BA920

Prefocused X-band backward-wave oscillator electronically tunable from 7–11.5 GHz, supporting multiple modulation modes and producing up to about 180 mW.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: 6.3 V / 1.7 A

Description

Demountable prefocused X-band backward-wave oscillator for electronically tuned microwave generation. The datasheet specifies amplitude, pulse or frequency modulation, forced-air cooling, delay-structure operating conditions and output power of at least 20 mW.

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: 6.3 V
Nominal heater current: 1.7 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

TravelingWave

X-ray radiationInterelectrode capacitances

Rectifier warm-up time: 60 s

Backward-wave oscillator electron-beam/delay-structure section; ordinary plate-grid metrics are not directly applicable.

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 Mullard

Published operating points and test conditions from this source.

SECTION 1

TravelingWave

Other

Delay-structure voltage maximum
1400 V
Delay-structure voltage minimum
250 V
Cathode current maximum
28 mA
Anode voltage maximum
500 V
Anode current maximum
10 mA
Frequency minimum
7 GHz
Frequency maximum
11.5 GHz
Frequency
8 GHz
Delay-structure voltage
390 V
f=8GHz
Output power
52 mW
f=8GHz
Frequency
9.4 GHz
Delay-structure voltage
630 V
f=9.4GHz
Output power
100 mW
f=9.4GHz
Frequency
11 GHz
Delay-structure voltage
1090 V
f=11GHz
Output power
120 mW
f=11GHz

Characteristics

Frequency sensitivity minimum
2 MHz/V
Frequency sensitivity maximum
10 MHz/V
Output power minimum
20 mW
Output power maximum
180 mW