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STC V271C/3M floating drift tube klystron

Size This klystron measures 108x135x47mm overall and has an 8 pin base.

 

 

V271C/3M
Pin Function
1 Heater
2 Cathode
3 Screen grid
4 Anode
5 Drift tube
6 Control grid
7 Resonator
8 Heater

 

Heater voltage 6.3V
Heater current 250mA
Max anode voltage 600V
Max resonator voltage 600V
Max drift tube voltage with respect to resonator 200V
Max screen voltage 400V
Max anode dissipation 27W
Max resonator dissipation 18W
Max drift tube dissipation 3W
Max screen dissipation 2W
Max total dissipation for all electrodes except heater 40W
Max cathode current 65mA
Max mica window seal temperature 130C
Max temperature of any other part of envelope 300C

Typical operating conditions for operation in Mode 15 (3.75 cycles) and Mode 19 (4.75 cycles). The Mode numbers are the number of quarter periods of oscillation occupied by electrons in transit through the drift space.

Mode 15 frequency modulated oscillator 6850 to 7350MHz

Anode voltage 550V
Resonator voltage 530V
Grid voltage -50V
Drift tube voltage 395 to 505V
Screen voltage, approx., to give cathode current of 60mA and anode current of 30 to 40mA 180V
Min. power output 800mW
Electronic tuning between half power points +/-8.5MHz
Modulation sensitivity when loaded for max power 250 to 450kHz/V

Mode 19 oscillator 6850 to 7350MHz

Anode voltage 370V
Resonator voltage 350V
Grid voltage -50V
Drift tube voltage 240 to 310V
Screen voltage, approx., to give cathode current of 45mA and anode current of 22 to 30mA 120V
Min power output 200mW
Electronic tuning between half power points +/-6MHz
Modulation sensitivity when loaded for max power 450 to 650kHz/V

 

The klystron has two faces, one marked OUTPUT, the other marked TUNER. V271C/3M

Internal view

The picture above shows the inside of the 'output' side of the klystron. The one below shows that of the 'tuner' side, which is marked 18JH and 40JG.

Internal view

Side viewSide view showing the magnet.

Quarter view Quarter view

Above are pictures of each side of the device, and below is a picture of the bottom.

Bottom view

Data provided by Frank Philipse

 

This file was last modified 14:56:32, Tuesday September 02, 2014