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![]() wrote in message oups.com... Thanks Cecil, I have some old fiberglass 11m antennas, the kind that has a wire antenna heatshrinked to a fiberglass rod that would be pefect for making this. .................................... You can use one of those for all those bands, just by changing the top "stinger" whip. I use the small hose clamps to hold them, if the stick doesn't have a slide in mounting part on top. IE: if you had a 6 ft CB stick that used a short stinger, you can add length to tune the lower bands. On one of mine, the stinger needed to be about 2 ft longer to tune 20m using the CB stick. So if you had various stingers to clip on, you could work all the bands from 20-10. On those upper HF bands, even the simple CB stick/extended stinger will work quite well. A cb/10m stick using a longer stinger to tune 20m, is more efficient than most 20m sticks using more turns of wire, and a shorter stinger. I have one antenna that I've used for nearly 15 years that was built from a firestick CB antenna. I added a large coil in the middle, and it works all bands 80-10. I change coil taps on the low bands, stinger length on the upper bands. I also have one I made from a 6 ft 20m stick. It's also converted to all band use, and has the performance of a bugcatcher, being it uses a large coil on the lower bands. But...it's as light as a fishing rod n reel... I use a 5 ft stinger, and the normal driving height of the antenna is 11 ft. That antenna is exactly center loaded in the driving mode. If I add a 3 ft mast, it's 14 ft tall, with the coil at the 8 ft level. But I use that when parked. Bit tall for driving... :/ Anyway, you can build a pretty good antenna dirt cheap if you look around. I've never spent more than junk parts and chump change for a mobile antenna. MK I had taken an old CB 6ft antenna, the kind with the wire heatshrinked to the side and put new wire and a loading coil in the middle. Works OK on 10 and 15 SWR is pretty high on 20 and I dont have a way to match it. Experimented with a cane pole for a support and found I could get a reasoable SWR on 20 if the antenna was about 14ft long, a couple more feet and I wouldnt even need the coil. Next plan is to try to use something that folds kind of like fiberglass tent poles and get away from the loading coils all together. They are more of a bother than what they are worth for my application since I dont ham while Im driving. I just wanted something I could store neatly in the back of the truck which would limit eveything to 6Ft or less. Changed my mind about 5 times now on what I want and how to do it, I guess that happens when you are going up the learning curve. |
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