Tubes: 4 x 811A triodes

Power supply: 1000V ~500mA filtered DC

Primary: 2 x 18 turns (parallel, #14 AWG)

Secondary: about 2000 turns (#31 AWG)

Filament transformer: 6.3V 16A

Tank capacitor: 3 x 1nF 15kV

Grid-leak resistor: 2.5k 50W