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CV238

Sensibly equivalent to:
KR6/3
    
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The CV238 klystron is an S Band device and operates in the frequency range 2.93 - 3.13 GHz. The CV238 specification was based on the KR6/3. It was developed from earlier devices for airborne Radar use. The resonator, (like anode) operates at 250 Volts. The top cap is the reflector and this would have typically minus 100 - 175 Volts on it. As the reflector voltage is altered over the range a series of peaks in output power would be seen. The strongest would be chosen for use. The electrical tuning range is 20 MHz and was required to hold the tube on frequency as temperature etc. altered. All klystrons are very frequency sensitive to temperature changes, as the cavity and drift space will expand or contract with temperature changes.
Three variants were made differing in frequency coverage. These were the CV116, CV238 and CV272. They replaced the range CV35, CV36 and CV67 all requiring a much higher resonater voltage.
The CV238 seen from the opposite side.
The thin glass tube envelope is 17 mm in diameter and, excluding the IO base pins, is 85 mm tall. The encircling cavity is 46 mm in diameter and 14 mm thick.
References: Datasheet, Private communication & 3002. Type CV238 was first introduced in 1944.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
tc
g1
h
-
Res
-
-
h
k
Ref

 

Absolute Maximum Operating Conditions
Microwave Valves
Vh
Ah
4.0
1.5
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated November 04, 2014.
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