The LED display isn't popping out at you because of the flash picture, but the variac box works as intended. It's reading 100V and 00.0 Amps while the yellow (Horrible Freight) voltmeter reads 102. Which is correct? Is either correct? The digital voltmeter I trust the most isn't pictured, but it was close to midway between the HF meter and the . It turns out that if I tweak the big variac dial until the box's display stops flickering 99 to 100 and back, the trusted DVM says just about 101.
Pretty much all of those are "close enough" for what I expect to be doing with it, which is primarily to reduce the line voltage to some of my older radios and things that haven't been on in a while in order to reduce the risk of something failing because it hasn't been on.
Unlike this project, the antenna is fairly underwhelming and needs a little emphasis. It delivers a bit weaker signal than my vertical when the radio preamp is on (on for the loop, off for the vertical) on the one band I was most concerned about. On the other band, it's much worse than the vertical. On the positive side, though, it delivers some of the claimed ability to null signals off the back.