I live in NW Louisiana. I'm looking for a concrete contractor to install a base per specs for a US Tower HDX-555. I need a hole 5' X 5' 7.25', rebar, about 7 cubic yards of concrete, and 3 anchor bol
I'm installing a base foundation for a US Towers HDX-555. The base will be 5' X 5' X 7.25' per specs. The rebar will be per specs. Concrete will be 4000psi in 28 days. The soil is moist, very firm, a
Thanks for your reply. The rain pipe is solid white PVC schedule 40, not perforated. It carries rainwater runoff, not sewerage. I have decided to wrap the pipe with 2 layers of rubber pipe-insulating
Thanks to all who replied. In the end I decided to reroute the drain pipe around the foundation. Probably it would have been okay just to "cushion" the pipe to allow for some movement, but for the re
What antenna modeling software are you using? NEC-2 used in EZNEC 5 will not model buried radials. Radials very close to ground, as close as 6" on 160M, can be modeled. There is an excellent chapter
Anybody using or have experience with a dual-band Yagi on a common boom from JK Antennas in New York? I'm considering 40M/20M and 15M/10M dual-band Yagis made by them. Any pro or con comments you'd b
Does anyone have a Force 12 Delta 240 up in the air in use? If so, how does it play? According to the Assembly Manual sent to me by Force 12: (1) The weight of the antenna with boom - approx 40 lbs (
How close vertically on the same mast can a new CC XM240 be to a big 10/15/20M tribander without serious interaction? Marsh, KA5M _______________________________________________ _____________________
Thanks to all who responded. Marsh, KA5M Does anyone have a Force 12 Delta 240 up in the air in use? If so, how does it play? Marsh, KA5M _______________________________________________ _____________
I'm rebuilding a KT34XA and installing the KT36 upgrade kit plus new style boom to element clamps. Right now I plan to use the new 3KW balun I got from M2. Is there something better out there I shoul
M2 offers a 3KW and a 5KW balun for the KT36XA. These are not shown on their website. If you want one or the other you can call M2 at (559) 432-8873. Balun Designs also offers a 4:1 5KW balun 4114t.
RFI-Ham.pdf by Jim Brown K9YC Chapter 6 explains in detail voltage vs current baluns. Marsh, KA5M --Original Message-- From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of caraj@cox
Someone posted the following on the subject of antenna tuners: "They aren't adjusting the resonance of the antenna, so what are they tuning?" When I adjust the capacitance and inductance of my "anten
Thanks to all who commented and joined in the discussion. For some there is a real distinction between mechanically tuning an antenna versus electrically matching the complex impedance at the station
Thanks to all who commented. This has been an interesting discussion. 73, Marsh, KA5M _______________________________________________ _______________________________________________ TowerTalk mailing
See Appendix 1 on page 46 of RFI-Ham.pdf by Jim Brown K9YC for Fair-Rite part numbers. www.audiosystemsgroup.com/RFI-Ham.pdf Marsh, KA5M Hi, Need to make common-mode choke to give maximum impedance a
I'm concerned that I'm going to have too much mast above the thrust bearing relative to the length of the mast below the thrust bearing. I want to have 15-feet of mast above the thrust bearing. The r
"Compared to even a full sized 2 element yagi, a properly engineered Moxon will have better gain and F/B bandwidth, considerably higher F/B, a somewhat broader front lobe, and only marginally less ga