KT66 OUTPUT BEAM TETRODE MATCHED PAIR CLEAR GLASS BROWN BASE SAME FACTORY CODE  FROM APRIL 19647
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KT66 OUTPUT BEAM TETRODE MATCHED PAIR CLEAR GLASS BROWN BASE SAME FACTORY CODE  FROM APRIL 19647 KT66 OUTPUT BEAM TETRODE MATCHED PAIR CLEAR GLASS BROWN BASE SAME FACTORY CODE  FROM APRIL 19647

KT66 OUTPUT BEAM TETRODE MATCHED PAIR CLEAR GLASS BROWN BASE SAME FACTORY CODE FROM APRIL 19647

  • £285.00

Only 1 left!

Well, here's a tasty pair of device  both clear glass "coke bottle' KT66 in GEC livery.  

The device carries markings in excellent white ink, a classic GEC/M-OV military cartouche with a date code of UD which equates to April 1964 and factory code Z which indicates Highgrove 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 = 73 mA.

gm1 = 5.9 mA/V.

Ia2 = 73 mA.

gm2 = 5.8 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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