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CT-15

 
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The CT-15 is a general purpose triode with a 2.0 V filament. The anode voltage range is 30-120 Volts. Electrically the CT-15 is identical to the CT-08. The only difference is the filament - CT-08 runs at 3.0 V at 0.08 A.
The silvering of the envelope makes inspecting the electrodes difficult.
A close-up of the cylindrical anode and helical grid. CT-25+ shows a double cylindrical anode.
The balloon envelope is 34 mm in diameter, and excluding the B4 base pins is 91 mm tall.
References: 1003 & 1043. Type CT-15 was first introduced in 1925.

 

Pin Connections
B4
1
2
3
4
a
g1
f
f

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
2.0
0.15
120
-
-
18,000
0.42
Updated January 20, 2013.
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