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N148

Sensibly equivalent to:
7C5
    
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The N148 is an audio output beam tetrode. The figures given are for single ended use with an anode load of 8,500 Ohms.
The wide glass tube envelope is 28 mm in diameter and, excluding the B8B base pins, is 65 mm tall.
References: Datasheet & 1040. Type N148 was first introduced in 1950.

 

Pin Connections
B8B
1
2
3
4
5
6
7
8
h
a
g2
-
-
g1
k,bp
h

 

Absolute Maximum Operating Conditions
Beam Tetrode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
Pout
D
6.3
0.45
315
225
-13.0
35.0
6.0
77,000
3.75
5.5
12%
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 13, 2013.
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