OTOH I’m liking that its octal due to my left hand motor control improving but not mended.
So as an input valve, the only capacitance data is a,g1 which is stated as :
But what is that, is it 1 pf? If so it compares close enough to el84 which is 0.7pf. Hence acceptable and as its easier for me to work with and looks cooler. I’d like to use it.

Firstly is my conversion correct, secondly is the input capacitance low enough for an input valve?
Did you know some of these Mullard EL33’s were mesh plate ? But they want £60 plus postage . Shucks!
Anyway I have two that are grey plate for nothing, those will have to do.
Or, shall I connect the EL33 in pentode for input valve duty?
"Two things are infinite, the universe and human stupidity, and I am not yet completely sure about the universe." – Albert Einstein