1P41

RCA 1P41 gas-filled head-on S-1 photoemissive detector with red/near-infrared sensitivity, peak response near 800 nm and gas amplification up to 8.5.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: -
Base pins: 3
Nominal heater: -

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: 3
Nominal heater voltage: -
Nominal heater current: -
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

PhotoemissiveDetector

X-ray radiationInterelectrode capacitances

Max plate voltage: 90 V

RCA 1P41 gas-filled S-1 head-on photoemissive detector. 1957 alternative absolute rating regimes: Rating I anode max 70 V, average cathode current max 3 µA, current density max 40 µA/in²; Rating II anode max 90 V, average cathode current max 1.5 µA, density max 20 µA/in². Promoted 90 V conditional on Rating II, cannot combine with Rating I current. Earlier 1950 peak cathode current max 5 µA. Max ambient 100 °C. Peak S-1 response 800±100 nm, median radiant sensitivity 0.008 A/W at 800 nm; median luminous sensitivity 90 µA/lm DC, 77 µA/lm at 5 kHz, 67 µA/lm at 10 kHz. Gas amplification factor max 8.5, dark current max 0.1 µA at 25 °C, interelectrode capacitance 1.8 pF. No heater.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

No source-specific operating conditions are recorded.