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.
-----> I. Drink. Your. Milkshake!
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!
"A republic, if you can keep it."
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.