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07.12.202409.03.2025 enthru hamradio amplifiers, hf, measurements, mrfx1k80

Big HF load

It’s based on a copper plate, big old whipped aluminium radiator and two 100Ohm resistors, 800watt each.

That was planned:

But as always I f.cked up drilling and thread cutting, so I decided to place copper plate where I can use nuts if I f.ckup thread. Yeah, it’s kinda stupid build in case of temperature distribution.

And I decided to check it with infrared camera. Looks like it will work fine, at least with the fan.

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