Great Britain EL84

[gary sanders]

I have a quad of EL84 tubes that are branded Stromberg Carlson made in Great Britain.Could these be by Mullard? A stamp or other marking I should look for?

[Firestorm]

Look for production codes etched on the glass near the base; probably one line of three characters above a line of 4 characters.

[Cantplay]

Round 'smoke hole' in the plates. Etch code beginning with B indicates Blackburn plant.

There were other other 'real' Mullards with rectanbgular holes, but I've only seen those with shield logo.

If you post a clear picture of the plates I can probably identifiy them, I have a dozen different types of EL84 to compare to.

John

[gary sanders]

I will do that when I get home.Ive tested them all in my SE amp and they work and sound great,they just look odd on the inside like they actually have got smoky on the inside.I just figured cause theyre old as hell.Post a pic soon