The anode connects via a top cap (JETEC No. C1-1), not through the base pins. This is essential for high-voltage insulation and RF use.
Cathode bias is not recommended for Class AB2 operation; fixed bias only. For Class AB1 pentode, Rg_max is 0.1 MΩ with fixed bias and 0.5 MΩ with cathode bias.
Datasheet operating values for AF push-pull configurations are given for 2 tubes; per-tube output is half the stated value.
The 807 was originally designed for RF transmitter service. Audio applications are secondary, and RCA did not initially publish AF push-pull data.
Significant quality variation exists among WWII-era manufacturers. British service designations (VT60, CV124) may have different actual ratings based on manufacturer.
The 6L6/6BG6 family shares similar electrical characteristics but uses an octal base with internal anode connection — not pin-compatible.
G-807 (Г-807) is the Russian designation equivalent (tubemaze.info Russian equivalents).
Philips interchange guide cross-references QE06/50 as replacement (CV124).
Pin Layout — UX5
1Heater
2Screen Grid (g2)
3Control Grid (g1)
4Cathode
5
Socket-Compatible Tubes ⚠ Not electrically compatible