Hello Brian, I meant to write that 50 feet of coax would have _NO_ more than 6 db of loss with a dipole off of resonance. A multiband (ie. trapped) antenna design will work fine (with coax) if designed and built properly. But a dipole with ladderline is a lot simpler and matched and mismatched loss totals about .6 dB on any band (for 100 feet of ladder line), which is a lot simpler. I do not consider a non-resonant wire dipole poorly designed (or a loop like Dave has also suggested). There is very little loss with it. The antenna portion works very well. Its the feedline (transmission line) that can be the problem and usually causes almost all the loss.
Conversely I have had my share of problems with the adjustment of expensive commercial "multi-band" antennas designed for 50 Ohm coax. Steve, W2MY ------------------------------------------------------- Steve, With all due respect, the problem isn't with the coax, it is with the antenna which is designed poorly for the frequencies of operation. Even traps in a decent multiband antenna design, fed with coax, wouldn't have a 6db loss of the ladder line you're claiming is OK.. 73 de Brian/K3KO _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
