Richards, Please share with us how you will decide if your new antenna has met your on-the-air operating goals. Will you use the antenna primarily for working DX? Or will you use it primarily for wor
I received several inquiries about my old Coaxial Cable Loss Tables. Yes, I've updated the tables several times. My most recent update incorporates more accurate computations from the VK1OD on-line c
Hi John, Filters are N O T needed to eliminate interference between multiple Field Day transmitters on the same band. Antenna design, proper choice of polarization, physical separation between antenn
Hi Dick, The antenna you've installed is not a base fed, ground mounted quarter wave vertical. Your antenna length is measured from ground level (the bottom of your 5 foot pipe) to the top of the ver
If the photograph in the link below is any indicator; we're going to see many, many safety violations on Monday night. Should be good lessons learned about what not to do. This is a good time to prog
Peter, The boom design for a 40M OWA is highly dependent on local wind and ice loading conditions. All of my Yagis are designed for at least 90 MPH wind with no ice, and at least 50 MPH wind with 3/4
Hans, Not quite true... The most common cause of a change in VSWR measurement when you change the length of a coaxial transmission line is measurement error caused by poor VSWR bridge directionality.
Don't forget that you must comply with the dead weight capacity of your tilt-over tower. This is important, a nearby ham failed to comply with the dead weight specification and his Heights fold-over
Hi Dick, Unlike K3CB's recent experiences with the catastrophic failure ofboth of his Heights crank-up towers (one in dead calm weather and the other in light 30 MPH winds), the collapse of the Heigh
The only one I know of is at NO8D: http://www.cq.sk/img/serial_contesting_2.jpg A much bigger one is now being built at NR5M http://www.nr5m.com 73 Frank W3LPL -- Original message -- ________________
Scott, Congratulations on the progress you're making on your new antenna system. Adding a KT34-XA only 14 feet below your C-51XR at 52 feet will seriously degrade the performance of both antennas. My
Jimmy, The hole dimensions for any Rohn 45G or 55G base is 30" x 30" x 48", for normal soil and weather conditions. If in doubt, consult an engineer. See the following drawing, for Rohn base CB2: htt
James, I'd suggest you evaluate a few more alternatives before deciding: 1. Retain your existing antennas until you install something more permanent. Compared to your existing antennas, you'll be dis
Jorge, I've never had a problem reaching Jeremy by telephone at 1600Z. He and M2 provide superb customer support. 73 Frank W3LPL -- Original message -- _______________________________________________
D., Thats good information. Could you share with us what the antennas are on each tower? It makes a big difference if its a 2 meter beam or a 40 meter beam or a large tribander. tks 73 Frank W3LPL --
It is a tower, right ? http://www.gizmodo.com.au/2008/10/worlds_highest_lego_tower_construction_on_video.html 73 Frank W3LPL _______________________________________________ __________________________
Hi Jerry, I've been using about 20 Parafil guys, including their bullet-style guy terminations, on my AB-105 towers since I acquired them in the UK over 30 years ago. They have been completely troubl
Rob, A 43 foot vertical is 5/8 wavelength on 20 meters. With appropriate radial and matching systems it can be an excellent antenna on 80 through 20 meters, and a fairly good antenna on 160 and 17 me