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B65

Sensibly equivalent to:
13D2 6SN7GT CV1988 ECC32 VT-231
See also:
B65 Advert, December 1948 - Valves for Williamson Amplifier, 1950 - The Williamson Amplifier
    
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The B65 is an audio double triode with a 6.3 Volt heater. The B36 is the same valve except for the 12.6 volt heater.
We also have the Experimental valve E1606 which is possibly the prototype of the B65.
The Osram paper label.
The wide glass tube envelope is 28 mm in diameter, and excluding the IO base pins, is 71 mm tall.
References: Datasheet & 1040. Type B65 was first introduced in 1948.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
g1(2)
a(2)
k(2)
g1(1)
a(1)
k(1)
h
h

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
6.3
0.8
250
-0
3
7.7k
1.6
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated October 14, 2015.
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