I have an old AEA loop in my garage attic. It functions very effectively. The bandwidth on 20 is no more than 10Khz or less. But signal reports and reception are only slightly lower than my full-size dipoles. When you get the feel for using it you can retune in seconds using just your ear and the noise level from the receiver. With reasonable conditions ( as in a little better than things are now) I've made 100's of Q's worldwide with 100 watts.
I also use a pair of Ham Sticks with the MFJ adapter to make a 20 meter dipole. At 25 feet and 100 watts I have also made 100's of Q's. Bandwidth is about 75 to 100 Khz. For limited space, I think this is a great option. By pre-marking the whip portion, you can retune to say the CW band in about a minute. Doug -- K0DXV dw wrote: > Hi Stan, > I've built a number of mag loops. > I've used aluminum tubing, copper, and hard-line coax as the main > sections. > I purchased a dead AEA HI-Q loop unit on ebay for cheap years ago and > pulled the capacitor off it. > > The ERP is off-course compromised compared to a dipole. > However, its advantages are: > - small size > - super quite > - Vertical or Horizontal polarization > - In vertical polarization it is broad-side directable. > > Using 2-3" copper fully soldered together as the main body will increase > your ERP. > > MFJ has a box loop which uses a wire. > But a ham can pull their wire off and replace with copper pipe. > In the right size diameter, one and work both 40 & 30 meters no problem. > > Have fun with your design!!!! :) > Duane > N1BBR > ______________________________________________________________ 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
