Pretty nifty rig! My bad, VR Voltage regulator.. since they often come in the TO220 package
I have a really nice linear slide rule.. about all I can do with it is multiply/divide though.. it's got about 20 darned scales on it for everything from trig, logs, roots, and a bunch of stuff I'm not sure what it isOne more cool tool for the toolbox with long lasting batteries:
and still manufactured by Concise:
and someone even wrote a manual for it:
Thanks, though its been sitting in it's case for 20 years, I suspect it'll sit there for 20 more years.
Good link, I've bookmarked it so I can come back to it in 2050 :P... I'd like to learn it just for curiosities sake
I invite any further comments or suggestions that you may have
If your finger gets into 120 VAC housepower in something you're working on , you won't have a dead short to ground through your wrist. Your clothes and shoes will provide some protection.
View attachment 113298
around eight bucks at Walmart
Simple three light testers cannot detect two potentially serious house wiring errors: (1) neutral and ground reversed at the receptacle. (2) a bootleg ground, where the neutral and ground pins have been connected together at the receptacle. This may be done by someone fitting 3-prong receptacles on a circuit that has no ground wire.
I use the same device
I'd suggest that the cheapie detectors are perhaps the worst of the available choices.
To check ground integrity i make a "poor man's test fixture",
consisting of a 100 watt lightbulb in a lamp socket,
center of socket connected to hot and barrel of socket switchable to either neutral or earthing conductor.
Lightbulb should light with neutral selected to neutral, of course,
and also should light with neutral switched to earthing conductor unless it's on a GFCI circuit.
Voltage measurements between Neutral and Earthing conductor give me a clue as to condition of those two paths.
I've found and fixed a lot of loose connections in old buildings that way.
But that's something you shouldn't try unless you're very familiar with electrical safety.
I really like the procedure that the Shock Zone guy describes for the neon light gadget.