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In article . com,
"Jeroen" wrote: Who is Kr1sts? How did you build it? http://www.kr1st.com/swlloop.htm Mostly according to this article. It was really easy to build. Hardest was to find a proper capacitor wich I eventually found in my girlfriends alarmclock (lol). I'm going to skip the amplifier, after some research I learned that it'll only amplify the whole sound, and adda bit of noise to it as well, so it won't do me much good. Instead I'm going to build another loop, geared towards the 60 meter in specific. It will be a multiple turn loop made of a 1/10 wavelenght copper tube. More information can be found he http://home.datacomm.ch/hb9abx/loop80m-e.htm I'll start by using the capacitor they advise there, a 10-125pF so 3.9 to 10 MHz will be covered, including my fav. the 60 meters and an amateurband I regurarly listen to. I'm really enthousiastic in magn.loops after this first experiment, and might have a AN-1 for sale in a not too long time from now. I heard (on this newsgroup) one fetched 200$ a week or so ago on eBay?!? That'll be great and allows me to build 4 more magnetic loops! ![]() The first link is a manually tuned loop and the second is a motorized version of the same. A tuned loop will be quieter than a broadband loop design I posted earlier. The drawback with the tuned loop is you have to tune it along with the radio complicating the operation of tuning in a station. Looking at the first link I think the design would work better if there was more separation between the pickup loop and the tuned loop. I would attach the pickup loop on the other side of the PVC pipe. The second suggestion is to use a series 50 ohm resistor from the coax center conductor to the pickup loop. This may not do much other than sharpen the peak of the tuning response. -- Telamon Ventura, California |
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