8574

Broadband gas-filled transmit-receive switching tube designed to protect a microwave radar receiver from high-power transmitter pulses while permitting reception between pulses.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

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

Description

The 8574 is a broadband gas-filled transmit-receive tube used to protect a microwave receiver during transmitter pulses.

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 TR discharge section.

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

1964 RMA EIA

Published operating points and test conditions from this source.

SECTION 1

MicrowaveTRSwitch

Characteristics

Operational Frequency Minimum
8500 MHz
Operational Frequency Maximum
9600 MHz
Maximum VSWR
1.25 ratio
Ignitor Ignition Time
1 s
Ignitor Voltage Drop Minimum
-400 V
Ignitor Voltage Drop Maximum
-200 V
Spike Leakage Energy
0.3 erg
8900MHz; 200kW
Flat Leakage Power
0.1 W
8900MHz; 20kW
Insertion Loss
0.2 dB
Recovery Time
3 us
20kWPeak

Other

Maximum Transmitter Peak Power
20 kW