GMI-32B-1
High-power pulse modulator tetrode
Description
Purpose and application
GMI-32B-1 is a high-power pulse modulator tetrode for switching pulse power up to 3.6 MW in stationary and mobile radio equipment. It is a distinct execution and must not be selected as GMI-32B solely by a similar designation.
Full descriptionCollapse description
Construction
The metal-glass construction uses an indirectly heated oxide cathode, external finned anode and ceramic insulated terminals. Heater voltage is 24.3–29.7 V; for pulse anode currents above 50 A the lower limit is 25.6 V. Heater current is 10 ± 0.7 A.
Operating data
Pulse anode current is at least 85 A at 24.3 V heater voltage and at least 100 A at 27 V. Input capacitance is 160 pF, output capacitance 26 pF and transfer capacitance no more than 1 pF. Readiness time is no more than three minutes.
Cooling and selection
Forced-air cooling is mandatory, with airflow of at least 110 m³/h for the anode and 30 m³/h for the stem. The maximum anode voltage is 40 kV, maximum anode dissipation is 2 kW and minimum service life is 1000 hours.
Vacuum device construction is outlined in the vacuum tube article. Related devices are listed under generator and modulator tubes.
Technical details
- Designation
- GMI-32B-1
- Device type
- High-power pulse modulator tetrode
- Purpose
- Pulse-power switching up to 3.6 MW
- Construction
- Metal-glass with external finned anode
- Cathode
- Indirectly heated oxide cathode
All specificationsCollapse specifications
- Heater voltage
- 24.3–29.7 V
- Heater current
- 10 ± 0.7 A
- Minimum pulse anode current at 24.3 V heater voltage
- 85 A
- Minimum pulse anode current at 27 V heater voltage
- 100 A
- Maximum pulse first-grid current
- 15 A
- Maximum pulse second-grid current
- 9 A
- Maximum readiness time
- 3 min
- Input capacitance
- 160 pF
- Output capacitance
- 26 pF
- Maximum transfer capacitance
- 1 pF
- Maximum anode voltage
- 40 kV
- Maximum anode dissipation
- 2 kW
- Anode airflow
- 110 m³/h
- Stem airflow
- 30 m³/h
- Ambient temperature
- −60 to +85 °C
- Minimum service life
- 1000 h
Payment & delivery
Orders ship from our hub in Dubai. Partner stock is first transferred to Dubai, then shipped to you.
Dubai stock: 100% before dispatch. Partner stock (Remote stock) and Pre-order: 50% advance payment to start the order and 50% before shipment from Dubai to you.
Availability, lead time, delivery cost and payment terms are confirmed for your order before payment.
Payment & delivery terms