DIY Simple Pi Attenuator

I have recently build a RF power meter, called “Trinity FR Power Meter” from Daniel’  webpage ,  in my case in need to measures often up to +-/30-40 db, so i need to put attenuator between power source and RF power meter to avoid saturation or rf-in stage destruction…

Here some links to calculate easily a Pi attenuator:

http://www.microwaves101.com/encyclopedia/calcattenuator.cfm
http://www.random-science-tools.com/electronics/PI_attenuator.html

I have made two versions, 40 and 50db, put in small rf enclosure box, with two BNC connector RF In/Out:


800x589_40db


800x589_open


full_att