QF50

Tunable Q-band TR gas-discharge cell with primer electrodes for microwave receiver protection. Ionization rapidly isolates sensitive circuitry during transmission.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: -

Description

Ferranti QF50 is a tuneable Q-band T.R. gas-discharge cell using primer electrodes. It is characterized for roughly 20 kW nominal peak power, low leakage and microsecond recovery for microwave receiver protection.

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: -
Nominal heater current: -
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

MicrowaveTRSwitch

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Microwave T.R. gas-discharge cell; device-specific primer, breakdown, leakage, recovery, frequency and power data are retained in parameter rows.

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 Ferranti

Published operating points and test conditions from this source.

SECTION 1

MicrowaveTRSwitch

Characteristic

Loaded Q
- to 150
Low level maximum
Insertion loss
- to 2 dB
Low level maximum
Nominal peak power
20 kW
High power
Nominal mean power
8 W
High power
Maximum spike leakage energy
0.045 erg/pulse
High power
Maximum flat leakage power
25 mW
High power
Maximum recovery time to 3 dB
2 us
High power
Maximum recovery time to 1 dB
4 us
High power

Frequency

Tuning wavelength
8.4 to 8.8 mm
Q-band tuning range

Other

Primer supply voltage
-2000 V
Negative D.C.
Primer current
50 to 75 uA
Primer electrode