tube, for use as an oscillator in the frequency range 4.4 to 4.85GHz.
With a cathode current of 65mA, the minimum output at 4.65GHz is 450mW.
|Nominal heater current
|0 to -200V
|Screen grid voltage
|0 to resonator voltage
|Resonator voltage + 10 to 20V
|Min output power
|Max mean power input
|Max peak current
|6.2 to 6.8cm
In operation the valve is held
in a magnetic field, and the 'probe' above the disc would be inserted
into a tuned cavity.
Also known as V246A/1K.
Two of these were used in the
Wireless Set No. 10 Mk.II (CV79 and CV89
magnetrons were used in the Mk.I version)
CV228 pictured came with a test certificate titled 'Broadcasting stations
- transmitting tube record'. This shows the serial number of this valve
to be LYQ5G and the first test date is 11/2/54, followed by 14/7/74. The
tube is new and presumably never used other than being tested. Unfortunately
because of this, the interesting area of the card ("Tube employed as")