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50C5

Sensibly equivalent to:
CV1959 HL92
    
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The 50C5 is an American audio output beam tetrode. It wass designed for operation with anode voltages of 110 Volts and would be found in broadcast radio receivers with series heater chains.
Rather than dropper resistors in the cabinet the USA market tended to use 'line cord'. Line cord had resistance wire built into the mains cable. In use the cable became quite warm - disconcerting!
With an anode load of 2,500 Ohms it would deliver in a single ended configuration 1.9 Watts at 9 % distortion.
The oval anode seen from the end.
The two wire grids and flat cathode. The heater has twelve loops running through the cathode tube.
The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 58 mm tall.
References: Datasheet & 1040.

 

Pin Connections
B7G
1
2
3
4
5
6
7
k
g1
h
h
g1
g2
a

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
Pout
D
50.0
0.15
110
110
-7.5
49
4.0
10,000
7.5
1.9
9%
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 12, 2017.
shape:thin.glass.tube construction:all.glass type:beam.tetrode age:1950.1960 base:b7g heater:150ma pins:7 pin:1.k pin:2.g1 pin:3.h pin:4.h pin:5.g1 pin:6.g2 pin:7.a
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