hi all, In LINKS on this board is a link to:
http://www.dallas.net/~jvpoll/dup6m/dup6m.html Here are plans and permance data on a 6 meter duplexer built with 1-5/8" helix feedline. It is also as much an ad for purchasing the duplexer as the plans. Know some have used 7/8". Often the problem encounted with helix duplexers is the split used. At 1 MHz or more there have been reports of success. However, at lower splits like 0.5 MHz they do not perform. Not sure about the 1-5/8 model. Of course one can still buy duplexers for 6 meters at about $2000 new. Lots of expensive metal in these critters. Just for future reference. 73, ron, n9ee/r
