Large heatsinks 11" wide x 5.5" long x 3 3/4" deep

This large heatsink can be used for four of our circuit boards that have 8 circuits each. Additional room (over 1") would be available on either side of the boards for additional sinking or surface area. Blades are 0.19" thick with 0.63 air gaps. Our circuit boards with the MJL21194 transistors do not need heatsinking if you are pushing 0.5 Amps each transistor. The L bracket heat sinks that come with the boards are fine to use up to 1 Amp each transistor. But if you want to push higher Amps then this sink is recommended. This sink will also be used with our boards with Mosfets in the future. These are 2500W devices and will fit in the same hole patters as used with our present boards. Drilling and tapping service also an option above for additional cost. That would be for 4 boards or 32 circuits. Circuit boards also available assembled or unassembled.