> Can someone recommend a portable push up pole that I can use for the > center > insulator and then come down in an inverted V Thanks Phil
I have an interest in a well-designed telescoping pole as well, preferably 20-25 ft on a stable tripod. In thinking this through for a while, I've also decided on an inverted "V" for field use. The Vee will be fed with 300-ohm ladder line and line length will be adjusted pursuant to W5DXP's data to present a near 1:1 VSWR on all bands from 40m-10m http://www.w5dxp.com/notuner.htm In doing so, I've decided to prepare pre-cut line lengths with banana plug connections in lengths of 16', 8', 4', 2', and 1'. Changing line length does not change the 300-ohm VSWR, but it radically affects the end-of-line Z and the 50-ohm VSWR. And so, by manipulating these five plug-in line sections, a near 1:1 50-ohm VSWR is possible without a tuner and system losses are minimized. A 1:1 current balun will form the transition between the switched ladder line sections and coax. I thought about using the Budidipole system or one of its variants, and finally decided that I could attain better 40m-10m efficiency in the field by (1) changing line length; and (2) using a trap-less half-wave antenna length on the lowest frequency -- and make simple "plug-in" changes on the ground rather than by changing taps up on a telescoping mast. Moreover, since there's a need to tether a 20-25 ft. telescoping mast anyway, it makes sense to use the Vee as two of the three guys. Paul, W9AC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
