Phase indicator (CB8295E)

Found in 1980s documentation, this circuit indicates the phase of a three-phase signal from the power grid. The neon lamp is common.

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Transistor Gain Test (CB12265E)
We found this circuit in an English publication from 1980, but it can be assembled with BC548...
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The circuit shown in the figure can generate signals of good intensity up to a frequency of 30...
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