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CV1979

Sensibly equivalent to:
61BT
    
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The CV1979 is identical to the commercial Cossor 61BT. The 61BT is a beam tetrode for television line scan output. This valve would have been used in post war monochrome VHF television receivers.
The cathode bias resistor would have been of the order of 470 Ohms and the positive surge on the anode could reach 5,000 Volts. The anode dissipation was limited to 8 Watts and the screen to 1.75 Watts.
The rounded ends of the anode. The control grid can be seen to be wound on copper supports.
The classic envelope is 32 mm in diameter and, excluding the IO base pins, is 89 mm tall.
Reference: 1040.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
tc
-
h
-
g2
g1
-
h
k
a

 

Absolute Maximum Operating Conditions
Beam Tetrode
Vh
Ah
Va
Vs
Vg
6.3
0.7
200
200
-1
Updated October 24, 2016.
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