Скачать или смотреть Making a 4, 8 and 16 ohm selectable dummy load

What better way to spend a late night than making a quick and easy project. Watch over my shoulder as I make a selectable dummy load used for testing amplifiers and other pieces of equipment. A reasonably quick and easy project only involving a handful of components and some point to point wiring.

Something I don't cover much in the video is the power handling of the finished dummy load. It's certainly not going to be massively high power but will be enough for most lower output amps and could be used at higher powers for short lengths of time. Even though in the 8 and 16 ohm positions the theoretical power handling capacity is 50w actually it will be limited by the switch. Going from the datasheet I think the switch can probably handle about 35w meaning that the final power ratings will be something like this:

4 ohm, 25w
8 ohm, 35w
16 ohm, 35w

Also apologies for the flicker - it wasn't obvious until after it was all filmed, doh! Exposure will be locked next time...