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Z63

Sensibly equivalent to:
6J7G KTZ63
    
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The Z63 amplifier pentode was designed as a low noise audio pre-amplifier and was first seen at the Radio Show in 1937. The KTZ63 is identical.
The inner coating on the glass masks the electrodes. Here the connections emerging from the pinch can be seen together with heater wire and its insulation.
The Marconi brand of M-OV was usually reserved for professional valve types. Osram being the domestic brand.
The wide glass tube envelope is 29 mm in diameter and, excluding the IO base pins, is 98 mm tall.
References: Datasheet & 1040. Type Z63 was first introduced in 1937.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
tc
m
h
a
g2
g3
-
h
k
g1

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
6.3
0.3
250
100
-2
1.0
0.25
1.5M
1.23
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated November 26, 2012.
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