6BE8A

Plate resistance

5000 Ω

Transconductance

0.008 S

Amplification factor

40

Max plate voltage

300 V

Max plate dissipation

2.5 W

Sylvania 6BE8A triode oscillator section; manufacturer states electrically identical to 6BE8 except controlled heater warm-up about 11 s for 6.3 V 450 mA series-string TV service. Physical triode and sharp-cutoff pentode are separate sections. This triode maximum plate 300 V and dissipation 2.5 W; typical at plate 150 V, cathode resistor 56 Ω, current 18 mA, mu 40, gm 8000 µmhos (0.008 S), rp approximately 5000 Ω. Triode cathode connects internally to pentode suppressor grid and shield. Manufacturer 9EG basing and interelectrode capacitances.

Plate resistance

400000 Ω

Transconductance

0.0052 S

Max plate voltage

300 V

Max plate dissipation

2.8 W

Max screen dissipation

0.5 W

Sylvania 6BE8A pentode mixer section electrically identical to 6BE8 except controlled approximately 11-second heater warm-up in 6.3 V 450 mA series-string TV service. Design-center maximum plate 300 V, plate dissipation 2.8 W, screen dissipation 0.5 W; grid-2 SUPPLY up to 300 V with actual screen electrode voltage constrained by manufacturer rating chart (not promoted to unconditional max_screen_voltage). Typical at plate 250 V, screen 110 V and cathode resistor 68 Ω: plate 10 mA, screen ~3.5 mA, gm 5200 µmhos (0.0052 S), rp 400 kΩ. Pentode suppressor grid No.3 and internal shield internally tied to separate triode cathode; manufacturer 9EG basing and capacitances.