I hear what you are saying Guy. Every vertical installation is a unique situation. I dont have enough technical knowledge to determine when my vertical antennas could do without a common mode choke. I plan to continue using a choke on all my verticals to be safe.
73, Bob K6UJ On Oct 20, 2012, at 5:02 PM, Guy Olinger K2AV wrote: > "Just DO the common mode choke on any vertical. Don't tempt Murphy." > > I stand by my comments. > > I find after some interesting conversations that readers of posts > often read as if written to them. So I write my posts as to the > general audience. If an expressed situation is so specific as to be > exceptional to general use, I reply in private. > > *Of course* there will be a few situations where this general purpose > rule won't add any value. The question is whether a specific owner > has the equipment and technical knowledge to identify those > situations, which are highly specific and subject to all kinds of > local influences, and whether one can post a textbook to explain the > choices. > > And while theoretical situations are raised, I continue to this day > finding situation after situation where a vertical needs common mode > blocking to help fix it, and I've not ever once had to tell someone to > REMOVE a common mode choke at a vertical feedpoint. > > I was speaking of vertical feedpoints. Dipoles are another subject. > > 73, Guy. > _______________________________________________ > Remember the PreStew coming on October 20th. http://www.kkn.net/stew for > more info. _______________________________________________ Remember the PreStew coming on October 20th. http://www.kkn.net/stew for more info.
