A year or so ago I attended an estate sale for the station of W7BUD. I came home with several yagis, some home built and some commercial. Each element joint on these antennas was covered with a smoot
The linear loading wires on my 4el 20/ 2el 40 were very brittle and broke when they were bent during initial installation. I had some copperweld with the same OD so I substituted that. I used the bro
Bob: I attached a 30m 1/4 wave aluminum tubing vertical off the side of the tower about 24 inches and connected the bottom to the coax center. The rest of the tower is considerably higher Z than the
I have several Transco relays including a SP3T one. These seem to have a fairly strong mechanical action. I believe someone once posted here that this type relay is subject to erratic contact since t
Did you ever stop to think that the usual tri band trapped beam uses a single coax feed for all bands and to get a 50 ohm feed point impedance it is necessary to detune the elements from their best l
I have replaced the cables and pulley bearings on my TX472 with it in the vertical position. This avoids having to be concerned with the antennas if you tilt it. There is a description of how I did i
Try http://www.qth.com/ka9fox/elev-guy.text 73, Dan, N5AR I am installing a Rohm 25G tower and would like to go 60ft but my yard limits my guy lengths to 29 ft to the anchor rod footing. I am buildin
Sorry, the link given for info on elevated guy posts is available only by going through all sorts of contortions. Here is the info that is at the end. 73, Dan, N5AR Twr Ant Elevated Guy Post Anchor D
It is possible to make a dust/rain cover for your thrust bearing and install it as I have done. Farm supply stores sell a feed dish for animals, which is made of material similar to an auto tire side
If you are interested in baluns I have put some information on our club web page. www.sdxa,org click on DX Tips on the right hand side to see it. It contains links to more detailed information. To ma
I have seen baluns with shattered ferrite cores. If you shake them they rattle. I am pretty sure that W8JI has balun testing info on his web site. 73, Dan, N5AR Well, if it reads open or shorted then
Jerry, I use a piece of galvanized hardware cloth ( looks like screen wire with holes 1/8 or larger) I cut it into a circle a bit larger than the desired diameter and then cut radial slots around the
Sounds like schedule 40 2 inch pipe with ID a bit over 2 inches might do the job. 73, Dan, N5AR was that manufacturer they it - But there were both pro and con *opinions* in the thread I happen to ag
Joe, pick up a copy of March CQ magazine and p 50 has a nice article re your problem. The simple truth is that most "tiny antennas" use the coax feedline as the antenna. This may or may not be the in
John: I was faced with a similar problem in handling the gamma match wire connection to a horizontal arm on my 131 ft crankup tower. I was concerned that the flexing of the wire would ultimately caus
Dave: I have one of several tall crank up towers built by U.S.Towers. It is 131 feet tall with a load rating of 30sf in an 80mph wind. It has digital readout of height, an anemometer to lower it in s
There has been plenty of discusssion here about power versus db improvement in signal and I will not address that. I have measured S meter readings with accurate equipment on probably 25 different tr
The article is in vol. 3, p37-41. Title "Phased Verticals with Continuous Phase Control" . I believe W6CCP has built and used the device with 2 separate 20m beams. It uses a continuously tunable pi n
The latest ARRL antenna book has complete info for 2 and 3 el 40m beams on p 11-23. There are graphs for gain, f/b, and swr as well as mechanical design details. There is taper, diameter, and wall th
I think you have it backwards Bob. My antenna resonant frequencies moved up when I raised them. 73, Dan, N5AR -- _______________________________________________ ______________________________________