These are very good devices (lil pricey), but an issue I found is they do not sell the shack-coax-end 'voltage input/isolation' box/device to power these via coax. Just like I'd like to find a solid low-loss on-mast two-position-coax-switch to be controlled via ~12VDC from the shack coax. Making changing CP or Vet/Horz easy with only one coax feed. I want them for 2m/70cm/1.2G. MFJ has one but it's not rated for >150MHz. Best regards, Dale Kubichek, MS-EET, N6JSX Sidney, OH 45365 EN70vh
http://groups.yahoo.com/group/HAM-SATs http://groups.yahoo.com/group/RDF-USA Message: 2 Date: Sat, 18 Feb 2017 20:34:38 -0500 From: Paul Stoetzer n8hm@arrl.net To: "kb2cwn@yahoo.com" kb2cwn@yahoo.com Cc: "amsat-bb@amsat.org" amsat-bb@amsat.org
Advanced Receiver Research has the most cost effective mast-mounted RF switched preamps.
http://advancedreceiver.com/page10.html
SSB Electronics' line of preamps might be better, but are more expensive.
http://www.ssbusa.com/NEWSSBPREAMPS.html
73, Paul, N8HM