The most UNDERESTIMATED antenna out there is the ____________________________________
Fill in the blank and please elaborate a bit.
I think it's the multi-loop, stacked, 64-rhombic array.
Hardly hear anyone using one, but when you do, they're really strong.
A government which robs Peter to pay Paul can always depend on the support of Paul.
-- George Bernard Shaw
The rotatable dipole.
Easy to make from old parts, light to turn, low wind load, and although no gain, it does have 50/50 directionality.
The delta or diamond loop.
-----> Take it to the system!
coax fed dipole.
Most NEW hams want to work all bands with one random untuned antenna with expensive ladderline and tuners..
Pick an interesting band to try and put up a single band, coax fed dipole. Needs no tuner, can be homebrewed with less than $ 40 for wire/coax/insulators etc. Save your money for future Yagis and tower.
Want another band ?, Add two more pieces of wire and make a fan dipole.
Originally Posted by KC2SIZ
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Coax fed monoband dipole - mine cost less than £2 to make and worked fine on 20m for chatting around Europe. Its odd that people would actually buy them.
"The world is my country and to do good is my religion" - Thomas Paine, pamphleteer, radical, intellectual and author - 1737-1809.
Scott Carpenter - motorcyclist, banjo picker, piper, surfer and Skeptic.
Only decent DX antenna I know that's afraid of heights.
Member: Backyard Engineering Group
The top loaded short vertical, followed closely by the DDRR, when properly installed. Problem is, nobody does the DDRR right. I had a fabulous DDRR on 160 for years....it worked better than any other equal height antenna when the ground is as lousy as ours!
"The more you know, the less you don't know."
I have another vote for "the rotatable dipole" and other single-element rotatable cousins like full wave loops.
In a lot of situations, once you have the required support and rotator you might as well put up a beam, but I see many comments from people who seem to think they won't see any difference over their long, nully doublet or random wire until they have the GAIN of a beam, even if simply completely avoiding nulls would be worth 10dB or 20dB in certain directions.
I have used many single-element rotatable antennas and I've never been disappointed. At a former QTH I had really good luck with a rectangular 17m loop hanging from a tree like this:
At this QTH my first antenna for 20m and 17m was a thin wire rotatable delta loop supported on fiberglass fishing poles:
Even if you put up CROSSED switched dipoles for a given band, a rotatable dipole or other similar antenna will be around 3dB-4dB better in gain at the four 45 degree offset headings. If you can put a beam up, all the better, you probably should. But if you can't, a bidirectional antenna you can actually point on the right heading has a pretty substantial advantage.
The tree-supported 17m rotatable rectangular loop was turned by a Radio Shack TV rotor... It was really quite good and with the terrain and soil conditions I had at the old QTH I found I could work stuff on it that I couldn't even hear on my homemade 17m ground plane (which happened to be a big improvement over my long random wire). You probably don't want to put up a tower or strong mast with a real rotor and then waste it on a single-band bidirectional rotatable antenna but sometimes circumstances mean you can get "rotatable" more easily and cheaply than "unidrectional beam" and that, I think, is under-rated.