Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 13-12-2011, 18:24   #1
Registered User

Join Date: Aug 2009
Location: Guaymas, Sonora, MX
Boat: Islander 44.
Posts: 30
Images: 4
"whip" Antennas for 20, 40 meter

I have an Icom 718 but no antenna tuner. From your experience, what is an inexpensive antenna set up that will allow me to talk on 20 and 40 meter bands and does not require a tuner. I was wondering if the $30 whips like these would be acceptable.

Lakeview Company manufacturers of Mobile Antennas and Accessories By WD4BUM.The Ham Stick Folks.

Or can I rig vertical dipoles for better results ? If so, what's the best way.
I'm only going to Mexico and Central America this trip and want to get on the nets.

Thanks for your advice.
__________________

__________________
Cranston is offline   Reply With Quote
Old 13-12-2011, 19:16   #2
Registered User
 
deckofficer's Avatar

Join Date: Feb 2011
Location: Northern and Southern California
Boat: too many
Posts: 4,198
Images: 4
Re: "whip" Antennas for 20, 40 meter

Do you want to get on the nets while underway or on the hook or both? On the hook, nothing beats an inverted-vee dipole hoisted up the mast with each leg as close to 90 degrees as possible, then no tuner needed. Using coil and cap traps, this will work on as many bands as you build or buy the traps for. That is what I use and have (2) fiberglass telescoping 40' poles angled on opposite railings. Underway you could use a vertical whip tuned to your operating frequency, i.e 14.300 mhz would be 468 / 14.3 / 2, for a 1/4 wave antenna. 16' 4 1/2". You will need to run a counterpoise for this antenna if used without a tuner.
__________________

__________________
Bob
USCG Unlimited Tonnage Open Ocean (CMA)
http://tbuckets.lefora.com/
deckofficer is offline   Reply With Quote
Old 13-12-2011, 21:13   #3
Registered User

Join Date: Sep 2008
Location: Camden, ME
Boat: A Thistle and a Hallberg-Rassy 36
Posts: 664
It would be hard to beat a vertical dipole for 20 meters hoisted on a halyard.

For 40 meters deckofficer's solution sounds pretty good.

When you get into short loaded verticals you start to lose a lot of your effective radiated power, but you might be surprised at how well they work in practice. The improving propagation now will also cover many shortcomings!
__________________
SoonerSailor is offline   Reply With Quote
Old 13-12-2011, 23:13   #4
Senior Cruiser
 
roverhi's Avatar

Cruisers Forum Supporter

Join Date: Aug 2005
Location: Kona, Hawaii, Carlsbad, CA
Boat: 1969 Pearson 35 #108 & 1976 Sabre 28
Posts: 6,006
Send a message via Yahoo to roverhi
Re: "whip" Antennas for 20, 40 meter

I've got an AH-4 tuner for sale. Bought it for my 718 but the radio pin out on the radio for the tuner was/is dead. Didn't have time to get the radio fixed before heading to sea. Bought an SGC 230 that didn't info from the radio. $200 for the AH4
__________________
Peter O.
'Ae'a Pearson 35
roverhi is offline   Reply With Quote
Reply

Tags
antenna

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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 Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Fusion 40 Sail Catamarans / South Korea G.E.L. Korea Commercial Posts 0 20-08-2011 22:51



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 13:37.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.