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Pen383

Sensibly equivalent to:
7D6 C70D CV1456 PP35 Pen3520 Pen36C
See also:
Mazda Pen45 & Pen383 Advert
    
Extras ▼

 

The Pen383 is a beam tetrode audio output valve on a Mazda Octal base that was designed for receivers operating without an isolating mains transformer. The design was released in 1938 with other valves to build superhet receivers. The Pen383 could produce just under three Watts of audio.
Thanks to Derek Taylor for sending these images.
The box has a printed sheet pasted on that gives the basic operating conditions.
The logo and makers name.
The classic envelope is 54 mm in diameter, and excluding the MO base pins is 120 mm tall.
References: datasheet & 1043 Type Pen383 was first introduced in 1938.

 

Pin Connections
MO
1
2
3
4
5
6
7
8
h
k
a
g2
g1
M
-
h

 

Absolute Maximum Operating Conditions
Beam Tetrode
Vh
Ah
Va
Vs
Vg
mAa
mAs
gm
38
0.2
200
200
-8.7
50.0
10.0
12.0
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 28, 2013.
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