Herb, The MFJ-1025/1026 is a great unit, but as Tom Rauch notes on http://www.w8ji.com/mfj-1025_1026.htm, it does not cover the full 360 degree phase range as it ought to. He explains how to fix that at the bottom of that page. I added a relay controlled by a front panel toggle switch to my MFJ-1025. It swaps the inputs. 73, Mike www.w0btu.com