W1AW and 80m psk31 interference
The following is an open letter to station W1AW at the ARRL. If you feel like co-signing, please add your name and call sign (if you have one) in the comments and/or contact W1AW. It should be needless...
View ArticlePSK 31 frequencies
There are many web pages listing the psk31 frequencies from the band plans. Unfortunately, the planned psk31 frequencies vary from (ITU) region to region on some bands, or end up conflicting with other...
View ArticleModeling compact 160 meter antennas
I am a recently licensed amateur radio operator, callsign AB1KW. Like many other ham radio enthusiasts, I have a yard big enough to fit a nice antenna for 80 meters and the higher HF bands, but not...
View ArticleA multi-band HF loop antenna
Amateur radio has 10 HF (shortwave) bands, from 1.8 MHz (160 meters) through 28 MHz (10 meters). The different bands are great for talking to amateur radio operators (hams) at different distances,...
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How to build a slingshot antenna launcher
Slingshot antenna launcher Slingshot antenna launchers are used to launch a line over a tree branch, so antennas can be suspended from high up trees. They can be purchased from various sources....
View ArticleMore small 160m antennas
The last series of compact 160 meter antennas were not that satisfactory. Luckily, there is an easy, relatively compact and better performance 160 meter antenna design available, created by Rudy...
View Article160m spiral loaded vertical dipole
This is the smallest 160m antenna to date. It is a simple spiral loaded vertical dipole, 17 meters high and with the spiral arms extending to almost 4 meters out, for a total space of just under 6x6x17...
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Vertical H antenna: radiator length vs height vs gain
The N6LF vertical H antenna is an off center fed, capacitively loaded, vertical short dipole. This antenna is a compact alternative to the quarter wave vertical, giving just a little bit less gain than...
View Article160m double L antenna
After much planning and modeling of various different antenna types, I finally settled on a very simple antenna for 160. The reason? This one works just about as well as the larger more complicated...
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Lightning protection at AB1KW
"Cable tray"Grounding bulkhead Bit by bit, I am trying to make my station more lightning resistant, with the ultimate goal of being able to stay on the air even during a thunderstorm, at least...
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