Look for tube buffer for inverted LM3875

Mrpong · 18th July 2006, 06:31 AM

I'm looking for a schematic used as tube buffer (6DJ8 or 12AU7)input for my inverted LM3875.

And yes..I did searched the chipamp section and found bunch of related threads. Thank you !!

Nuuk · 18th July 2006, 09:54 PM

1 Google for a pre-amp design using one of those valves.

2 Build a basic GC.

3 Decide on how much gain you need in total and then how much you have in the pre section.

4 Adjust the gain in the GC.

5150ed · 20th July 2006, 04:21 PM

6DJ8

5150ed · 21st July 2006, 09:43 AM

http://rexdiy.itpart.net/smf/index.php?topic=1973.15

Mrpong · 24th July 2006, 08:09 AM

Thank you krub khun 5150ed.

Luck · 26th July 2006, 06:52 AM

6DJ8 OR 6922 OR ECC88 can work so nice in a very low voltage such 60V .....the buffer is very easy to make as the pictures..

Luck · 26th July 2006, 06:52 AM

I had made an sample as in the schamatics, i used 58V....
the resistors i changed to 270_ohm and 3.3k .......

Shoog · 26th July 2006, 08:18 AM

Try this.
There is a better version that operates at +/-85V.

Shoog

18th July 2006, 06:31 AM	#1
Mrpong diyAudio Member Join Date: Aug 2004 Location: Bangkok	Look for tube buffer for inverted LM3875 I'm looking for a schematic used as tube buffer (6DJ8 or 12AU7)input for my inverted LM3875. And yes..I did searched the chipamp section and found bunch of related threads. Thank you !!

18th July 2006, 09:54 PM	#2
Nuuk diyAudio Member Join Date: Feb 2003 Location: Somerset, SW England	1 Google for a pre-amp design using one of those valves. 2 Build a basic GC. 3 Decide on how much gain you need in total and then how much you have in the pre section. 4 Adjust the gain in the GC. __________________ The truth need not be veiled, for it veils itself from the eyes of the ignorant.

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21st July 2006, 09:43 AM	#4
5150ed diyAudio Member Join Date: Jul 2005 Location: BKK	http://rexdiy.itpart.net/smf/index.php?topic=1973.15

24th July 2006, 08:09 AM	#5
Mrpong diyAudio Member Join Date: Aug 2004 Location: Bangkok	Thank you krub khun 5150ed.

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