Posts

Ham Radio: 40 metre dipole in a small space

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Thanks to Tim (G5TM) for this great idea on how to "squeeze" a 40 meter dipole antenna into a very small space, such as a garden or tiny urban lot. The key to this antenna is the use of 450-ohm ladder line and an optional antenna transmatch (i.e. "antenna tuner"). If you can't see the video, please insert this title URL into your browser search box:  https://www.youtube.com/watch?v=B5x_02BUDas Thanks for joining us today. Aloha es 73 de Russ (KH6JRM).  

Top 7 portable Ham Radio Antennas on Amazon

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Amazon offers some interesting amateur radio products, including a wide selection of antennas and accessories. Thanks to Jason (KC5HWB) for this review of what he considers to be the top 7 portable ham radio antennas. If you can't see the video, please insert this title URL into your browser search box:  https://www.youtube.com/watch?v=DjzLQnDgZu4 Here are some comments from Jason (KC5HWB): My current top 7 choices for portable antennas on Amazon. As an Amazon affiliate, I can earn commissions from qualifying items. Teyleten Robot Portable No Tune End Fed Half Wave Antenna Module https://amzn.to/3UZmbas K6ARK QRP Antenna Matching Unit Kit https://amzn.to/3EaCgUv K6ARK 20W Antenna Matching Unit Kit https://amzn.to/3yc9mzy Radiowavz END FED Half Wave Antenna, 40M https://amzn.to/3SQ45Wn RadioWavz DX40 Off Center Fed (OCF) Dipole Antenna https://amzn.to/3ru3oXg WINDCAMP Gipsy 5-50MHz HF Horizontal Dipole Antenna https://amzn.to/3rnK8dX Shark Antennas S-F5MS 5-Pack (10, 15, 20

Local Emergency Communications with NVIS

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If you want good, reliable HF communications for local or regional emergencies, please consider the NVIS (Near Vertical Incidence Skywave) antenna from "The Tech Prepper." This antenna provides excellent local communication for the 40 meter and 80 meter amateur radio bands. If you can't see the video, please insert this title URL into your browser search box:  https://www.youtube.com/watch?v=yYXVKtu3nwk Here are some comments from "The Tech Prepper": 18,454 views Premiered Feb 18, 2021 In this video, we'll take a look at building a simple 40m and 80m dipole for $20 dollars. Then, we'll deploy it in an NVIS (Near Vertical Incidence Skywave) configuration for local and regional communications. If you're new to the channel, welcome! I'm "The Tech Prepper" and I try to produce weekly videos on all topics related to preparedness. Thanks for supporting the channel! If you like the content, don't forget to hit the thumbs up icon, leave

Vertical Antennas-A Complete Guide

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Thanks to Peter Waters (G3OJV) for this "complete guide" to vertical antennas.   In this well-paced video, Peter examines the theory, construction practices, and uses of popular vertical antennas. You may even discover some new aspects of vertical antennas which can help you in your amateur radio adventures. If you can't see the video, please insert this title URL into your browser search box:  https://www.youtube.com/watch?v=uza3e8E_2uQ Here are some comments from Peter (G3OJV): I found one of the best text Guides I have ever seen covering the topic of vertical antennas. Whilst it is aimed at 160 metres, much of it is applicable to all the HF bands. Let me take you to the link so that you can benefit from the excellent information provided. Vertical Antenna Text Guide http://k9yc.com/160MPacificon.pdf Ham Radio Store https://www.hamradiostore.co.uk Energy Saving Video https://www.youtube.com/watch?v=azFpl... ----- Thanks for joining us today. Aloha es 73 de Russ (KH

Moxon Antenna A Great First Beam

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If you want a simple, effective HF beam antenna, please try this Moxon Antenna design from Derek (HL1ZIC).  The antenna is easy to build and provides modest gain for the HF band of your choice. This antenna would be perfect for those 10 meter openings now occurring during the current solar cycle (Cycle 25). If you can't see the video, please insert this title URL into your browser search box:  https://www.youtube.com/watch?v=jUiKZ3EIiIc Here a few comments from Derek (HL1ZIX): The Moxon beam antenna is the perfect first beam for the new ham. Learn how to make a Moxon beam for your home qth, get some new ideas, and see some examples. ----- Thanks for joining us today. Aloha es 73 de Russ (KH6JRM).  

Build a random wire end fed antenna and make amazing contacts.

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Michael Martens (KB9VBR) does an excellent job of describing the theory, construction practices, and use of random wire end fed antennas. If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=D_-aNzrIXWs Here are some comments from Michael (KB9VBR): Can a non resonant antenna be efficient? It sure can. I show you how to build a non resonant random wire antenna with a 9:1 transformer. FT-140 43 mix Ferrite Toroid: https://www.mouser.com/ProductDetail/... Toroid Core FT140-43 Ferrite: https://amzn.to/3WKPApC 18ga Enameled Magnet Wire: https://amzn.to/3WFhSBX 4 in. x 4 in. x 2 in. PVC Junction Box - Gray: https://www.homedepot.com/p/Carlon-4-... Homebrew Antenna Challenge: https://youtu.be/wqKuttdHV8o Random Wire end fed antenna resources: https://toroids.info/FT140-43.php https://sprott.physics.wisc.edu/techn... https://udel.edu/~mm/ham/randomWire/ https://m0ukd.com/homebrew/baluns-and... Like what you see