I own 2 of these meters. They are the LP-100 Digital vector wattmeters by N8LP. I was an early adopter, having built my first meter in 2006 when they first came out. My serial number is in the low 100's. I was so happy with this meter I bought a second one a few months later, as I routinely run 2 "stations" simultaneously, one for ragchewing and one so that I can chase DX while I am ragchewing. That means 2 amps and 2 sets of antennas so I wanted 2 meters in the line.
These meters are calibrated with a know traceable NIST source and are accurate to within about 2% or better across the range from 50 mW to 3000W They also measure phase and resistance as well as SWR and can be used as a highly accurate field strength meter.
These meters have performed flawlessly for that past 3 years, EXCEPT they had a PLED display and PLED displays have a problem, they wear out if you leave them on. Larry N8LP solved this by upgrading the LP_100 to the LP-100A. Most manufacturers would just let you eat the obsolescence. You would get the "sorry we don't carry that part anymore" routine. Larry OTOH designed a conversion kit to renew the LP-100 and convert it to a fully functional LP-100A. This is the delight of software defined products that you can easily extend their lives to match current production products
The upgrade consisted of installing a daughter card which contains the original micro-controller a driver for the new display and the new display
There are several options of assembly from a kit format to sending the unit back to Larry for factory intallation. I chose the kit route. Assembly and installation was trivial. I installed the new components and uploaded the firmware and I was back on the air with a pretty new robin's egg blue display!!
The latest version of this meter includes a dual coupler option which allows 2 signal paths to be displayed on one meter Larry has a vast array of accessories for various ham radio products as well as his spiffy watt meters. The watt meter is a virtual transmitting VNA capable of sweeping antennas for SWR and impedance information using a radio like the F5K which can become a software controlled freq generator. It also can be used to plot antenna pattern information using a radio like the F5K Check out the LP-100 and Larry's other brainy creations at http://www.telepostinc.com/
If you're interested in writing something interesting for this blog regarding your SDR experience let me know. I would like to include things like how your SDR contest station is set up, or your VHF station that uses SDR as the system center, feats of weak signal work or how well the SDR works in various challenging situations. If you are a foreign ham and would like to comment on the growth of SDR in your particular part of the world. Bring it on!
I reserve the right to publish or not, but I'm pretty open to documenting a wide variety of honest experiences from users, for readers to explore. The understanding of SDR in our hobby is so nascent, that I want the reader to be able to see the value of SDR through the eyes of YOUR experience and enthusiasm.