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KT66, GEC, Matched Pair,Clear Glass, Brown Base, Same Factory Code, Aug/Sept 1962, Hammersmith Production
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KT66, GEC, Matched Pair,Clear Glass, Brown Base, Same Factory Code, Aug/Sept 1962, Hammersmith Production KT66, GEC, Matched Pair,Clear Glass, Brown Base, Same Factory Code, Aug/Sept 1962, Hammersmith Production KT66, GEC, Matched Pair,Clear Glass, Brown Base, Same Factory Code, Aug/Sept 1962, Hammersmith Production

KT66, GEC, Matched Pair,Clear Glass, Brown Base, Same Factory Code, Aug/Sept 1962, Hammersmith Production

  • £265.00

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KT66, GEC, Matched Pair,Clear Glass, Brown Base, Same Factory Code, Aug/Sept 1962, Hammersmith Production

These devices carry markings in excellent white ink, a classic GEC/M-OV military cartouche with a date code of UD which equates to Aug/Sept 1962 and factory code Z which indicates Hammersmith manufacture.  The brown low loss micanol bases are both tight to the valve envelopes.

These devices have been tested using our AVO VCM163 against the specification for 100% emission of anode current, Ia =63 mA; mutual conductance gm = 6.3 mA/V @ At Va = 250V Vg = -15V.

The results obtained were:-

Ia1 = 79 mA.

gm1 = 6.0 mA/V.

Ia2 = 79 mA.

gm2 = 6.1 mA/V.

These test figures indicate  a very strong pair of devices with supreme matching, truly a superb matched pair - not to be missed.  


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