Bill, Its really all about how much budget you have available for the guy wire system and how much risk you're willing to accept that the performance on one or more band will be degraded. You can alw
Here are some easily understood installation instructions from the official Phillystran web site. http://www.phillystran.com/365.htm 73! Frank W3LPL -- Original message -- ___________________________
Joe, constraint you're trying to solve. Is your tower already installed, and it was improperly aligned with your guy points? Or are there obstructions that prevent you from using the same 120 degree
Carl, That might work, but why not install an equalizer on the anchor for the outer guy wire and fasten both guys to the equalizer plate? Of course, all three guys should be relocated to preserve ide
Barry, Its described on page 83 of the the 1937 Frank C Jones Radio Handbook. The "RCA Spiderweb Antenna System" was one of the antennas that RCA marketed for their pre-war shortwave radios. The othe
Hi Tim, Penetrox-A uses a vaseline suspension. Vaseline can be problematic with rubber and some other materials. Penetrox-A13 and -E use a synthetic suspension -A and -A13 use aluminum particles -E u
Six aeronautical radio stations provide coverage of the six North Atlantic flight information regions: Bodo Radio (Norway) Gander Radio (Canada) Iceland Radio (Iceland) New York Radio (USA) Santa Mar
Dennis, To eliminate interaction with a nearby 10 meter Yagi on Rohn 45, the first insulator must be not more than three feet from the tower. Ideally, the next insulator should be spaced not more tha
Dick, You question is much more complex than it would appear because of the five ham bands covered by a log periodic antenna. There's no simple answer, and an EZNEC model would provide the most accur
Hi Dick, Before I leap to an answer, how many and what types of antennas will be supported by your tower? As you can already see from your responses, the most favored approach is to use Phillystran o
Bob is correct about the diode effects potentially caused by guy wire attachments to towers. Guy tension helps to reduce the probability of a serious problem, but for multi operator and single operat
Box cutters are dangerous tools, intended to be used at a safe distance from body parts. Using a box cutter near your opposite hand or other body parts can easily result in an accidental deep cut rig
Steve, Your symptoms make me suspicious that your antenna may be fine and your impedance measurements may be bad. What instrument are you using to make your measurements? MFJ analyzers and many labor
My full size 3 element 40M 3 element Yagi is mounted on a Tic Ring, just above the 100 foot guy level. This Tic Ring uses two support masts that support the boom guys of a large Yagi. I route the co
I installed more than 10,000 feet of black PLP fiberglas guys on my towers 12 years ago. The top of each rod has just begun to turn white. There's no evidence of reduced strength and it affects only
To confirm Terry's model, my 160M 4-square uses 122.5 foot military towers similar in cross section to Rohn 45. The towers are mounted on 12 inch base insulators intended for AM broadcast stations. 6
OK guys... After all of these ham fisted attempts to pass on a simple link to an ebay auction, here's how to reference an ebay auction and get it right every time! Got to: http://www.ebay.com Search
Hi Carl, AB-105C strength should be about midway between Rohn 55 and 65. As a rough approximation, the relative strength of a well engineered tower is a mainly a function of face width and weight per
Carl, You can learn more than you ever wanted to know about AB-105 by using Google to search the towertalk archives. Its a much more powerful search capability than the search tool provided on contes
Tom, Unless your 50 ohm phasing lines are terminated in 50 ohms (unlikely in any practical phased array), they will not produce the desired phase delay. The same applies for 75 ohm lines and 75 ohm t