Trying to calibrate The vacuum tube voltmeter but instead all I did was trip the breaker upstairs. Looked at what was going on inside the voltmeter and then look at the schematic and realize that somebody had put on a three prong plug and grounded attached the ground wire to the chassis. The problem is the ground wire is now grounded to the negative side of the AC they seem full line was just tripped the breaker. In the original circuit the AC line only hooks to the transformer in the problem with the chassis is the chassis is actually the AC ground or the negative AC not just ground. I’ll have to talk to some folks about this.

Actually what happened was as soon as I touched the negative ground wire of the test probe into the AC socket it tripped the circuit breaker. I realized

I’m going to have to build myself a dim bulb tester so that I wouldn’t won’t do this again Brian had even mentioned that possibly a ground fault interrupt her might be is good as well or maybe in conjunction with it I’m not sure if I use the damn bowl with a ground fault interrupter outlet if that would work, possibly.

During the day I purchased an older model night TK or KT6 70 off of eBay for 25 bucks +15 or so dollars shipping. It ended up shipping this evening or at least being said it was shipped. I’m not sure if it’s actually going to be working when I get it.

At home I finally decided to go ahead and purchase a second night KT 670 capacitor tester it was a little newer, has a nicer front panel and hopefully I can get parts from both of them in order to get at least one complete or maybe I can fix them both. I did find a website that had directions and calibrating capacitors for many capacitor testers.

HERE is a site that talks about these testers with help on calibration and repair.