The other day I finally built a dim bulb tester.
When I used to work for a TV shop we had one there I used all the time.
A friend brought me a stereo amp that was blowing fuses, and so I finally decided I needed a dim bulb tester of my own.
Normally I was using an isolated variable voltage power supply with built in current protection; but it was not really adaptable in this case.
Going thru the electrical stash in my garage I found a nice control(?) box with no cover, a used wall switch, a used duplex grounding outlet, and an old Bussman screw in fuse box with cover,(The same size as a standard duplex wall outlet plate) and the original NOS fuse in it brand new!
Grabbing the parts I mounted the fuse box onto the control box after removing the metal cover. The old glass fuses are the same size base as a standard light bulb.
Mounted the switch, and bulb on a metal double duplex adaptor plate and the outlet directly to the box. A power cord cut off an old satellite C band receiver and a strain relief from a metal outlet box completed the project, after a coat of paint.
I'll try to post a pix later on when I am more mobile again, after my fall earlier this week.
I tested it out and it worked great- as I expected.
I did measure a few microamps of leakage though, to the metal chassis, which is connected to the ground pin on the power cord. This may be because I do have the chassis ground connected to the metal box its built on. I suspect if I opened the ground, the leakage would go away, but I prefer the safety of having the outlet grounded. It plugs nicely into the Powerite I have too, so if I want, I can vary the input voltage