Quote:
Originally Posted by G6Tanuki
Is there any evidence of world-market manufacturers [ITT/Brimar/Sylvania/RCA/Tung-Sol/GE/Hytron/Raytheon being examples] ever producing an EAA91?
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ITT probably did through its German subsidiary SEL, though it would be interesting to compare envelope size and system construction to the various other variants.
Also, Philips was a world market manufacturer. It would be interesting to find out what double diode, if any, they marketed (and possibly manufactured) in for example their South American national organisations. Even though their valves were shipped as unlabeled bulk goods from and to their own and 3rd party factories all over the world, some local markets would have seen more local production than others, especially if they had their own preferred types.