EL84 as driver stage

[catalin gramada]

Hello. found a bunch of el84 I can use to drive a pair of kt88. I understand can be a very good candidate for that instead a 12au7.Unfortunately I did not found in any datasheet design refereces how to implement it in triode mode.I expect a moderate gain around 20 into 100k load with ca. 3v at input.
Can I conect screen grid to plate and use the graph caracteristics and design like any regular triode?I don.t know how to design the stage. Can You help me with one sugestion.please? Thanks.

[dchang0]

This link goes directly to an EL84 triode-mode graph that you can use:

http://www.4tubes.com/DATASHEETS/SCA...RIODE-MODE.gif

Perhaps the point at 300V they indicate as dissipating 14 watts is a good choice for you--they probably chose it for some reason rather than randomly.

As for how to wire it into triode mode, I believe Merlin's books cover "strapping a pentode as triode" but it has been a while since I read them, so I could be wrong. Personally I strapped a 6BMQ pentode as a triode without using any resistor, just a direct connection, but I do not know if this is good or bad.