Shorted/open coax feed line? Happy hunting! 73, Gerald K5GW In a message dated 5/5/2011 6:10:57 A.M. Central Daylight Time, nf4l@nf4l.com writes: My SteppIR is exhibiting high SWR at all frequencies.
Ken and all, We frequently overlook the wind load generated by the tower structure, not including any antennas at all. In the case of the BX style towers (compared to a round leg/z braced style), the
A Google search for Lexan specifications will return plenty of info. Lexan is a GE brand name for polycarbonate material. There are a number of manufacturers of the polycarbonate stuff today and read
Hello All, There was a period between Tristao Towers and US Towers when Lou was associated with a company called Towermaster. The company was in business maybe a couple of years before it folded. The
William, I recently had a similar problem; needing some ubolts for 2 3/8" outside diameter pipe. No standard sizes were available. The next smaller size was expanded to fit by whaming the center of t
Hi Gary, that is an old AX model tower which predates the BX model and was last made in the late 1970's. Even if the cost is nothing, this is no bargain! 73, Gerald K5GW , In a message dated 6/28/201
Mike, a quick Ebay search for 3 1/2" bearing turned up several four hole flange bearings over a range of $329 to $1300 as well as one offering that goes another 3 days to the high bidder. You can hav
Kevin, if your application requires use of the velocity factor, then the only safe way to have accurate data is to measure it yourself, on the actual cable you plan to use. Velocity factor is known t
How does that old saying go? Don't do as I do, do as I say to do! Reminds me of an older Rohn Catalog cover when they were still manufacturing BX towers. Inside the BX section of the catalog it said"
The voltages are compatible. Be aware there are SDX and DXA versions and you might want to do some checking before just connecting them together. 73, Gerald K5GW In a message dated 8/11/2011 8:25:39
Each yagi design has an optimum stacking distance. There is no universal rule for stacking if you want the best performance. Short boom yagis have lower gain and closer stacking distance. Long boom y
Gene, be sure you save those old brake parts. You may some day have an antenna large enough to need them! It is possible to windmill a brakeless PPM with an antenna of sufficient size! 73, Gerald K5G
Sounds like someone's earth bulge corrections are amiss! This is the name used due to the earth shape being slightly ellipsoid instead of a perfect sphere. The earth diameter is slightly greater at t
Art, re: 204BA: wonder if they can be reconfigured as a 4-el OWA design? Love that bandwidth! On the 3-el 40 tip size: keep in mind that as the taper continues, the element length has to increased du
Dick, you might try an automotive parts store. Many of them have some pretty big tools to sell. 73, Gerald K5GW In a message dated 8/29/2011 6:29:18 A.M. Central Daylight Time, dieven@comcast.net wri
Hi Dan, note the drawing of the folded balun shows the 1/4 wavelength green cylindrical sleeve connected to one of the dipole elements. In normal configurations, the sleeve is not connected, just lef
Jim, standby for screwage! At that weight you will need a freight company and they have all kinds of single shipment, residential pick up and other minimum charges. You might consider removing the mo
Hearing and seeing a relay close is reassuring. That aspect is lost with solid state switches. A relay is very tolerant of voltage levels, current, and polarity. A bulletproof device if there ever wa
Exactly, the point is that three relays are an intuitive means of replacing the rotary switch. I need to learn the art of being more descriptive in emails! I am assuming one would bypass the rotary s
Also known as 3M. 73/K5GW In a message dated 9/29/2011 6:46:06 P.M. Central Daylight Time, k8ri-on-towertalk@tm.net writes: It's a flooded heat shrink tube that comes various sizes made by MMM 73 Rog