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K51A

Rare-gas-filled microwave noise diode designed as a calibrated noise source for measurements in the 10 cm wavelength band.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 2 V / 3.5 A

Description

Rare-gas-filled microwave noise diode for the 10 cm wave band. Published ratings, characteristics, operating data, capacitances, microwave/noise data, or gauge-head data were retained according to the physical device and mapped only to compatible locked-schema fields.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: -
Nominal heater voltage: 2 V
Nominal heater current: 3.5 A
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

Diode

X-ray radiationInterelectrode capacitances

Max plate voltage: 140 V
Max cathode current: 300 mA

Gas-filled microwave noise diode; noise-source data retained as parameters.

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.

Data set 01

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Diode

Construction

Filling
Rare gas

Characteristics

Typical anode voltage
140 V
Typical anode current
200 mA
Noise temperature
16600 K
Noise level above 290 K
17.58 dB
Heating time minimum
15 sec
Ignition voltage
6000 V

Other

Maximum anode current
300 mA
Minimum anode current
100 mA
Ambient temperature minimum
-55 degC
Ambient temperature maximum
75 degC