I have been interested in QRP transceivers for quite a long time but, just built my first rig in the last couple of years. I have not been on the air for a long time but wanted to get my code speed back up so I could transmit with this new QRP rig. I was thinking of taking it with me when I went camping and backpacking. I have also built a portable dipole antenna. In doing all of this I had know way of reading SWR to tune my ant. So I started looking for SWR meters to build that would be able to read in the milli watt range. I came across an article from Roy Lewalen W7EL. He had designed and built an QRP SWR meter. It was featured in the 1994 "Radio Amateur's Handbook", pages 34-6 through 34-9. Here is a picture of the schematic: swrschem.jpg
I have a good friend of mine N0SS that help me start building my own printed circuit boards. He laid out the circuit board in CorelDraw. Here is a picture of the layout:
Here is a couple of pictures of the finished populated boards:
I also had N0SS layout a new meter face for the 1 milli amp meter to reflect power and SWR:
Here is a couple of pictures of the finished project. I also use printed circuit board to build the case. The meter seems to be very accurate.