Low-voltage remote-cutoff pentode for automobile-radio RF/IF amplification, designed to operate its heater, plate, and screen directly from a 12 V battery.
Low-voltage remote-cutoff pentode for automobile-radio RF/IF amplification with heater, plate, and screen supplies obtained directly from the vehicle battery.
Sylvania pentode documented in manufacturer literature. The available source does not provide sufficiently readable application or cutoff detail beyond its placement in the sharp-cutoff population, so classification remains conservative.
Remote-cutoff miniature pentode for automobile-receiver IF and RF amplification, optimized for low plate voltage and automatic-volume-control operation.
Seven-pin miniature sharp-cutoff pentode documented for fixed-gain signal-amplifier service. Manufacturer sources provide its electrical ratings and operating characteristics without indicating a stronger specialized functional identity.
Fully shielded subminiature directly heated RF pentode designed for low-drain battery equipment. Its compact construction and economical filament requirements suit portable high-frequency signal-amplifier applications where power consumption and space are restricted.
Directly heated remote-cutoff RF pentode with a 1.4 V, 25 mA filament. Designed for Class A high-frequency amplification, it combines low filament drain with variable-gain capability for portable battery receivers.
Directly heated variable-mu pentode designed for RF and IF amplification. Its controlled transfer characteristic supports gain-regulated receiver stages while the filamentary cathode suits low-power equipment.
Directly heated variable-mu pentode intended for RF and IF amplification. The variable-mu characteristic permits controlled receiver gain, while its filamentary construction supports compact low-power signal equipment.
Directly heated subminiature Russian pentode designed for high-frequency voltage amplification. Its compact construction and filamentary cathode suit miniature RF signal equipment where small physical size and low heater demand are important.
Directly heated subminiature Russian pentode for high- and intermediate-frequency voltage amplification. It is a compact RF/IF signal tube intended for miniature equipment rather than power-output service.
Very-low-consumption Soviet multi-control pentode for RF amplification, oscillation, and frequency conversion. Two control grids support mixer and oscillator functions while an exceptionally economical filament suits battery-powered equipment.
Directly heated variable-mu pentode designed for RF and IF amplifier service in battery receivers. Its low-power filament and gain-control characteristic make it a widely applicable portable-receiver signal tube.
Subminiature electrometer pentode with exceptionally low filament-current requirements. Designed for ultra-low-current measurement circuits, it serves sensitive electrometer instrumentation where input loading and heater power must be kept extremely small.
Radiation-cooled directly heated miniature voltage-amplifier pentode, co-designated with 6008 in manufacturer literature. It is intended for compact signal-amplifier service using a filamentary cathode rather than conventional indirectly heated construction.
Radiation-cooled directly heated miniature voltage-amplifier pentode, co-designated with 5911 in manufacturer literature. Its filamentary cathode and compact construction suit miniature signal-amplifier applications rather than power-output service.
Directly heated subminiature pentode for resistance-coupled audio and direct-coupled amplifiers. Manufacturer documentation emphasizes low battery drain, long life, and low microphonics, making it well suited to compact low-level audio equipment.
Directly heated subminiature low-power pentode. Manufacturer operating tables document compact signal-amplifier service with low heater demand, making it suitable for miniature equipment where power consumption and physical size are constrained.
Ultra-low-drain directly heated subminiature pentode for voltage amplification in portable and wearable equipment, using only a 0.625 V, 10 mA filament.
Russian pentode for both high- and low-frequency voltage amplification using a low-voltage anode and screen supply. Its broad signal-amplifier role is distinguished by operation from comparatively low supply voltages.
Subminiature frame-grid sharp-cutoff pentode for VHF RF/IF amplification and mixer service at unusually low plate voltage. Severe-environment construction suits airborne, military, and demanding professional electronics.
Directly heated Raytheon subminiature pentode for low-power amplifier service in portable and wearable equipment. Its tiny filament demand and compact construction target battery-operated personal electronics.
Low-voltage remote-cutoff pentode for automobile-radio RF/IF amplification, designed to operate its heater, plate, and screen directly from a 12 V battery.
Low-voltage remote-cutoff pentode for automobile-radio RF/IF amplification with heater, plate, and screen supplies obtained directly from the vehicle battery.
Sylvania pentode documented in manufacturer literature. The available source does not provide sufficiently readable application or cutoff detail beyond its placement in the sharp-cutoff population, so classification remains conservative.
Remote-cutoff miniature pentode for automobile-receiver IF and RF amplification, optimized for low plate voltage and automatic-volume-control operation.
Seven-pin miniature sharp-cutoff pentode documented for fixed-gain signal-amplifier service. Manufacturer sources provide its electrical ratings and operating characteristics without indicating a stronger specialized functional identity.
Fully shielded subminiature directly heated RF pentode designed for low-drain battery equipment. Its compact construction and economical filament requirements suit portable high-frequency signal-amplifier applications where power consumption and space are restricted.
Directly heated remote-cutoff RF pentode with a 1.4 V, 25 mA filament. Designed for Class A high-frequency amplification, it combines low filament drain with variable-gain capability for portable battery receivers.
Directly heated variable-mu pentode designed for RF and IF amplification. Its controlled transfer characteristic supports gain-regulated receiver stages while the filamentary cathode suits low-power equipment.
Directly heated variable-mu pentode intended for RF and IF amplification. The variable-mu characteristic permits controlled receiver gain, while its filamentary construction supports compact low-power signal equipment.
Directly heated subminiature Russian pentode designed for high-frequency voltage amplification. Its compact construction and filamentary cathode suit miniature RF signal equipment where small physical size and low heater demand are important.
Directly heated subminiature Russian pentode for high- and intermediate-frequency voltage amplification. It is a compact RF/IF signal tube intended for miniature equipment rather than power-output service.
Very-low-consumption Soviet multi-control pentode for RF amplification, oscillation, and frequency conversion. Two control grids support mixer and oscillator functions while an exceptionally economical filament suits battery-powered equipment.
Directly heated variable-mu pentode designed for RF and IF amplifier service in battery receivers. Its low-power filament and gain-control characteristic make it a widely applicable portable-receiver signal tube.
Subminiature electrometer pentode with exceptionally low filament-current requirements. Designed for ultra-low-current measurement circuits, it serves sensitive electrometer instrumentation where input loading and heater power must be kept extremely small.
Radiation-cooled directly heated miniature voltage-amplifier pentode, co-designated with 6008 in manufacturer literature. It is intended for compact signal-amplifier service using a filamentary cathode rather than conventional indirectly heated construction.
Radiation-cooled directly heated miniature voltage-amplifier pentode, co-designated with 5911 in manufacturer literature. Its filamentary cathode and compact construction suit miniature signal-amplifier applications rather than power-output service.
Directly heated subminiature pentode for resistance-coupled audio and direct-coupled amplifiers. Manufacturer documentation emphasizes low battery drain, long life, and low microphonics, making it well suited to compact low-level audio equipment.
Directly heated subminiature low-power pentode. Manufacturer operating tables document compact signal-amplifier service with low heater demand, making it suitable for miniature equipment where power consumption and physical size are constrained.
Ultra-low-drain directly heated subminiature pentode for voltage amplification in portable and wearable equipment, using only a 0.625 V, 10 mA filament.
Russian pentode for both high- and low-frequency voltage amplification using a low-voltage anode and screen supply. Its broad signal-amplifier role is distinguished by operation from comparatively low supply voltages.
Subminiature frame-grid sharp-cutoff pentode for VHF RF/IF amplification and mixer service at unusually low plate voltage. Severe-environment construction suits airborne, military, and demanding professional electronics.
Directly heated Raytheon subminiature pentode for low-power amplifier service in portable and wearable equipment. Its tiny filament demand and compact construction target battery-operated personal electronics.
