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EXTECH INSTRUMENTS ET20 NEON OUTLET TESTER 120/240V

EXTECH INSTRUMENTS ET20 NEON OUTLET TESTER 120/240V

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this tester I found in the junkyard. If it is connected to 240V, both indicators come on. If it is connected to 120V only the 120V indicator lights. This leads me to believe that the circuitry inside is simply a pair of large value resistors. The 240 lamp probably has a resistor of super large resistance to keep it from striking on 120v and the 120v lamp has a resistor of a lower value to make it light on 120v but also not blow up on 240.

PSX_20200125_053453.jpg PSX_20200124_160512.jpg PSX_20200116_034213.jpg VEnGSjSU7drNS1Extx.gif

Light Information

Light Information

Manufacturer:EXTECH INSTRUMENTS
Model Reference:ET20
Lamp
Lamp Type:Neon (NE)
Filament/Radiator Type:Low Pressure Neon Discharge
Physical/Production
Application/Use:Outlet tester

File information

File information

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Filename:PSX_20200116_034213.jpg
Album name:HomeBrewLamps / VFD, EL & GAS DISCHARGE
Keywords:Lamps
File Size:528 KB
Date added:Jan 16, 2020
Dimensions:1822 x 2464 pixels
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rjluna2
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Robert


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Jan 16, 2020 at 06:51 AM Author: rjluna2
An interesting find

Pretty, please no more Chinese failure.

Bottled lightning
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Jan 17, 2020 at 03:43 AM Author: Bottled lightning
That would make both lamps light at the same time only one would be brighter than the other, they are probably in series with a resistor across one and another resistor in series with both.
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