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30L1


Valve Donation by Peter Bates (GM4BYF)
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Sensibly equivalent to:- 7AN7 - B319 - PCC84
 
See also:
Valves and their Habits - Valves for Bands III, IV & V - PCC84/7AN7
 
This exhibit was last updated on 23 October 2013
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The 30L1 is a double triode developed to meet the needs of VHF band III television transmission in the 1950s.
The 30L1 type of double triode was specifically designed for cascode operation. The normal configuration was for triode one to be operated as a grounded cathode stage directly coupled to triode two connected as a grounded grid stage.
The triode sections are mounted low in the envelope to minimise lead inductance.
The lettering shows a made in England valve.
The thin glass tube envelope is 21 mm in diameter and, excluding the B9A base pins, is 46 mm tall.
References: Datasheet & 1040 Type 30L1 was first introduced in 1954.
 
Pin Connections
B9A
1
2
3
4
5
6
7
8
9
k(2)
g1(2),s
a(2)
h
h
g1(1)
k1-in
k1-out
a(1)
 
Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
7.0
0.3
90
-1.5
12
4000
6

Thanks to Frank Philipse for supplying the above PDF datasheet