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5B/250A

Sensibly equivalent to:
807 ATS25A CV124 CV1060 CV1364 QV05-25 VT60A VT60
See also:
Beam Tetrodes and the 807 - CV1060 short entry
    
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The 5B/250A is an 807 with a ceramic base cap for added moisture resistance and a maximum anode voltage of 600 Volts compared to the 400 Volt anode maximum for the original 807.
The parameters given are for single ended use. When used in a class AB1 as a push pull pair with 600 volts on the anode an output power of 65 Watts was normal.
The 5B/250A Type designation is of the STC name style and Brimar is the consumer brand of STC.
The classic envelope has a maximum diameter of 51 mm and a length, excluding the UX5 base pins, to the tip of the top cap of 128 mm.
References: Datasheet & 1040.

 

Pin Connections
UX5
1
2
3
4
5
tc
h
g2
g1
k
h
a

 

Absolute Maximum Operating Conditions
Beam Tetrode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
Pout
6.3
0.9
600
300
-14
83
8
20k
6.0
6.7W

 

Absolute Maximum Operating Conditions
Beam Tetrode
Vh
Ah
Va
Vs
Vg
mAa
mAs
mAg
Pdriv
Pdiss
Pout
freq
f.max
6.3
0.9
600
250
-45
100
7
3.5
0.2W
25W
40W
60
125
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated July 20, 2017.
shape:classic construction:pinch type:beam.tetrode age:1940.1950 base:ux5 heater:6.3v pins:5 pin:1.h pin:2.g2 pin:3.g1 pin:4.k pin:5.h pin:tc.a
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