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HF Antenna Resources

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Mark
Administrator

Digitizin'...

Posts: 218

QTH: Phoenix, AZ
FCC Call Sign: W2MIX
License Class: General
Radio(s): Yaesu- FTM400XDR, FT3D, FT2D, FT70DR, HRI-200, Alinco- DR-235 MkIII, SDR- RSP2, RTL-SDR.

HF Antenna Resources Jan 5, 2017 15:18:27 GMT -7 Pat likes this

Quote

Post by Mark on Jan 5, 2017 15:18:27 GMT -7

Here are a few good resources I found when I was researching for my home brew 40m dipole and wanted to share:

This program approximates the optimum feedline lengths given the length of a horizontal dipole and the velocity factor of the feedline for the HF bands.
Note: This program is for a 1:1 balum, use common Feedline Velocity Factor of .90 for 450-ohm ladder line. Can download for use in Excel.
w5dxp.com/goodbad/goodbad.htm

Choosing the Correct Balun
www.dxengineering.com/techarticles/balunsandfeedlinechokes/baluns-choosing-the-correct-balun

COAXIAL CABLE - ATTENUATION & POWER HANDLING CALCULATOR
www.timesmicrowave.com/calculator/

The Top 5 Backyard Wire Antennas (in no order)
n8sdr.com/images/Antennas/backyard%20wire%20antennaes.pdf

BTW - I ended up with a 40m Dipole at 66' (2 x33', 18 guage solid copperweld) and 61' 450-ohn ladderline into a 4:1 RadioWavez balun, 6' LMR-240. It tunes on all bands 6m through 160m with LDG PRO II autotuner.

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Art Lieutenant Posts: 13 QTH: Phoenix, AZ FCC Call Sign: K7ART License Class: General Antenna(s): https://www.qrz.com/db/K7ART Radio(s): https://www.qrz.com/db/K7ART	HF Antenna Resources Oct 4, 2017 21:09:02 GMT -7 Mark likes this Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by Art on Oct 4, 2017 21:09:02 GMT -7 www.w0ipl.net/ECom/NVIS/nvis.htm
	K7ART, Phoenix AZ Art, 73

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Jan 10, 2022 12:36:17 GMT -7

Mark: Welcome to our three newest members, Cody, nightwolfaz, and pixel

Aug 26, 2021 15:14:50 GMT -7

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Nov 29, 2020 17:42:51 GMT -7

Mark: Thanks for stopping by Len, VHF is busiest, the 146.52 calling freq and 147.52 digital freq are fairly consistent. It's just a short scan through to find others. Oct 17, 2020 9:02:13 GMT -7

W7CCE - Len: Thanks for your work. By listing the simplex frequencies you have helped me a lot. I would be interested in which frequencies are most popular in Arizona (Gilbert). Oct 10, 2020 10:40:47 GMT -7

Mark: The Phoenix Matrix frequency has moved to 445.250 due to uncoordinated interference. Oct 7, 2020 18:44:06 GMT -7 *

Mark: Welcome James in Scottsdale!!! Our newest member, let us know if we can help you or if you can help us, lol :))

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Oct 3, 2020 21:20:00 GMT -7

Mark: Welcome Mark J., our newest member from Phoenix

Jul 16, 2020 8:43:33 GMT -7

Mark: Hey Andrew, some are on Fusion, some are on 52... and some are back on HF. Lots to discover, feel free to comment on any! Mar 30, 2020 23:43:26 GMT -7

andrew: are y'allfusion now or still 52 simplex Mar 25, 2020 23:01:13 GMT -7

andrew: hello found this site in a repeater booklisting Mar 25, 2020 23:00:39 GMT -7

Mark: Pat, update your items for sale, LOL Feb 23, 2020 11:58:27 GMT -7

Mark: Beau, also see www.yaesu.com/jp/en/wires-x/id/id_active.php for a complete active list of active Rooms and Nodes. Aug 30, 2019 22:54:33 GMT -7

Mark: Hi Beau, my node is usually just on during the weekends, so that's why it might not be connecting. You might try 145.330RX/144.730TX on the White Tanks or 443.150/448.150 in Scottsdale, for wider coverage area. Aug 30, 2019 22:53:37 GMT -7

beau: New to this (FT-70DR), taking technician test next week. I cannot get my radio to connect - flashes "wires" and goes back to 445.275 on the screen. If anyone can tell me how to program this radio so it connects, it would be much appreciated. Aug 17, 2019 16:02:05 GMT -7

Mark R: Thanks for the Welcome!! Have a new FTM400XDR trying to understand the digital and messaging function/GM Jul 8, 2019 12:54:53 GMT -7

Mark: Welcome Mark R to our forums. Please post any questions you may have so all can help.

Jul 7, 2019 20:18:37 GMT -7

Mark: Hey Vernon, do you mean a FTM-400 by chance? There are several people here, including myself that can help you! Please sign up for membership so we can PM you or post in a thread. Jun 22, 2019 22:33:01 GMT -7

Vernon Lewis - Just learning: I am just leaning how to connect to this Wires-X - probably not getting it right with this FTM-300. So far, no luck Jun 22, 2019 11:19:44 GMT -7