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30C1

Sensibly equivalent to:
8A8 9A8 LZ319 LZ329 PCF80
See also:
Valves and their Habits - Ediswan First Preference Range Advert
    
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The 30C1 from Mazda is from the era of VHF television in the 1950s and early 1960s. The valve is a triode pentode designed to function as a mixer and oscillator in the tuner. The local oscillator has to generate five Volts peak to peak.
The 30C1 is sensibly equivalent to the PCF80 but slight differences do exist. Mazda made both types.
The triode section.
A genuine UK made valve. Note the screen below the bottom mica.
The relative sizes of the two sections.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins is 46 mm tall.
References: Datasheet & 1040. Type 30C1 was first introduced in 1954.

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
a(t)
g1
g2
h
h
a
k,s,g3
k(t)
g1(t)

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
9
0.3
170
145
-5.5
6.8
2.0
0.8M
2.0

 

Absolute Maximum Operating Conditions
Triode
Va
Vg
mAa
120
-2
6.0
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 13, 2016.
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