TekBox TBOH02 - Self Powered Active Load

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Very handy precision-adjustable load

4.0

It's like having a precisely adjustable 25W resistor! A 5W load doesn't warm it much, haven't tried higher. Great for testing onboard power regulator circuits, AC adapters, heat sink temps at various loads, IR losses on PCB power traces, etc. Wish I had one of these long ago. Ordered a lower-cost meter to use for current monitoring, but not sure it's really needed given the 10-turn pot will typically read the current pretty accurately as long as there's at least 2v across the load posts. A diode current-bridge makes it usable for AC. Negatives/Gotchas: * I bought a shorting bar to use on the Ammeter posts to avoid needing a banana cable shunt or ammeter connected but it doesn't work since the metal faces on the posts are recessed in plastic so they don't touch the bar. I would expect a similar problem using bare wire. * On the two sample units I've used there's something about the 10-turn pot that binds once per revolution. The second unit was better than the first but is still stiff to turn with its small knob... an annoyance.

Verified Purchase JIM MOOMAW on Dec 30, 2020 I found this helpful (1)