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8826

High-power UHF television klystron amplifier designed for broadcast transmitter service with substantial RF output and professional cooling requirements.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: B9A
Base pins: -
Nominal heater: 6 V / 16.4 A

Description

The 8826 is a high-power UHF television klystron amplifier. The supplied datasheet provides heater or filament data, maximum ratings, operating conditions, RF output information, and interelectrode capacitances where applicable.

Socket description

Small-button Noval 9-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B9A
Base pins: -
Nominal heater voltage: 6 V
Nominal heater current: 16.4 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

Klystron

X-ray radiationInterelectrode capacitances

Max plate voltage: 20000 V
Max cathode current: 5.5 A

Published ratings, characteristics, and operating data promoted from supplied 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

1971 RCA HB3 Binder 6 of 7

Published operating points and test conditions from this source.

SECTION 1

Klystron

Characteristics

Frequency Minimum
698 MHz
UHF television service
Frequency Maximum
890 MHz
UHF television service
Minimum Warm-up Time
180 s

Other

Maximum DC Beam Voltage
20 kV
Maximum DC Beam Current
5.5 A
Maximum DC Body Current
250 mA
Maximum DC Modulating-Anode Voltage
20 kV
Typical DC Beam Current, Visual
4.7 A
Visual 699.25 MHz
Typical DC Beam Current, Aural
2.4 A
Aural 703.75 MHz
Typical DC Body Current, Visual
70 mA
Visual 699.25 MHz
Typical DC Body Current, Aural
15 mA
Aural 703.75 MHz
Typical DC Modulating-Anode Voltage, Visual
0 kV
Visual 699.25 MHz
Typical DC Modulating-Anode Voltage, Aural
-6 kV
Aural 703.75 MHz
Typical Cathode Voltage
-18 kV
Visual/Aural
Typical Drive Power, Visual
10 W
Visual peak-of-sync
Typical Drive Power, Aural
1.1 W
Aural CW
Typical RF Output, Visual
31 kW
Visual peak-of-sync
Typical RF Output, Aural
12 kW
Aural CW
Gain, Visual
35 dB
Visual
Gain, Aural
40 dB
Aural
Efficiency, Visual
37 %
Visual
Efficiency, Aural
28 %
Aural