ECF801

TUBE miniature triode-pentode multi-unit tube utilizing a 9-pin Noval (B9A) base. It features a combined high-slope frame-grid triode alongside a sharp-cutoff radio frequency (R.F.) pentode - Heater Voltage (\(V_{f}\)): 6.3 VoltsHeater Current (\(I_{f}\)): 410 mA to 450 mA (Parallel AC/DC filament supply)Base Configuration: 9-Pin Noval (Designation 9C12 / B9A)Pentode Max Voltage: 250 VoltsTransconductance (\(g_{m}\)): ~6.0 mA/V (6,000 µmhos - The ECF801 vacuum tube crosses directly to the North American RETMA designation 6GJ7. In the Sylvania / Philips ECG replacement system, it is categorized and branded exactly as the 6GJ7 / ECF801