The multicoupler is just an Electroline cable tv drop amp with a 4 port splitter on each of the 4 outputs. As for 3-50, my favorite is the home made ground plane suspended from a tree out back. It's made of 4 8ft aluminum angle pieces for ground plane elements and a regular stainless center whip. A wire crimp eyelet crimped to the whip make for a hoop to attached the string it's suspended from. It works better than anything else I've used.Nice mancow, the room lights must dim when you turn on your power supply. Clean simple set up. I could only imagine your multi coupler or antenna farm on the roof. What is your favorite antenna for 30-50 MHz ?