Discussion in 'Amateur Radio Equipment Reviews' started by AA9ZZ, Jun 14, 2008.
Is there such a thing as a good HF no radial multiband vertical?
Welcome to Zed. IMHO, I cant picture a vertical without radials working worth a hoot. Ive read some reviews, I forget if it was a Gap or BTV type tenna, but some gave it good reviews. I think they must have moved up from a coat hanger to have thought it did "well".
Put in some radials on a vertical, it will be worth the time and trouble.
There are some verticals that are half wave dipoles fed in the center. I think Cushcraft make some. I think MFJ also has some that work on that principle. But they are either pretty tall, or the elements for the lower bands are shortened.
I have never been in a position to try one, but I should imagine they work pretty good, because the point of most radiation - the feed point - is elevated above ground compared to a quarter wave ground mounted vertical.
The GAP antennas are vertical dipoles. No radials.
Google "Vertical Dipole" for information about how to build your own.
I've used the Cushcraft series of verticals with "counterpoise" radials at the bottom, short (couple of feet) wires that are at the bottom of the antenna near the feedline. I currently have the R-8 up on the roof. They seem to work fairly well and I have no complaints other than some mechanical issues with the R-8 and the inability to tune it as well as previous models.
If you're looking for a vertical but don't have the room to run the typical radial wires, take a look at one of these antennas.
Well then, in then in that case, the GAP would be good without radials!
Thank you RH for the additional information-
Sure.. the Inverted-V kicks buttocks.
However if that isn't vertical enough, there is the counterpoise. For apartment dwellers or others who need to have a stealthy antenna, a ground plane isn't an option. It's possible to use, for instance, the bulding's rain gutter system as a counterpoise. If the building is big enough, it's a substantial counterpoise. The vertical will work, just not the same as one with an actual ground plane.
I'm not in that particular situation anymore, but my 2m antenna is a homebrew vertical dipole. Works well, so why not.
When I first setup my 6BTV I didn't put radials down. The vertical w/o radials worked ok. The following weekend I put down a few radials for 10 and 20 meters and the vertical worked better. The following weekend I put even more down and the vertical worked even better.
So....you may find a brand or type that says radials not required....but put them down and you'll see how much better it performs.
The Outbacker Outpost works for me (basically a big metal tripod that is 'capacitively coupled to the ground, eliminating the need for radials'. Thats the fluff and hype, anyway; but it DOES seem to work very well).
I have an Outbacker Outreach that I use on it. I think there are probably better antennas to use (screwdrivers, hamsticks - easier to use), but this combination works pretty good. I've run across references on the web on how to make a sort of home-made Outpost using copper sheeting (for example).
Yes. What MAKES one good is engineering, installation and location, not necessarily in that order. A vertical half-wavelength antenna is much less critical to feed than a quarter wavelength antenna. See for example the Cushcraft R6000 or the R8. Not to mention the Force 12.