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CV15 (E1266), low power version of the VT90 micropup without the anode fins and with a bolt-down heatsink for conduction cooling instead. It was used in the 70cm ASV (Air-Surface Vessel) radar at first, producing 10kW in push-pull pairs at 1µs pulses/1500pps. This radar later used the NT99.

CV15 end view

CV15 side view

Markings on the valve are 37K, Up-ArrowP on one side of the block, and CV15 stamped on the other.

Filament voltage3.25V
Filament current6.75A
Max anode voltage4kV
Max anode dissipation1W
Amplification factor (at Va=500V, Ia=20mA)15.5
Max operating frequency300MHz

Cooling should be provided so that the temperature of the anode does not exceed 140C, even if just the filament volts are applied.


This file was last modified 15:43:12, Tuesday September 02, 2014