Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net

   Home   Help Search  
Pages: [1] 2 Next   Go Down
  Print  
Author Topic: Workable Antenna  (Read 2488 times)
VE1BWG
Member

Posts: 9




Ignore
« on: April 19, 2010, 06:49:44 PM »

looking for an antenna that requires minimal foot print  and cost that can handle from 80 meters down to 10.  I have tuners and and ICOM 735

Thanks.
Logged
N3OX
Member

Posts: 8847


WWW

Ignore
« Reply #1 on: April 19, 2010, 07:39:59 PM »

That's way too little information.

What qualifies as a minimal footprint?  How much space do you have?  Does it have to be invisible too, or just small? 

What's your budget?  $20?  $200? 

How much do you actually care about talking a *lot* on 80?  Is that your favorite band?

Honestly, the best very small space antennas are homebrew ones that are designed to fill up the available space, and the cheapest ones take advantage of assets you already have.

73
Dan

Logged

73,
Dan
http://www.n3ox.net

Monkey/silicon cyborg, beeping at rocks since 1995.
K0OD
Member

Posts: 2591




Ignore
« Reply #2 on: April 19, 2010, 09:55:39 PM »

Got trees?
Logged
K2MK
Member

Posts: 407




Ignore
« Reply #3 on: April 20, 2010, 05:20:10 AM »

A vertical might be a good choice. If you have some ground that permits you to bury radials, the initial footprint might seem large but once the radials are buried (thus out of sight) the final footprint will be quite small.
Logged
WX7G
Member

Posts: 6328




Ignore
« Reply #4 on: April 20, 2010, 07:06:56 AM »

Check out the Husterl 6BTV vertical at DX Engineering.
Logged
VE3WMB
Member

Posts: 290




Ignore
« Reply #5 on: April 20, 2010, 07:25:28 AM »

If you have the space, it is hard to beat an 88 foot doublet fed with ladderline or open wire line, up at least 30 feet, as your only HF
antenna. LB Cebik documented this in an article called "If I could only have one wire".  Even if you have to droop the ends down, so long as the
middle half of the antenna is horizontal the impact will not be too significant. The advantage of the 88 ft length is that all of the major lobes will be broadside to the antenna so you can predict what the pattern will be.

As far as verticals go, I can also vouch for the Hustler BTV series .. very good value for the money but you will have to devote some time and effort to putting down some radials.

Michael VE3WMB
Logged
N3OX
Member

Posts: 8847


WWW

Ignore
« Reply #6 on: April 20, 2010, 07:45:50 AM »

Hopefully the OP will come back soon and tell us if "limited space" means a 20 foot square back yard, an apartment balcony, or what. In another thread he was looking at the TakTenna... so "limited space" might mean extremely limited.

If invisibility is not a requirement and there's some patch of dirt somewhere to put in even a small radial system, a vertical probably ends up being a good bet for most situations.  Only a couple square inches of footprint :-)
Logged

73,
Dan
http://www.n3ox.net

Monkey/silicon cyborg, beeping at rocks since 1995.
WB5JEO
Member

Posts: 805




Ignore
« Reply #7 on: April 20, 2010, 08:14:27 AM »

I suppose this one is out. Too much footprint.
http://farm2.static.flickr.com/1412/1162156219_af49980d20.jpg
Logged
VE1BWG
Member

Posts: 9




Ignore
« Reply #8 on: April 20, 2010, 08:14:48 AM »

Area is about 60 by 50 and I have trees.  visibility is a problem but I think I can make my way around that.  All the locals are on 80 meters up here in Dartmouth.  $250.00  is doable for budget.

Thanks for the advice so far.
Logged
K0OD
Member

Posts: 2591




Ignore
« Reply #9 on: April 20, 2010, 10:16:37 AM »

"Got trees?"

Good.

Now, how high?

Huge difference in what one can do with one 15' tree versus, say, several nicely spaced ones 70' tall.
Logged
VE1BWG
Member

Posts: 9




Ignore
« Reply #10 on: April 20, 2010, 11:23:04 AM »

about 50 ' high  only one.
Logged
K0OD
Member

Posts: 2591




Ignore
« Reply #11 on: April 20, 2010, 12:46:17 PM »

Now we're getting somewhere. 2 good choices:

All band doublet at 50' run in inverted V configuration fed with open wire into shack tuner. Radials not required. Great out to about 2,000 miles on 80. Excellent all around antenna on 40 on up. Quiet on receive compared with verticals.  
 

Or inverted L vertical 50' up and about 15' off to anther tree or even sloping downward to the ground. Needs some radials. Killer on DX, especially from VE1. Who needs locals!

Slingshot will get you a support line up 50'
Logged
VE1BWG
Member

Posts: 9




Ignore
« Reply #12 on: April 20, 2010, 02:14:27 PM »

Should I put a tuner on the  doublette?
Logged
VE1BWG
Member

Posts: 9




Ignore
« Reply #13 on: April 20, 2010, 02:15:30 PM »

Thanks for the help.

VE1 BWG
Logged
K0OD
Member

Posts: 2591




Ignore
« Reply #14 on: April 20, 2010, 03:48:59 PM »

There's lots about "all band doublets" on the web.

For example
http://www.hamuniverse.com/hfdoublet.html

If you can get the apex up 40 feet or more this will be an excellent and very cheap all band antenna. Like any dipole it will have nulls on the ends where performance will be  a bit worse. (if possible mount it so your friends, or favored directions, for example Europe, are broadside). On the higher bands the directional qualities may be somewhat irregular. But overall, a very good performer.  

Main disadvantage of a doublet is the need for a tuner (which you already have) and the difficulty your installation may present in bringing the twin-lead into the radio room so it doesn't get too near metal (like gutters).

My experience with such antennas is that they usually work better than verticals, especially on receive. No radials are required for dipoles/doublets.
Logged
Pages: [1] 2 Next   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!