Yes another 2A3 design I am ready to be judged

[euro21]

D3a datasheet:
Limiting values Va max 220V.

Your traced -3V curve shows about 7mA at 220V, datasheet about 2-3mA, Triode Loadline about 2.6mA.


Is this the best operating point for this tube?
I'll stick to the 1-2V range.

 

[waltube]

This is the 7788 ( E810F) , beautiful tube
Triode mode

This is a E88C, triode

This is 417A

This is 6N1p, dual test

 

[mbrennwa]

D3a datasheet:
Limiting values Va max 220V.

Ooops. I guess the D3A is out.

Your traced -3V curve shows about 7mA at 220V, datasheet about 2-3mA

The datasheet curves look a bit like the result of a toddler playing with a curve template. I prefer my own measurements.