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Cecil Moore wrote in
: Andre & Sharon Walker wrote: I was hoping to get away from traps, but i dont think its possible :-(. I only have a smallish yard, with just 30m from the chimmny (brick ) to the back of the yard, so i think a decent wire antenna is out...but i am open to suggestions. I guess the other considerstion is to keep "she inside" happy . A 1/2WL dipole is 20m on 40m and can be made to work on all HF bands 40m-10m. That's probably what I would do and then do something romantic to keep the XYL happy. Cecil, Andre will not have access to most HF bands, just 80, 40, 15, and 10m. It takes about 6 hours to train and assess a Foundation Licencee, so your tunerless concept is perhaps more complex than Andre's current knowledge base. For example, I worked a FL chap a couple of days ago on 40m with a 80m half wave dipole fed with a long run of coax, and he was confident that his antenna worked real well, despite my expectation that it was likely that well less than 10% of his permitted 10W PEP was radiated. It was impossible to tell this chap that if he cut the dipole to half the length it would work better on 40m. It is no good telling people that an antenna isn't likely to work real good, they will cite all the contacts that they have had with it, and as we know, anything "works", doesn't it. However, most people listen to the positive suggestion that with change, and antenna will work better (and in the above case, more than 10 times the EIRP). Andre, keep it simple. A coax fed half wave dipole is easy to get going will limited knowledge and experience, and you should have a high confidence that you will be able to deliver a suitable load to your transmitter (ie it will deliver its rated power), and the antenna will be quite efficient (ie that most of your 10W PEP transmitter power is radiated). It will also work well on receive. If you hear strong FL signals around, they have good antennas, and / or are flaunting the power limit. It is easy to do the latter, but if you get the antenna right, you still have the room for improvement when you upgrade to the higher power limit. Owen |
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