Go Back   WorldwideDX Amateur Radio Forums > Amateur Radio Related > Amateur Radio Antennas


Amateur Callsign Lookup
Enter Callsign:

360 ft. wire antenna 22db gain?

Reply
 
LinkBack Thread Tools Display Modes
  #9  
Old 05-02-2009, 02:52 PM
iTrader: (11)
 
Join Date: Apr 2002
Posts: 8,181
Moleculo has disabled reputation
Default


Quote:
Originally Posted by QRN View Post
360 feet and 22 dB gain?? Maybe on 2m but NWIH on any HF band. My 600 foot antenna only had about 9 dB gain on 20m and that was directly inline with the antenna wire.

QRN, Are you sure you measured the length of your wire properly? I didn't know Canucks knew how to measure in feet

Reply With Quote
  #10  
Old 05-02-2009, 08:07 PM
Captain Kilowatt's Avatar
Professional Amateur
iTrader: (1)
 
Join Date: Apr 2005
Location: Nova Scotia,Canada
Posts: 11,083
Captain Kilowatt will become famous soon enough
Default

Hey come on now. We are bilingual didn't you know that? Actually i grew up with the standard system and learned metric in middle school so it's real easy. Measuring in Smoots however takes a bit getting used too.
__________________
There are 10 kinds of people in this world. Those that understand binary and those that don't.

Reply With Quote
  #11  
Old 05-02-2009, 10:36 PM
Beetle's Avatar
Senior Member
iTrader: (0)
 
Join Date: Dec 2005
Location: Western Washington
Posts: 2,469
Beetle is on a distinguished road
Default

1 furlong = 118.21 Smoots. (Thank you, Google!)
__________________
If you're like everybody else,
you're about average.
73 de K7KBN
CWO4 USNR RET.

Reply With Quote
  #12  
Old 03-21-2011, 06:52 AM
Junior Member
iTrader: (0)
 
Join Date: Jul 2010
Posts: 18
Savoir Faire is on a distinguished road
Default It is possible

However, you will use 450 ohm antenna and a 4:1 balun and a radio with an Antenna Tuner or a Linked Coupler tuner. I know it will have much gain but again very directional and not a lot of usage.

Do as someone else suggested in the posts. Read L.B. Cebiks years of research at Introduction

Check out the DOUBLET instead at cebik.com. It will not have quite as much gain but it is high gain if you make it 140 feet or even 280 feet if you have enough yard or trees. Again you will need ladder line a 4 to 1 balun and an antenna tuner

Best wishes,


Savoir Faire is everywhere (Wheeeeeeee)

Reply With Quote
  #13  
Old 03-22-2011, 05:05 AM
Junior Member
iTrader: (0)
 
Join Date: Mar 2011
Posts: 5
N5GE is on a distinguished road
Default

Quote:
Originally Posted by linearone View Post
I remember reading on some internet site about some end fed wire antenna that was around 360 ft. long and it showed 22db gain. Some hamster's site.
Does this ring a bell with anybody? Id really like top find it again.
That's not possible.

According to an EZNEC 5.0+ Pro model I just made the gain at ten feet above the ground on 14MHz is 8.5 dBi. At 200 feet it's 11.1 dBi.

Reply With Quote
  #14  
Old 03-22-2011, 05:16 AM
Junior Member
iTrader: (0)
 
Join Date: Mar 2011
Posts: 5
N5GE is on a distinguished road
Default

Quote:
Originally Posted by Savoir Faire View Post
However, you will use 450 ohm antenna and a 4:1 balun and a radio with an Antenna Tuner or a Linked Coupler tuner. I know it will have much gain but again very directional and not a lot of usage.

Do as someone else suggested in the posts. Read L.B. Cebiks years of research at Introduction

Check out the DOUBLET instead at cebik.com. It will not have quite as much gain but it is high gain if you make it 140 feet or even 280 feet if you have enough yard or trees. Again you will need ladder line a 4 to 1 balun and an antenna tuner

Best wishes,


Savoir Faire is everywhere (Wheeeeeeee)
What you described is a Beverage antenna. They actually have little gain and are not used for transmitting. They do however have a sharp frontal lobe at the terminated end. They are very low noise antennas and are usually used with a preamp.

They have to be several wavelengths long to be effective.

Amateur Radio Operator N5GE

Last edited by N5GE; 03-22-2011 at 05:19 AM. Reason: Left out low noise comment

Reply With Quote
  #15  
Old 03-22-2011, 10:17 AM
Beetle's Avatar
Senior Member
iTrader: (0)
 
Join Date: Dec 2005
Location: Western Washington
Posts: 2,469
Beetle is on a distinguished road
Default

Quote:
Originally Posted by Wire Weasel View Post
Yeah that might be possible but it still sounds pretty high. Longwires of this kind are also called Beverage Antennas and would need to be in a straight line and will be directional straight off the end. Guys who live out in the plains on a big piece of flat land will have several of these and switch around to obtain TX in the different directions.
You don't transmit with a Beverage antenna; they're for receiving only. (Well, okay, you COULD transmit with one, but not well at all. Make the worms nice and toasty, though.)
__________________
If you're like everybody else,
you're about average.
73 de K7KBN
CWO4 USNR RET.

Reply With Quote
  #16  
Old 07-19-2011, 03:59 PM
Junior Member
iTrader: (0)
 
Join Date: Jul 2010
Posts: 18
Savoir Faire is on a distinguished road
Default You can transmit effectively with a beverage

Read about at:


Introduction




You must have them up higher than 2 to 10 feet as they recommend for receive only and follow the instructions.

Reply With Quote
Reply

Bookmarks
Worldwide Radio Forum



Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 07:22 AM.


Powered by vBulletin®
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0
Worldwide Radio Forum