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HL1320

Sensibly equivalent to:
4D1 AR7 C30B CV1000 CV1109 CV3502 DA HL13C NR55 VR109 VT100B
    
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The HL1320 is triode for use on AC or DC mains and thus for use with a series heater chain. The HL1320 was designed for use as a detector or first audio voltage amplifier.
In this exhibit the zinc paint has started to corrode.
The reverse of the envelope is plain metal paint.
The classic envelope is 42 mm in diameter, and excluding the B7 base pins is 103 mm tall.
References: Datasheet, 1040 & 1043. Type HL1320 was first introduced in 1934.

 

Pin Connections
B7
1
2
3
4
5
6
7
tc
m
-
-
h
h
k
a
g1

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
μ
13.0
0.2
250
-3.3
6.0
10,000
3.0
30
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated March 12, 2014.
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