Ironically if I hadn't regretfully sold off my OHR WW2 meter some years back, I might never discovered this QRPoMeter, as every QRP'er needs some kind of QRP wattmeter. NM0S did a stellar circuit and case design on this very accurate meter. If you take your time, and follow his instructions in order, and test fit case parts, you should have no trouble whatsoever. I like that it is digital, at QRP levels, and that their is a dummy load/ bridge in the unit that protects any QRP rig from an SWR higher than 2::1. Also everything about this unit can be read and seen without my reading glasses.
I was surprised at how rugged the PC boards are. I won't go into details, but I ended up doing a lot of rework to fix my 2 big errors, and the board survived.
Website says it is a 3 hour kit, and it may be if you have put one together before. I spent 3 hours studying the instructions, schematic, etc. Then the build began, but the thru hole construction made it easy. The dummy load and bridge resistors are surface mount, but are large and easy to work with, even with my tremors. Just follow the instructions.
Complaints? The instructions, schematic, BOM, etc. are supplied on paper. Probably should have a note, "Don't socket U2." The schematic was almost unreadable, but I was able to finally make an acceptable copy. Building the case was a bit confusing until I actually did it (pictures would have helped), but it looks great!
The kit assembled good, and with no issues, except a few missing resistors that David, NM0S, mailed to me. It calibrated easily and works great! I can tune an outdoor wire with a homemade L network tuner easily now, and use it with my transmitter projects..
I learned of the QRPoMeter from a favorable review on eHam.com. I ordered it because the product seemed to fill a need for a compact and relatively rugged instrument for measuring power out and VSWR of my QRP rigs and antennas. Also, I am an avid and experienced builder of electronic kits.
The QRPoMeter went together without a hitch and it looks and works great. It will go with me to the field when I play with my QRP rigs and test portable antennas.
Purchased 5 of these for a tech class. The kits are straight forward and decent until you connect them to an antenna. The stock crystal puts all the ft-8 noise inside the receiver bandwidth. Pretty big let down now that they cant hear w1aw.