Look for tube buffer for inverted LM3875

[Mrpong]

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]

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]

6DJ8

 

[5150ed]

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

 

[Mrpong]

Thank you krub khun 5150ed.

 

[Luck]

Try this one please

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]

Or try this schamatics

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

 

[Shoog]

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

Shoog