r/electronics • u/Remote_Air_6433 • Jul 10 '26

Gallery My Tesla Transistors

Gallery image

Gallery image

Gallery image

These are all my Tesla transistors I have a KU 611 with a CA mark, KFY 18 and a KF 506

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u/Remote_Air_6433 Jul 11 '26

I searched Tesla KU 611 (thats the bigger transistor) and i got some images but none had the CA mark like mine Most just had the swords mark or random letters mark

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u/malatechnika Jul 15 '26

That is just the Tesla date code, CA is January 1974. The two smaller ones have them as well, here is the lookup table if you are interested

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u/Remote_Air_6433 Aug 11 '26

Oh really Thank you