I have a second-hand Radio Shack VU-75XR about 20 feet up.
HERE is my report. I first tried it at 15 feet and barely received WCHS and WOWK. I added 10 feet of mast and lost those 2 completely. I lowered it to 20 ft. and still no joy. I'm using an RCA matching transformer. Could that could be hurting a little? If it proves impossible to receive WCHS, is there a way to optimize the VHF portion for one channel? WOWK is VHF 13.