3 socket versions of Ei KT90, type II - who can explain? - Nunki

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3 socket versions of Ei KT90, type II - who can explain?

hello KT90 experts,

i have a couple of vintage KT90 tubes made by Ei (ex-yugoslavia) which are obviously be type II versions as their anode plates have these type II-typical spot-welded, not folded edges like a blade.

i am astonished about 3 version of their sockets. some tubes have thin black sockets, thickness ~ 1/5 inch, the other sockets are ~ 3/8 inch thick. in addition some the thick ones are brown and some are black coloured what make 3 different socket versions.

can anybody explain the reason for these socket variations? are there any differences in quality or even in sound?

thank you!

Nunki

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Topic - 3 socket versions of Ei KT90, type II - who can explain? - Nunki 11:55:49 09/3/13 (2)

"are there any differences in quality or even in sound?" No. - Chip647 18:21:48 09/3/13 (0)

RE: 3 socket versions of Ei KT90, type II - who can explain? - h00hbt 12:34:07 09/3/13 (0)

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