Been reading a little about power transistors. This is a power board that I believe came out of a battery backup I scrapped. It had 4 solid aluminum heat sinks and there were two power transistors bolted to each heat sink. These power boards usually have either 1 large heat sink or 3 or 4 smaller ones plus several transformers and some large capacitors. Without removing anything I get 20 cents a pound for these heavy boards but if I remove the heat sinks, transformers and large capacitors I get $1.20 a pound. I don't remove any transistors, IC chips or flatpacks because it can devalue the boards.
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