No store-bought, appliance, CB-ish Radio Shack SWR meters for the OM who built the SWR sensor on the right. No! He rolled his own center conductor and pick-up loops. Dennis Klipa and I have been exploring the theory behind SWR meters, so when I saw this thing, I immediately went for it. I picked it up at the Manassas Hamfest. I kick myself for not asking the seller for the story behind this project. If anyone has any ideas on how/why/who built this thing, please let me know. The seller was tailgating close to the stables at Manassas on June 19, 2016.