Link for diy power meter,(AD8318) cheapy build from parts of ebay, BG, alliexpress and case printer with 3d printer. Need calibrate to! Link gifs a lot of info about building and calibrate from all ham Freq til 5.8ghz.
https://www.rc-cam.com/forum/i…ower-vswr-meter-low-cost/
Pdf from CQ-DATV https://cq-datv.mobi/DownloadIt.php?id=57&ver=pdf look at pages 20-29
Hee lekker biertje. 
Please more info over cost of pcb /or with parts and shipping cost
Greetings Reinoud
Good idee, Thanks
Please info of price and cost of shipping.
I bought three of those directional couplers on eBay and they work very well for measuring PA output power.
The coupling value can be selected 10/20/30/40dB. (and some more)
Those directional couplers are sold by many sellers and also on amazon & Co. for a few bucks.
https://www.ebay.de/itm/1stck-…m:mT6rnKMBsPYpjotZjzsa11w
VY73 DB8TF
Also on sale at alliexpress, look out for shipping cost and time of shipping
