Alternatives & variations Download PDF datasheet

CV2171

VHF tungsten-filament noise-generator diode designed as a calibrated noise source for receiver and noise-factor measurements, with typical operation extending to approximately 220 MHz.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: B7G
Base pins: 7
Nominal heater: 4.3 V / 600 mA

Description

A VHF noise-generator diode with a tungsten filament. The A2087 is a commercial equivalent of the CV2171.

Socket description

Miniature 7-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B7G
Base pins: 7
Nominal heater voltage: 4.3 V
Nominal heater current: 600 mA
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: 200 V
Max plate dissipation: 2 W
Max cathode current: 20 mA

Explicit commercial-equivalent designation on A2087 datasheet.

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

1968 General Electric Co

Published operating points and test conditions from this source.

SECTION 1

Diode

Other

AnodeCurrentMax
20 mA
FilamentVoltageMax
4.8 V
Filament voltage range
0 to 4.3 V
Filament current (approx at Vf
4.3 V
Filament current (approx at Vf 4 3 V)
600 mA
voltage With a
6.3 V
Anode voltage
200 V
MAXIMUM RATINGS
Anode current
20 mA
MAXIMUM RATINGS
Anode dissipation
2 W
MAXIMUM RATINGS
Filament voltage
4.8 V
MAXIMUM RATINGS
Anode voltage
40 V
MAXIMUM RATINGS
Saturated anode current (approx)
7 mA
MAXIMUM RATINGS
Filament voltage (approx)
3.7 V
MAXIMUM RATINGS
Noise Diode for use up to
220 MHz
TYPICAL OPERATION
Anode voltage 100 100
100 V
TYPICAL OPERATION
Saturated anode current range 0-20 0-20
0 to 20 mA
TYPICAL OPERATION
Filament voltage range (approx) 0-4 3 0-4 3
0 to 4.3 V
TYPICAL OPERATION
range (approx) 0-13 0-14 5
0 to 20.8 dB
TYPICAL OPERATION
a saturated current of
5 mA
TYPICAL OPERATION
a saturated current of 5 mA With a saturated current of
20 mA
TYPICAL OPERATION
above is necessary for use up to
220 MHz
TYPICAL OPERATION

Characteristic

AnodeVoltageCharacteristic
40 V
SaturatedAnodeCurrent
7 mA
Anode to fi lament (approx)
1.35 pF
CAPACITANCES (measured on a cold valve fitted with external
Anode to all (approx)
2.7 pF
CAPACITANCES (measured on a cold valve fitted with external