8578

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 8578 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
2700 MHz
Operational Frequency Maximum
2900 MHz
Maximum VSWR
1.2 ratio
Isolation Minimum
20 dB
IgnitorCurrent=0
Spike Leakage Energy Maximum
0.1 erg
2800MHz; 200kW
Flat Leakage Energy Maximum
0.2 erg
2800MHz; 300kWp
Recovery Time Maximum
10 us
600kWPeak

Other

Ignitor Current Minimum
100 uA
Ignitor Current Maximum
200 uA
Maximum Transmitter Peak Power
1 MW