This time I'm just building a high-power dummy load, preferably one that doesn't involve any water. But just like for an amp, really good heat sinks are expensive.
I'm seriously considering stock aluminum plate and stock C-channel. I have cans of heat-transfer loaded epoxy. I might even be able to find cheaper used materials for scrap recycle prices. Some tall sections of heavy-wall extruded square aluminum should make nice chimneys. I'm definitely going to find a local scrap yard to walk thru.
Point is, heat-sink extrusions are nice but often seem overpriced to me.
I'm seriously considering stock aluminum plate and stock C-channel. I have cans of heat-transfer loaded epoxy. I might even be able to find cheaper used materials for scrap recycle prices. Some tall sections of heavy-wall extruded square aluminum should make nice chimneys. I'm definitely going to find a local scrap yard to walk thru.
Point is, heat-sink extrusions are nice but often seem overpriced to me.
Unless you use it on a regular basis, a bucket and a cheap resistor is the way to go.
If you have more money than Bill Gates, buy a bunch of Dale 250W resistors and bolt them to 20" x 6" wide 0.125" AL plates (with grease) and run a window fan on them, that's in the plans from Crown for their recommended warranty test set-up.
If you have more money than Bill Gates, buy a bunch of Dale 250W resistors and bolt them to 20" x 6" wide 0.125" AL plates (with grease) and run a window fan on them, that's in the plans from Crown for their recommended warranty test set-up.
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