6LN8 OK for ecf80 duty?

[Thenice]

Thank you John
I am aware that dates don t mean that much
Something l read ages ago said that valves shouldn't be more than 15% above 1.00 [spec]or below it was as a standard resistors as a must lam not claiming l know just something l recall wonder what's its like nowadays
Thanks for your answer l appreciate it when people make sure of things
Thanks again
Frank
Ps an interest l have doesn't make me qualified so l ask if l can