Hello, For a shunt fed tower system I installed at EA5ELT, I made a capacitor with two cardboard pieces taken from the back of a pair of picture frames. Better to use two plastic cutting boards for t
http://aa6z.tripod.com/ Azimuth Maps or AZMaps is the best azimuthal projection map software that I have used and always have on while contesting or DXing. This one you can download and install it in
I read review about a test done in a swedish station with 8 or 12 bevs. The conclusion was that everything received with the bevs could also be heard with the DXE system. David HK1KXA EC5KXA ________
Ditto David HK1KXA EC5KXA _________________________________________________________________ Windows Live: Make it easier for your friends to see what youre up to on Facebook. http://www.microsoft.com
I read an article in 73 Magazine about 17+ years ago by a guy who loaded a tree, about 25' (7.62m) high. 3 to 4 meter long and 15 cm (6") diameter shaft and ovoid shaped leafy top. With a screw drive
I have no idea. Tree-antenna articles are scarce for sure. I dont have the issue with me, maybe a bunch of termites did. Will be good if you give us details on it and also show how fuzzy my memory is
I have a friend's farm near the coast line to use for contesting/DX. There is a group of palm trees, very tall, one of them is 25+ m. Interesting posibilities for a vertical array for top band, but i
Hello, The Antenna Book says is not as good as ladder line regarding losses. The impression I had when I read it, is that it was better than coax anyway, and not for the doubled power rating. There i
I think it depends ... do the dogs have... spots?. Hihi 73 David HK1KXA EC5KXA _________________________________________________________________ Windows Live: Make it easier for your friends to see w
Hello, I wonder if is it possible to use a detuning device like, i.e., the wire rectangle and series variable cap connected to a tower section that electrically vanishes it, to install and tune it at
Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
Date: Wed, 23 Dec 2009 06:38:32 -0500
Bob, K6ZZ, was asking for information on two HK0 stations. I have lost Bob's address, sorry for the bandwidth. This is what HK1AA could find. I don't know if this will be enough. KG4OX was HK0HEU's m
Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
Date: Sat, 26 Dec 2009 08:33:20 -0500
I built the RX loop for 160 described on The ARRL Antenna Book, p. 5-24, 20th edition. The cap was adjusted for maximum RX level. One fellow ham suggested inserting a second variable capacitor in the
Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
Date: Sat, 2 Jan 2010 18:45:11 -0500
I don't know the parameters or limits that decide if it is a "magnetic loop" or a magnetic loop. :o) Literature available limits the circumference (3.1416 times the diameter) to 1/4 wavelenght, becau
Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
Date: Wed, 3 Feb 2010 08:37:53 -0500
Hi, Steve It is also handy if someone lands practically on top of your frequency, like while in contest. Of course, you better move your PBT to pick calls and check for off-frequency callers, a multi
Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
Date: Sun, 7 Mar 2010 09:35:22 -0500
Modeling software is a wonderful tool. It saves a lot of time, roof or tower climbing, waste of material and more. But it must be used with caution. There are lots of assumptions and simplifications
Author: "David J. Sourdis - HK1A" <hk1kxa@hotmail.com>
Date: Tue, 3 Aug 2010 09:56:54 -0500
One important detail, if I am not wrong:You need more than a quarter wave parasitic elements. Otherwise, you'll be doing a parasitic element for around 3,6 MHz.It must be half wavelength minus 4% - 5