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Power - Tetrode (NOT beam) (over 1000V 100W) ·Tetrode

RS2026CL

Forced-air-cooled coaxial tetrode for high-power television transmitters to approximately 300 MHz.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 9.5 V / 86 A

Description

Coaxial metal-ceramic-tetrode, forced-air-cooled, for frequencies up to 300 MHz, particulary suitable for TV transmitters in grounded control-grid circuit. The radiator and the terminals are of concentric design with the following diameters: Anode terminal Ø 103,0 Heater/cathode terminal Ø 52,6

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: 9.5 V
Nominal heater current: 86 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

Transconductance: 0.07 S
Amplification factor: 7.4
Max plate voltage: 7000 V
Max screen voltage: 1000 V
Max plate dissipation: 16000 W
Max screen dissipation: 150 W
Max grid dissipation: 50 W
Max cathode current: 8 A

Maximum ratings promoted from published rating tables; additional condition-specific values preserved in 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

1963 Siemens

Published operating points and test conditions from this source.

SECTION 1

Tetrode

Characteristics

Amplification factor
7.4
Transconductance
70000 µS
Emission current at UA = UG2 = UG1 = 300 V
35 A V
Amplification factor of screen grid
7,4
at UA = 2 kV, UG2A = 600
1000V, IA = 3 A kV
Transconductance
70 mA/V mA/V
at UA = 2 kV, UG2 = 800 V, I A = 2,5
3,5 A kV

Other

Heater voltage
9,5 V V
Heater current
≈ 86 A A
Frequency
250 MHz MHz
Anode voltage (dc)
7,0 kV 1) kV
Screen grid voltage (dc)
1000 V 1) V
Control grid voltage (dc)
– 250 V V
Cathode current (dc)
8,0 A A
Peak cathode current
35 A A
Anode dissipation
16 kW kW
Screen grid dissipation
150 W W
Control grid dissipation
50 W W
Frequency
220 MHz MHz
Bandwidth (– 3 dB)
10 MHz 2) MHz
Bandwidth (– 1,2 dB)
5,6 MHz 2) MHz
Output power, sync. level
22 + 0,65 3) kW 4) 8) kW
Output power, black level
12,3 + 0,36 3) kW 4) 5) kW
Anode voltage (dc)
6,5 kV 1) kV
Screen grid voltage (dc)
850 V 1) V
Control grid voltage (dc)
– 95 V 6) V
Peak control grid voltage (ac), sync. level
160 V V
Anode current (dc), black level
4,1 A 5) A
Screen grid current (dc), black level
130 mA 5) mA
Control grid current (dc), black level
70 mA 5) mA
Anode input power, black level
26,6 kW 5) A
Drive power, sync. level
14 + 650 3) W 7) W
Anode dissipation, black level
14,3 kW 5) kW
Screen grid dissipation, black level
100 W 5) W
Control grid dissipation, black level
5 W 5) W
Anode load resistance
700 Ω Ω
Transmitter Tetrode
2026 CL
The
4464 is available for tube operation in TV band lll (accessories).
The temperature of the metal-ceramic seals must not
220 °C at any point and the
temperature of the internal cathode terminal must not
250 °C. These requirements can be
gram
25 ° inlet temperature at a normal air pressure of 1 bar (sea level). The cooling air a
Transmitter Tetrode
2026 CL

Capacitance

Cathode/control grid
≈ 75 pF pF
Cathode/screen grid
≈ 5,9 pF pF
Cathode/anode
≈ 0,08 pF 1) pF
Control grid/screen grid
≈ 127 pF pF
Control grid/anode
≈ 0,77 pF 1) pF
Screen grid/anode
≈ 21 pF pF
Transmitter Tetrode
2026 CL

Cooling

Transmitter Tetrode
2026 CL
Transmitter Tetrode
2026 CL