Horizontal long wire MW aerial.

[Pat Pending]

Going back to my situation, what would be the effect of dangling a vertical from the end of the horizontal about a foot out, say, from the wall before the wire passed through the window frame? The bottom end would need to be tied down to prevent it waving about, I imagine, as it would have been if the connection to the receiver was at the bottom in a conventional set-up.

What is the opinion on this idea.
I have the same situation with my radio workshop room in an upstairs bedroom and a wire going out through an air brick to a tree 10m up the garden terminated with a piece of strimmer nylon line.
Should I add a drop down the side of the house and keep the connection to the radio at the corner of the horizontal and vertical parts?


Mike

I really think that it would not improve the performance much.

This is hard for some to take but.. If you have an upstairs "radio shack" with a purely horizontal aerial, and an earth that runs from the shack downwards, the run from the set to ground acts as an antenna to vertically polarized signals, these signals are generated against the earth, just as if it were a capacitive "hat" and, via the sets input, the capacitive loading of the longwire works to complete the system circuit just as the earth does.

If you would prefer a traditional inverted "L", then take the vertical down at the far end of the horizontal portion of the aerial, thence through a WB transformer to earth, then take the secondary back to your set via a parallel feeder or possibly a twisted pair, you also have the option to use a blaun if you wish. Bringing the signal from the far end of the system gives you the option to reduce building e-field rfi.

If you support the wire on the building use a length of non conductive cable or rope, to hold it away as far as practical, (nylon cored linen line is good, with glass or glazed ceramic insulators), not only will it help reduce signal loss, but it will reduce the likelyhood of damage to property from lightning strikes.

Andy.