I was looking for dummy load on ebay for HF testing. All dummy loads were too expensive. Then I found bag of thick film resistors. Unfortunately they were 820 ohm, which is not optimal for 50 ohm load, but close enough. Then I constructed two PCBs.
The construction is simple…
At the end I would like to put everything into oil bath to make it more suitable for high power testing.
The small SMA connectior is for measuring via the 1:10 voltage divider.
Here’s altium PCB for the two boards: dummyload (31.10.2014 21-23-06)