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2151

 
    
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The 2151 from Philco is an indirectly heated audio output pentode for use on series heater chains. The load impedance is given as 5,000Ω and the output power is 5 Watts in a single ended amplifier or up to 12 Watts when used in push-pull.
The control grid is wound on copper supports and has heat radiating fins at the top.
The UX6 base pins.
Thanks to Mark Mallison for sending the images.
The classic envelope is  mm in diameter and, excluding the UX6 base pins, is  mm tall.
Reference: 1043. Type 2151 was first introduced in 1940.

 

Pin Connections
UX6
1
2
3
4
5
6
h
a
g2
g1
k,g3
h

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
14.0
0.3
250
250
-30.0
48
11.6
50k
2.3
Updated October 13, 2019.
shape:classic construction:pinch type:pentode age:1940.1950 base:ux6 heater:300ma pins:6 pin:1.h pin:2.a pin:3.g2 pin:4.g1 pin:5.k.g3 pin:6.h
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