A Short Guide to Vintage Traynor Amps | 220v Contactor Relay

The theory side of PCB creepage clearnesses is useless because it assumes that there is one constant voltage that the circuit will run at when in reality it’s an over voltage event that usually causes failure, but here are the basics anyway.

Once you have the outlet, a level two fast charger is as little as $150 for 16 Amp, which gives 3.5 kilowatts, or $300 for 30 Amps, 7 kilowatts.

Yes, I have seen that sometimes (floating oscilloscope) but I always thought the good way would be to power the DUT through the isolation transformer and leave the oscilloscope safely earthed. Of course you sometimes need a bigger iso. transformer this way.

You did reply to the Gurubuckaroo comment, just a few interjections managed to find their way in first. Does mess up smartarsed replies occasionally, shame when it’s a particularly funny one. On busy articles, I often find posts popping up between pressing “reply” and “post comment”.

Andrew, here in the Land Up Over, Most residential power is single phase, A step down center tap transformer (pole pig) puts out 240 VAC from end to end and 120 VAC with respect to the Neutral (ground) center tap. Therefore the two phases are 180 degrees out of phase. These 3 wires are fed to the fuse box/breaker panel in the house. One hot goes down one side of the row of breakers and the other hot goes down the other side. Neutral is common, Ground is also in there, but whether it is connected to Neutral inside the Breaker Panel or outside may differ according to local regulations.

Thanks to its smaller body, and especially their reduced height due to the lack of a pentaprism or pentamirror assembly, the Sony A33 looks rather aggressive, with the popup flash housing hunched low over the top of the lens barrel. A soft, rubber pad surrounds most of the handgrip, and wraps around to the rear of the camera to cover a small, contoured thumb grip area as well.

My situation is a good example. I just purchased a new house and unfortunately it does not have a garage. Until I get the garage built in the Spring with a NEMA 14-50 outlet, I’m going to rough it with L1 at 120V/15A.

I think *local* distribution of DC makes some sense. We have too many wall warts in our houses. Standardized 12 volt DC power with a whole-house supply would be far more efficient. Of course, it’s not going to be commonplace in even my children’s lifetime, but…

You can also see the top of the mechanism for the tilt / swivel LCD panel, peeking out on either side of the electronic viewfinder. The viewfinder itself projects quite a bit from the rear of the camera, a decision that was apparently necessitated by the tight packaging of components in front, including the AF module, popup flash, hot shoe, and microphones.

Voltage TransientsVaristors feature high durability, which is essential for withstanding repeated high-peak pulse currents and high-energy surge transients. They also offer a wide voltage range, high energy absorption, and fast response to voltage transients. Peak current ratings range from 20 to 70,000 A, while peak energy ratings range from 0.01 to 10, 000 J.

It’s just sensible to avoid risks where you can. If it doesn’t cost much extra, why not bother? Tinkering with a 3D printer is likely to take concentration away from other areas. Low voltage is intrinsically safe from electrocution. Don’t make things dangerous for yourself.

Considering the existence of deep subzero freezers, it would still perform better than a resistive element. Or have it draw the heat from the indoors and run some crypto miners to make up for it.