Calculating SWR with RF directional couplers

02660:
I have a Wavenode HF-1
http://www.wavenode.com/minidin.htm

I was looking at using a Bird dual element line section but I thought the HF-1 used the AD8307, but no.

Do you have any info on the meter you made?

Well I built it based on a typical circuit application shown in fig 32 in the datasheet.

It was a very easy chip to work with, still available in a 8 pin DIP package. Trade-off is that is was around a $15 chip when I built it around 7 years ago. It takes a lot of complexity and difficulty of realizing accurate RF measurements out of the builders hands and puts it into a chip, highly recommended.

Lefty