This is a 6-1/2 by 6 by 1/8th inch thick copper heat spreader. It weighs 1 pound 9 ounces.

I have matching boards and heatsinks. I designed the ALS600 in the late 1980s as a Heathkit amplifier but Heathkit went out of the amateur business so they abandoned the project. Ameritron picked this up and it was put in production in the early 1990s when MFJ bought Ameritron.

Because MFJ could not handle copper properly, they reverted to a thick backbone heatsink and abandoned the copper in all but the early ALS600 design.

The hole pattern fits case styles like MRF150 and 2SC2879 transistors use, or you can solder an LDMOS.

These are either unused new or new module pulls. I also will be listing tested complete modules as time permits. This is ONLY the heat spreader, although I have matching unpopulated boards and heatsinks.