Brans cross-lists in damper group (table IIf via 6V3P). Similar damper function but Octal base vs Noval — not pin-compatible.
Electrical Specifications
Absolute Maximum
Heater-to-Cathode Voltage (max)Max Peak Heater-Cathode Voltage (heater negative)750V
Rectifier
Peak Inverse VoltageMaximum Peak Inverse Voltage (damper service)6,000V
AC Plate Voltage (RMS, max)Maximum AC Plate Voltage RMS (half-wave rectifier)350V
Voltage Drop (typical)Average Tube Drop (at 150 mA)14
Notes
Base is Miniature Button 9-Pin (JEDEC 9BD). Brans Vademecum table IIf lists 6V3(A) with equivalent PY71.
MIL-HDBK-213A classifies as 'Receiving diode, damper' and lists 6V3A as the other number for 6V3.
GE Essential Characteristics lists base as 9BD for both 6V3 and 6V3-A.
Datasheet is marked 'TENTATIVE DATA' and covers the 6V3A. The 6V3A is an improved version of the 6V3.
DC component of heater-cathode voltage must not exceed 750 V with heater negative. This is a high Vhk rating suitable for horizontal-deflection damper service where the cathode swings to high B+ levels.
The tube should be adequately ventilated as with other power-handling tubes.
Sams Substitution Handbook lists EY81F as a substitute for 6V3.
Damper service ratings: PIV 6000 V, peak plate current 600 mA, max DC output current 135 mA. Half-wave rectifier ratings: max AC plate voltage 350 V RMS, max DC output current 125 mA.
Filter input capacitor limited to 20 uF in half-wave rectifier service. Minimum total effective plate supply voltage is 145 V.
Pin Layout — Noval
1No Connection
2Plate
3Internal Connection
Socket-Compatible Tubes ⚠ Not electrically compatible