6SN7 6N8S preamp suggestions

[merlin el mago]

@Ian, without your support I can't do it and enjoy it

@Jay, compared vs another mu-follower with ECC81, same PSU, same regs & same system

 

[Gost22]

good tube buffer with 6n8s

Please suggest some good tube buffer with this Russian 6n8s.
thank you!

 

[David Lam]

6SN7 6N8S schematic preamp suggestions

An externally hosted image should be here but it was not working when we last tested it.

Ideas and suggestions will welcome.

Hello,
I am a new member, i would like to say hello to everyone.
This is my first post here.
I got an 6L6 SE DIY amplifier (analogemetric kit).
Now I want to try DIY an preamp follow upon schematic but with 12SN7 - G.E.
Could anybody please let me know does it become a good pair?

 

[David Lam]

I am waiting for all yours suggestions
Thank very much

 

[artosalo]

The circuit you posted is fully OK, but it has some 20 dB gain.
Is that a little too much ?
Is the sensitivity of your 6L6 SE sufficient without pre-amp ?

 

[David Lam]

Here is the schematic of my 6L6SE amplifier.
I am not sure how much sensity of the amp.
In he manual instruction:
Voltage gain: 32dB for open loop gain and 23 dB for close loop gain

 

[artosalo]

Now when you are using your 6L6 SE without pre-amp, do you feel that you need more gain ?

 

[David Lam]

Because this is a power amp, but i added a VR 100k at input line to use as an intergrate amp.
Now i start with power trans first, secondary are:
2230V-0-230V/50mA (x1)
0-5.2V/2.5A (x1)
0-13V/1A (x1)
Is that enough?

 

[hpeter]

Here is the schematic of my 6L6SE amplifier.
I am not sure how much sensity of the amp.
In he manual instruction:
Voltage gain: 32dB for open loop gain and 23 dB for close loop gain

... and poor thd profile you taking signal from anode..
that´s why i use mosfet gyrator