MTH-90

Description

Thyratron MTH-90 (MTX-90) glow discharge with a cold cathode and gas filling in a glass shell.
Designed to convert low power electrical signals and to work as an ionic relay.
Used in various general purpose radio devices.

Indicator thyratrons are a special class of glow discharge thyratrons. Their purpose is not so much switching electrical circuits as indicating. Unlike simple neon lamps, they are capable of being controlled by reduced voltages and also remembering their state, thereby relieving the computer system that controls them to perform other tasks. Some indicator thyratrons are coated with a phosphor and produce colors other than orange-red.

Indirectly heated oxide cathode.
Works in any position.
Wire output socket with 3 terminals.The cylinder is filled with neon.

Technical specifications: 

• Is the brightness more than 80 cd/m
• Viewing angle more than 60°
  Anode voltage:
• with a free grid less than 200V
• when the grid connected to the cathode is less than 140V
• at grid current 1µA 85..150V

Discharge occurrence voltage:

• in the anode-cathode gap less than 150V
• in the grid-cathode gap 65..90V

Discharge maintenance voltage:

• between anode and cathode less than 65V
• between grid and cathode 85V

Grid current of discharge occurrence:

• at Ua=150V more than 2µA
• at Ua=120V 8-40µA
• at Ua=85V less than 100µA

Anode current:

• in relay mode (amplitude) less than 35mA
• in relay mode (average) less than 7mA
• in trigger mode (amplitude) less than 4mA
• in trigger mode (average) less than 2mA
• Input signal amplitude 1.5V – 15V
• Electrical strength recovery time more than 800µA

Durability:

• in trigger mode 4000 hours
• in relay mode 5000 cycles