Indicator-controller on the thyratron. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Indicators, detectors, metal detectors
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Specialists in the maintenance and repair of industrial electrical installations will appreciate, I think, a convenient small-sized probe-"controller" for 220/380 V.
The indicator here is not neon, but the MTX-90 thyratron. And as a body, a transparent (plastic or glass) medicine vial of suitable size is adapted. Moreover, if the material of such a "case" is glass, then to protect its integrity (for example, in case of an accidental fall), I recommend wrapping the probe in two or three places with electrical tape (in the form of shock-absorbing rings). Well, a polyvinyl chloride tube is put on the probes.
Appearance of a small-sized probe - "control": 1 - body (transparent medicine bottle), 2 - shock-absorbing rings made of electrical tape, 3 - plug, 4 - flexible wire in insulation (2 pcs.), 5 - probe "0" , 6 - "phase" probe, 7 - probe tip (made of thick tinned copper wire, 2 pcs.), 8 - sensor plate.
Schematic diagram of the device
The choice of cathode and grid resistors is not too critical and can, respectively, be 120 K ... 150 K and 4 M ... 10 M.
Having collected the probe, make sure that it works. To do this, connect the probe "phase" to the same wire of the mains. Then, touching the sensor plate, make sure that the thyratron glows. The phase output is marked with a ballpoint pen.
Author: O.Zushlyapin, Mariupol, Donetsk region.
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