use the same design as in ordinary TUBE amplifiers. Only change some resistor values.
You just try and find those tubes, that preserve some of the good quality at lower voltages.
6922/6DJ8 is such a tube.

Maybe we just have to wait for Dice45.
Might take some time.

Thanks tone for bringing this subject up.

Seems very little research have been done of this in the
Home Labs of the TUBE women.
And their TUBE men.
Maybe halo and tone will have to do a little research for the un-knowing tube society
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Old 8th December 2002, 01:14 PM   #3
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I believe this month's issue of Valve that is online at the
bottlehead.com web page has a headphone amp that runs
on 60v that you might check out.
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Old 8th December 2002, 01:20 PM   #4
halojoy is offline halojoy  Sweden
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Thumbs up I am on my way, bob of numbers

Quote:
Originally posted by bob12345678
I believe this month's issue of Valve that is online at the
bottlehead.com web page has a headphone amp that runs
on 60v that you might check out.
Thanks, bob of numbers
I am on my way to www.bottlehead.com
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Old 8th December 2002, 07:09 PM   #5
Colt45 is offline Colt45  Serbia
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ECC86 / 6GM8 maybe?

30v is the absoloute maximum plate voltage.

designed as an RF amplifier to run right off a car battery, no vibrator needed for B+.

albeit probably not too linear.
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Old 8th December 2002, 08:18 PM   #6
JoeBob is offline JoeBob  Canada
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Just out of curiosity why 24 volts? If you've already got a 24v suply and don't want to spend cash to build another I'd say stick to transistors. But if you're just scared of the higher voltages don't be, when you work with higher voltages for preamps you're working with very low currents. As with everything you've go tto be careful, but not more so than with transistors.
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Old 9th December 2002, 05:40 AM   #7
Fossil is offline Fossil  Singapore
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http://www.diyzone.net/images/buffer2.jpg
no, i dunno if this is any good.
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Old 20th February 2010, 12:11 AM   #8
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Its a hybrid, so sorta cheating... But hey, 24V???
Attached Files
File Type: zip LowVolt6DJ8.zip (181.8 KB, 436 views)
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