11-09-2014, 10:57
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#1
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Quiet Professional
Join Date: Jun 2009
Location: Fort Bragg, Nc
Posts: 5
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Base Station
Trying to start a HF Base-station for the partner nation on my current deployment and I am having trouble finding a suitable Antenna the is Omni directional and that can receive and transmit traffic at a Maximum of 500KM. I've unsuccessfully attempted the cobweb antenna and I am going to try a few more. If anyone has used anything in the past it would be greatly appreciated. Also if anyone knows what the setup is to use Harris Tac Chat on data.
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lilrojo is offline
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11-09-2014, 12:32
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#2
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Quiet Professional
Join Date: Jan 2009
Location: Atlantic Ocean
Posts: 136
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T2FD
We have had medium success with various brands of "T2FD" [tilted terminated folded dipole] antennas - installed either tilted or as an inverted vee, it is fairly omnidirectional. Examples include the B&W 90 (and 180), or the Buxcom 1606T2FD. Buxcom also sells the tricky parts so you can build your own.
The 90 foot version cuts off performance-wise at about 4 MHz, so if you want it to work below that, use the longer ones (the SWR is fine down to 2 MHz, but performance is awful).
Buxcom also sells a terminated loop antenna (84216KIT) that strikes me as an excellent idea, but I don't know anyone who has tried it.
Hartley
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Hartley is offline
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11-09-2014, 17:45
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#3
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Quiet Professional
Join Date: Jun 2009
Location: Fort Bragg, Nc
Posts: 5
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Trying to build on to show them how to make one from the basics. Tomorrow I am going to attempt a Multi Dipole using some frequencies i got from http://www.ips.gov.au/HF_Systems/6/6/1. Going to do 4 legs and see how it works. Also using a Ugly Balun at the feed point to go into their 5800 MP. Ill try the ones you suggested to see if they work here. TY
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lilrojo is offline
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11-09-2014, 23:04
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#4
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Quiet Professional
Join Date: Jan 2009
Location: Atlantic Ocean
Posts: 136
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Multi-dipoles
Hi,
Multi-dipoles work fine as long as the freqs are not harmonically related - keep in mind that you will probably have to trim them to slightly different lengths from the calculated ones as they do affect each other.
FWIW, the State Dept. uses a lot of T2FDs on their consulates and embassies - no trimming or expert calculations involved..
If you can get 'em to buy an auto-tuner, there are lots of possibilities.
Hartley
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Hartley is offline
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11-10-2014, 16:56
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#5
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Quiet Professional
Join Date: Jun 2007
Location: Hope Mills, NC
Posts: 2,759
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Have you tried the good 'ol AS 2259 NVIS antenna that came with the PRC-104?? Depending on location, ground conductivity blah blah, (I'm' sure you know this) that antenna may work well.. Also, how are you're freq's propping for 24/7???
Also, as mentioned above, depending on freq spread and harmonics, a couple of fan dipoles, (oriented in different directions) which I think you've tried.
But, it's all about freq's and a good SOI to depict, depending on time of day...
good luck...
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Out of all the places I've been, this is one of'em....
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glebo is offline
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11-24-2014, 17:07
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#6
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Quiet Professional
Join Date: Jun 2009
Location: Fort Bragg, Nc
Posts: 5
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Thank you for the trip we go forward in a couple of days so hopefully this works we set it on az to the forward destination. Doing voice and data with the PN's 5800 series radios.
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lilrojo is offline
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11-25-2014, 06:48
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#7
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Quiet Professional
Join Date: May 2007
Location: Wiesbaden, Germany
Posts: 34
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Must be in the Southern Hemisphere....
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ZUG_master is offline
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11-25-2014, 08:16
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#8
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Guerrilla
Join Date: Apr 2008
Location: Fayetteville, NC
Posts: 280
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69harley is offline
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11-25-2014, 13:29
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#9
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SF Candidate
Join Date: Jun 2010
Location: VA
Posts: 36
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Do you still need help with tac chat? Are you using 150's?
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Dalik is offline
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12-10-2014, 21:53
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#10
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Quiet Professional
Join Date: Jun 2009
Location: Fort Bragg, Nc
Posts: 5
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Finished the OP and we talked 325KM using the Mutiband Dipole and the MSS using a HF Dipole. Worked with Voice and Data 5 by with the use of the 5800 MP Harris radios and Tacchat. We were able to send pictures and data back to the partner nations Base station so I would call this a success. The price cost us about 19 dollars for all materials vs over 1k to buy some expensive premade antenna. Def making it harmonic on the base stations end helped allot.
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Only the dead have seen the end of war. ~Plato
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lilrojo is offline
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12-10-2014, 22:15
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#11
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Quiet Professional
Join Date: Jan 2009
Location: Atlantic Ocean
Posts: 136
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Great!
Congratulations!
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Hartley is offline
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12-11-2014, 02:09
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#12
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Asset
Join Date: Sep 2005
Location: somewhere in the rockies
Posts: 49
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Harris Tac Chat
Quote:
Originally Posted by lilrojo
Trying to start a HF Base-station for the partner nation on my current deployment and I am having trouble finding a suitable Antenna the is Omni directional and that can receive and transmit traffic at a Maximum of 500KM. I've unsuccessfully attempted the cobweb antenna and I am going to try a few more. If anyone has used anything in the past it would be greatly appreciated. Also if anyone knows what the setup is to use Harris Tac Chat on data.
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Hello lilrojo;
I am having dinner with a Harris architect on Friday evening and will ask for some feedback on your request. If you want to PM me I do have some information about the 150, including antenna suggestions.
Helicom6, Out
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helicom6 is offline
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12-11-2014, 02:12
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#13
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Asset
Join Date: Sep 2005
Location: somewhere in the rockies
Posts: 49
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Antennas
You could always start here!
http://rf.harris.com/productaccessories/?pid=9455
Hope you are finding what you are looking for!
Cheers!
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helicom6 is offline
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