Please click your language flag. Bitte Sprachflagge klicken.


Information - Help 
ID = 37813
United States of America (USA)
Brand: Raytheon Mfg. Co.; Cambridge, MA
Tube type:  Magnetron   Text 
Identical to QK60 = 4J61
Predecessor Tubes CM16B  

Base Octal (Int.Octal, IO) K8A, USA 1935
Was used by Radar
Filament Vf 6.3 Volts / If 3.8 Ampere / Half indirect

CW / pulse magnetron for radar jammers. The device was designed for variable duty cycle and may be basically considered as CW. Integral magnet, coaxial output.

Derived from the CM16B S-band CW experimental magetron built at MIT Radiation lab. and described by G.B. Collins in Microwave Magnetron

Typical operation

  • Up to 2 kW input pulses, depending upon the duty cycle.
  • 125 mA at 1.5 kV input pulse
  • 50 to 70 W output pulses.
  • 2450 to 2720 MHz tuning range.
  • Pins 1 and 2 of the octal base are connected to the heater cold side
  • pins 7 and 8 to the heather, cathode side.
Information source Taschenbuch zum Röhren-Codex 1948/49   
Tube Lore (I)   
QK60: Private collection
Emilio Ciardiello

More ...
Emilio Ciardiello


from Just Qvigstad

You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]