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X65

Sensibly equivalent to:
CV1193 CV3826 ECH35 NR82 OM10 VR99 X147 X61M Z61M
See also:
Osram X65 Advert - Osram X65 Box - X65 Instruction Sheet
    
Extras ▼

 

The X65 is a triode hexode frequency changer for receiver applications. The X65 is the commercial version of the RAF pre-WWII VR99. The X66 is a selected X65 and also given the CV number of CV1099.
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 in via the top cap, thus maintaining the greatest separation between grid and anode circuits.
The Osram paper label. The other side has the etched M-OV lozenge with the Type designation within.
The in-line tops of the circular grids. G2 and g4 are bridged together. There is a fifth wire grid that has an open helical form just like a suppressor grid but the only electrode not seen is the triode anode.
The classic envelope is 38 mm in diameter and, excluding the IO base pins, is 99 mm tall.
References: Datasheet & 1040. Type X65 was first introduced in 1937.

 

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 January 28, 2017.
shape:classic construction:pinch type:triode.hexode age:1930.1940 base:io heater:6.3v pins:8 pin:1.m pin:2.h pin:3.a pin:4.g2.g4 pin:5.g1(t).g3 pin:6.a(t) pin:7.h pin:8.k pin:tc.g1
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