The CT-15+ is an audio output triode with a 2.0 V filament. The anode voltage range is 60-120 Volts.It was in 1926 that Cleartron introduced their plus range of audio output valves.![](../pics/aaj0285a.jpg)
The silvering of the envelope obscures the electrodes. Etched into the glass is the Type designation CT15+ with the plus looking like an X, the CT logo and 2 Volts.The balloon envelope is 40 mm in diameter, and excluding the B4 base pins is 98 mm tall.References: 1003 & 1043. Type CT-15+ was first introduced in 1926. See also 1926 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | ![](../static/key.gif) a | g1 | f | f |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vg | mAa | ra | gm | ![](../static/key.gif)
| 2.0 | 0.3 | 120 | -4.5 | - | 5,000 | 0.7 |
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Updated May 16, 2019.
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