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KT76

 
    
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The KT76 is an early post war audio beam tetrode designed for universal mains receivers. The heater current is 160 mA which is unusual.
The operating conditions state a 300 Ω cathode resistor and an anode load of 5,000 Ω for an output of up to 2 Watts with 4.5% distortion.
The Osram paper label to brand this M-OV valve.
The inside of the envelope is coated and this obscures the electrodes. At the dome the U shaped control grid cooling fin can be seen.
The wide glass tube envelope is 29 mm in diameter, and excluding the IO base pins is 79 mm tall.
References: 1040 & 1043. Type KT76 was first introduced in 1948.

 

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

 

Absolute Maximum Operating Conditions
Beam Tetrode
Vh
Ah
Va
Vs
Vg
mAa
mAs
gm
15.0
0.16
175
175
-12.5
35.0
6.0
2.5
Updated March 12, 2014.
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