Valve operating points for best sound

[vitavoxdude]

Open question regarding 6J5's.  Does anyone have a set of recommended operating points for these valves?  I have the data sheet, but nothing beats actual setups.  They are being used as part of a phono amp with ecc88's upfront and 300B's downstream.
V

[stevenvalve]

Open question regarding 6J5's.  Does anyone have a set of recommended operating points for these valves?  I have the data sheet, but nothing beats actual setups.  They are being used as part of a phono amp with ecc88's upfront and 300B's downstream.
V

I have some tasty 6J5s here rare brown base. Half of a 6SN7. I find with most tubes there is no real set parameter, usually is just trial and error, and you are right there is a sweet spot. That is why a variable resistor is handy. 

[hedalfa2]

I have some tasty 6J5s here rare brown base. Half of a 6SN7. I find with most tubes there is no real set parameter, usually is just trial and error, and you are right there is a sweet spot. That is why a variable resistor is handy.

Yes thats what Paul Baker and I have found, its trial and error. Getting the sweet spot can make quite a difference with some valves.