Alternatives & variations Download PDF datasheet

4282B

Standard Valves directly heated tetrode with published electrical and operating data. Its power construction supports output-stage service rather than receiving-type small-signal amplification.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: UX4
Base pins: 4
Nominal heater: 10 V / 3 A

Description

The 4282B is a tetrode described in the Standard Valves datasheet, using a directly heated filament cathode and published operating data.

Socket description

Medium-shell UX 4-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: UX4
Base pins: 4
Nominal heater voltage: 10 V
Nominal heater current: 3 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

Tetrode

X-ray radiationInterelectrode capacitances

Plate resistance: 70000 Ω
Max plate voltage: 1000 V
Max screen voltage: 250 V
Max plate dissipation: 70 W
Max screen dissipation: 5 W
Max cathode current: 100 mA

Ratings and characteristics extracted from 4282B.pdf.

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

1937 Standard Valves

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristics

Total emission
125 A
Published datasheet value
Grid-anode capacitance
0.2 pF
Published datasheet value
Output capacitance
68 pF
Published datasheet value

Other

Maximum frequency for above ratings
30 MHz
Published datasheet value
Maximum direct grid current
50 mA
Published datasheet value

Data set 02

1946 Standard Telephone and Cables

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristic

Filament voltage
10 volts
Nominal filament curren
3 amps
Total emission
1.25 amps
|mpedance
70000 ohms

Other

gt Vp =
1000 volts
Maximum direct anode voltage
1000 volts
Maximum direct anode curren
0.1 amps
Maximum anode dissipation
70 watts
Maximum direct grid curren
0.05 amps
Maximum screen-grid voltage
250 volts
Maximum screen-grid dissipation
5 watts
Maximum frequency for above ratings
30 Mc
Maximum anode voltage for frequency o
60 Mc
Direct anode voltage 1,000 750 750 500 1,000
750 volts
Direct anode current 0-100 0-100 0-100 0-100 0-100
0.1 amps
Direct screen-grid voltagel 150 150 150 150 150
150 volts
Carrier output 33 25 50 33 67
50 watts
Anode dissipation 67 50 27 17 33
25 watts