Posts

Weak Signal Propagation Reporter (WSPR). Post #1667.

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If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=atRUzlvmPPc. Here's another exceptional video tutorial from Randy Hall (K7AGE).  In this video, Randy show us how to use the Weak Signal Propagation Reporter (WSPR) to check the performance of your antenna.  The original WSPR program was developed by Joe Taylor (K1JT) and is now enjoying worldwide popularity. According to Randy, the WSPR program gives you real time data about your antenna.  WSPR sends your call sign, power level, and grid square during a short transmission period (usually less than 2 minutes). Receiving stations decode your transmission and post the results online. You can use a website to view a map of the stations you've heard and  the ones that have heard you.  An easy-to-use tool for measuring the effectiveness of your antenna. For the latest Amateur/Ham Radio news and information, please visit these websites: http://www.H

Ham Radio HF/VHF Antenna Lengths. Post #1666.

Ham Radio HF/VHF Antenna Lengths. Post #1666 . http://www.hamuniverse.com/hamantennalengths.html. Author:  N4UJW (Hamuniverse.com). Accessed on 03 November 2018, 0400 UTC, Post #1666. Please click link or scroll down to read the complete artice. Comment:  Here's a handy antenna length chart from N4UJW and the staff at Hamuniverse.com.  I copied the chart and placed it above my rig to facilitate HF/VHF antenna design and construction.  The chart covers 1/4 wave verticals, 1/2 wave dipoles, and full-wave loops.  I trust you will find the chart useful as you build new antennas for your station. Thanks for joining us today. Aloha es 73 de Russ (KH6JRM). Here's the chart: Ham Radio HF/VHF Antenna Lengths Chart in Feet Ham Band (Meters) Frequency (Mhz) 1/4 wave (Feet) 1/2 wave Dipole (Feet ) 1 wave Loop (Feet) 160 1.800 130' 0'' 260' 0'' 558' 4'' 1.850 126' 6'' 253' 0'' 543' 3'' 1.900 1

How to Build a Frugal, Inexpensive 17 meter Rotatable Dipole Antenna. Post #1665.

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If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=r-Uax53rrOM. If you haven't tried the 17 meter amateur radio band (18.068 MHz to 18.168 MHz) yet, you may be surprised just how popular this band is when solar conditions permit.  Antennas for this chunk of the rf spectrum tend to be modest and fairly cheap, especially if you design and build your own antenna from locally available materials. In this well-constructed video from "Marty Drifts", (Jim--WB2FOU), we learn just how easy it is to make a rotatable dipole antenna for 17 meters.  Each step of the construction process is fully explained and reviewed to ensure your understanding of this simple, useful antenna. For the latest Amateur/Ham Radio news and information, please visit these websites: http://www.HawaiiARRL.info. http://www.arrl.org. http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated on Friday afternoons

Homemade dual band half wave flower pot antenna. Post #1664.

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If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=rusIhx0ptNg. Here's a nicely done video tutorial from M6CTP showing us how to make a dual band half wave flower pot antenna for 2 meters and 70 cm.  The step-by-step procedure is easy to understand and should give you good results when you're finished.  Most of the materials can be found at the nearest hardware or building supply outlet.  You may have to order coaxial cable if no local stores carry this item. For the latest Amateur/Ham Radio news and information, please visit these websites: http://www.HawaiiARRL.info. http://www.arrl.org. http://www.arrl.org/arrl-audio-news (a weekly podcast which is updated each Friday afternoon). https://oahuarrlnews.wordpress.com. https://hamradiohawaii.wordpress.com. https://bigislandarrlnews.com. https://www.eham.net. http://www.southgatearc.org. Thanks for joining us today. Aloha es 73 de Russ

Cheap Yagi 6 element beam antenna for 221.1 MHz. Post #1663.

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If you can't view the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=QCxpaCAhj3Y. If you're tired of the noise and congestion on the 2 meter and 70 cm amateur radio bands, why not try the largely unexplored region around 221.1 MHz in the 1 3/4 meter band?  Because of the lack of readily available transceivers and antennas for this band,  you may have to build your own antenna and search awhile for a suitable VHF transceiver covering this band. The search may be worth the effort, since this slice of the rf spectrum offers many of the same advantages as the 2 meter amateur radio band, but without the noise and crowded conditions. In this video, KA5D modifies an original design by WA5VJB to produce an inexpensive 6 element beam antenna centered at 221.1 MHz.  Most of the antenna materials can be found in your junk box or at the nearest hardware or building supply outlet.  Although KA5D uses this horizontally polarized b