13-05-2012, 07:56 PM
You might find the website at the link below of interest Rob.
It outlines the design and construction of MW indoor frame aerials. The one shown is 40" square so is rather large. However, there's no reason why you shouldn't make it small and increase the number of turns, though a smaller version wouldn't have quite the same directivity. It's on my 'to do list' to make a smaller version and teat it with my antenna analyser to check the frequency range, adjusting the number of turns based on the results, and to post my experience on the forum if it's successful:
http://www.mds975.co.uk/Content/aerials1.html
People often say that have as 'long wire' outdoor aerial, by which they mean a wire as long as will fit into their suburban garden. I was always taught the to qualify as a 'long wire' and aerial needs to be at least one and a half wavelengths long, so on 200 Metres say, that would need to be 300 Mtres long, and few of us have that sort of space to play with.
You might actually find that just 15 feet or so of wire laid on top of your living room carpet around the skirting board will give reasonable results.
Hope that helps a bit.
Best of luck with your PE80, which looked very nice on Paul's pic on the forum.
Great to see you and other forum members at the NVCF today! When I get home tomorrow I'll post a few pics on the forum.
It outlines the design and construction of MW indoor frame aerials. The one shown is 40" square so is rather large. However, there's no reason why you shouldn't make it small and increase the number of turns, though a smaller version wouldn't have quite the same directivity. It's on my 'to do list' to make a smaller version and teat it with my antenna analyser to check the frequency range, adjusting the number of turns based on the results, and to post my experience on the forum if it's successful:
http://www.mds975.co.uk/Content/aerials1.html
People often say that have as 'long wire' outdoor aerial, by which they mean a wire as long as will fit into their suburban garden. I was always taught the to qualify as a 'long wire' and aerial needs to be at least one and a half wavelengths long, so on 200 Metres say, that would need to be 300 Mtres long, and few of us have that sort of space to play with.
You might actually find that just 15 feet or so of wire laid on top of your living room carpet around the skirting board will give reasonable results.
Hope that helps a bit.
Best of luck with your PE80, which looked very nice on Paul's pic on the forum.
Great to see you and other forum members at the NVCF today! When I get home tomorrow I'll post a few pics on the forum.
Regards, David.
BVWS Member.
G-QRP Club Member 1339.
'I'm in my own little world, but I'm happy, and they know me here'
BVWS Member.
G-QRP Club Member 1339.
'I'm in my own little world, but I'm happy, and they know me here'







