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X65

Sensibly equivalent to:
CV1193 CV3826 ECH35 NR82 OM10 VR99 X147 X61M X61M
See also:
X65 Instruction Sheet
    
Extras ▼

 

The X65 is a triode hexode frequency changer for receiver applications.
The triode was designed for local oscillator use and an injection voltage of 10 V peak to peak was produced. The hexode mixer took the signal into the top cap grid, thus maintaining the greatest separation between grid and anode circuits.
The Marconi brand label - here the Marconiphone company - the domestic broadcast equipment arm of Marconi.
The classic envelope is 38 mm in diameter and, excluding the IO base pins, is 100 mm tall.
References: Data-sheet & 1040. Type X65 was first introduced in 1937. See also 1937 adverts.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
tc
m
h
a
g2,g4
g1(t),g3
a(t)
h
k
g1

 

Absolute Maximum Operating Conditions
Hexode
Vh
Ah
Va
Vs
Vg
mAa
ra
gm
6.3
0.3
250
100
-3
1.75
2.5M
0.225

 

Absolute Maximum Operating Conditions
Triode
Va
mAa
100
4.75
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated March 03, 2022.
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