Early KT66 date coding

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Old_Iron
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Post by Old_Iron »

Hello everybody,

I just bought this babe and I can´t find information for this early model.

I'm trying to confirm the manufacturer (really GEC or rebranded?) and to know the date of manufacture.

As you can see, the only code printed is "L5" on the bottom of the base.

Thank you very much in advance.

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jonsnell electronic
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Post by jonsnell electronic »

L MO Valve Co. (prior to Oct.1951)
P GEC Shaw (prior to Aug.1948)
U MO Valve Co. (prior to Oct.1945)
X MO Valve Co. Springvale (prior to Oct.1951)
Y MO Valve Co. Moray (prior to Apr.1945)
Z MO Valve Co. Hammersmith
ZA MO Valve Co. Gateshead (prior to Mar.1957)
ZB MO Valve Co. Perivale
ZC MO Valve Co. Springvale (prior to Aug.1957)
ZD MO Valve Co. Dover (prior to Dec.1956)

5 is probably 1950

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blackbunny
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Post by blackbunny »

As it's GEC branded rather than Marconi or Osram, the date code could translate as L = 1955 and 5 = May. :hmmm:

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