I just ordered a bunch of Cadweld one shots for my new tower, $5.65 each, good price. See: http://www.nettechdi.com/index.html Ordered on Monday, received on Wednesday, wow! No, I have no connection
I just ordered a bunch of Cadweld one shots for my new tower. $5.65 each, good price. See: http://www.nettechdi.com/index.html Ordered on Monday, received on Wednesday, wow! No, I have no connection
I am getting ready to mount a 4 element SteppIR at 55 ft, and an XM240 on the same mast only 5 feet above the SteppIR. I am concerned about degrading the SteppIR. I don't think there will be a proble
The consensus for placing a 4 element SteppIR and an XM240 five feet apart is that this is much too close. Although it is true that the SteppIR can be retuned to lower the SWR because of interaction,
Jerry _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
In reference to the use of aluminum alloy lugs to connect copper ground wires to a tower: I am wrestling with the same problem right now. Especially since I just found out that you can't strap anythi
Congratulations on having a QTH with good DX potential. You need HFTA, terrain analysis program! It was included on the CD ROM with the ARRL Antenna Book 20th edition. With this software you can mode
In reference to an auto transformer matching network for a half wave vertical: In John Devoldere's book, Low-Band DXing, he describes a balun intended for this purpose. It was designed by W1FC, and i
I agree with Tom's assessment of feeding a half wave antenna. After thinking about using a transformer, there is one parameter which is really difficult to overcome, stray capacitance between primary
Jim was asking about feeding an unbalanced antenna (vertical), not a dipole, however your idea still applies. Actually, an air core transformer would work (almost). Taking this thought and evolving t
I'm not an expert on the subject, but I can give you my own observations. Back in the days when I was a decent tennis player (in Florida), cramping was often a problem for players, especially when pl
Another reason to decouple the feedline is to keep noise generated inside your house from being coupled into your antenna. You may or may not notice a noise difference from decoupling, depending upon
Actually, you have to do both. A real implementation will have an attached transmission line. This transmission line, at a particular frequency, may appear as an open, a short, or most anything in be
Let me take a stab at this. Due to the fact that your TVI is on all channels everywhere in your house, a lot of causes are rulled out. It probable doesn't have anything to do with the fact you change
"Outside it hangs from the antenna, drops to about a foot above the ground and comes into my window along with several pieces of coax. It goes under my desk about 6-8 feet and wraps back to the top t
For the past eight weeks, my XM240 has been sitting in my back yard on concrete blocks, awaiting the arrival of my 4 element SteppIR. Today I removed a couple of the elements and found a lot of water
An additional note: I just found out that the loading coils on this antenna are not wound on solid rods like I had thought, they are wound on tubes. So a leak anywhere in the element can send water t
After some more investigation of my XM240 water problem, here are my findings: 1. Water is allowed into the elements around the screws used to attach the loading-hat. 2. I dissembled the elements and
That might be interesting. Assuming you are not using the hairpin match, you may be able to get some operation on other bands. The SWR at the antenna should be very high, but the SWR seen by the tune
Right you are. I was a bit careless with my wording. A tuner matches impedances, not SWRs. Jerry _______________________________________________ See: http://www.mscomputer.com for "Self Supporting To