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The goal, One Antenna, 10 Bands, 10 - 12 - 15 - 17 - 20 - 30 - 40 - 60 - 80 - 160 Meter. Upon initial testing, very good results.
No, this is not about some cute antenna that's about the size of an oatmeal box and runs at 100% efficiency from 160 all the way up to 10 meters (and 6 meters if you leave the oats). In fact, there's nothing new on this page. It's just about a very common HF antenna that I recently built. First an eyes check. Do you see an antenna in this picture?
Simple vertical radiator with a not so simple matching box. No traps, no tuner required.
In we ham radio operators' continual quest for the perfect antenna system, we try some strange things at times, but often, the simplest is also the best. That is certainly the case with the basic "loop" antenna, an often misunderstood critter, but one that gives absolutely the most for each foot of wire of any antenna I have had occasion to play with. First, let me reassure you that such an antenna does not necessarily take much room. One reason I went to one in the first place is because I didn't have room for a 260-foot-long dipole for 160 and I wanted to give the "top band" a try for the first time in my 45 years of being a ham. If you are talking 75 meters (and up if you want a multi-band antenna...more later on that), it's only about 65 feet on a side in a square arrangement
This design will work all bands from Top Band to 10M using a tuner.
Basic design details for a number of different antennas from 160m to 40m
A popular misconception about vertical antennas for the low bands is that they must have elaborate ground systems. Here’s a vertical antenna for 80 and 160, fed with a single feed line that is simple, effective, and requires no ground system. You won’t beat the 4-squares, but you will hold your own against a grounded quarter wave with ridiculous amounts of copper in the ground.
I have always admired the Butternut vertical antennae. They are very well built using good quality doorknob capacitors and nice airwound lowloss coils. Having had an HF2 for a while I decided to see if I could make a homebrew improved..?? version.
I have to thank Con, DF4SA, of Spiderbeam for giving me the opportunity to inexpensively try their new 18m telescoping pole. I turned it into a great 160m through 30m antenna; as a bonus it makes a good tree surrogate to hang a 15m dipole from.
On the higher bands the same antenna is usually used for both TX and RX . The Low Bands are different in that one good TX antenna is probably adequate. If the TX antenna is relatively inefficient we can compensate by using more power. But for RX we require antennae that have the very best signaltonoise ratio (SNR) that we can muster. It is also very advantageous if these antennae are directional. Sensitivity in the RX antenna is not really that important so long as the SNR is excellent.....A good low noise amplifier (preamp/LNA) can give us all the sensitivity that we need.
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