I need a small footprint antenna
I need to find a multi band antenna 40-10 meter 80 would be nice but not a must. The thing is I don't have room for ground radials or guide wires. I moved in to a duplex so my yard in small only 6x7. The good thing is the only restrictions my landlord gave me was no holes on the roof or building So it can be big and ugly I know it's like looking for the holy grail but something has to be out there.
Last edited by KI6VDC; 09-29-2010 at 04:12 AM.
I put together one of these,
So far I've just been listening with it, and it's been working ok for what it is.
How about a real antenna instead of a glorified dummy load?
Have you considered a hex beam or multi-band Moxon? Or what about a Butternut or small vertical?
There are lots of choices for us hams with limited space and in my mind, it's hard to beat a hex or Moxon (both are about 70% of the dipole width but actually perform as well/better than a two element Yagi at the same height).
You can feed either with one 50 ohm feedline and work 5 or 6 bands with few drawbacks. DIY for a lot less than commercial versions, too.
Something to think about, eh?
6 x 7 ..hmm Sounds like you need to go "up"
That is as in vertical.
I suppose if doesn't have radials, just do your best you can and let the soil do the work in terms of whatever extent that might be.
73 de Charles - KC8VWM
North American QRP CW Club #3159, SKCC# 5752
6 x 7. That is plenty of room for a 72 foot crank-up tower with a tribander and 2 element 40 meter yagi. Is this what you were also thinking?
If you can NOT put down radials you are screwed. But I suspect you COULD put down radials as long as nobody knows they are there, right? So bury them in a slit in the sod.
Gap, MFJ, and Cushcraft make no radials needed verticals and can be mounted most anywhere.
There is no such thing as a "no radials needed" vertical. I guess it depends what you mean by "need". My 66 foot tall 80 M vertical does not "need" radials, but it DOES need them to work well.
Some sort of radial/counterpoise is needed. I think on of these is a vertical dipole, very short, very inefficient. Just bury the damned radials in the lawn, 4 of them would be a decent start.
I could out radials but they would be short given I only have 6ftx7ft lawn. I have a 5btv I might try. but was looking at the AV-640 look like it does not need radials.
Originally Posted by K3STX
That's actually way more room than you need. I can put a 72' extendable, self-supporting tower on a 3.5' square foundation -- and have. It goes "down" six feet (concrete) and "up" 85 feet (tower + mast). No guys, no radials.
Originally Posted by K3STX
If big and ugly are acceptable, this requires no holes in the roof and definitely less space than 6 x 7 feet.
BTW, this antenna actually works quite well; I've used it, and I just worked somebody last night on the air using one -- his signal was fairly competitive with others in his area using full sized dipoles and such: