Are you sure that there is pseudo-Brewster enhancement over fresh water? John KK9A There should be less field cancellation at very low angles for a vertical that looks out over fresh water... look up
I doubt that steel price is correct. After shipping you will still need galvanizing. Depending on your antenna load you may be able to use an aluminum mast which needs no corrosion treatment and you
DX Engineering sells element caps if you really feel the need to use them. John KK9A _______________________________________________ _______________________________________________ TowerTalk mailing
Tower top plates and rotator plates are not manufactured very precisely and trying to line up two bearings plus your rotator bearing could be difficult. If it's not lined up exactly it will cause som
Try: http://www.texastowers.com John KK9A Looking for a source to purchase big grip guy attachment preforms and 1/2" thimbles in small quantities PLP part # BG 2146 & BG 2147. In talking to a couple
You should fill the hole with concrete, what else would you put in it? One yard is not a lot, but I'm not sure what the minimum concrete delivery is in your area. Another other option is to buy 40+ b
A model will give you an accurate SWR curve for any height and would provide the best answer to your question. I think 15' is too low for adjusting, I would pull it up to 35 - 40' high which should g
About two decades ago I had two Hy-Gain HDR-300 rotators and I don't recall any bolt hole issues, however I do recall a lot of problems. The biggest issue was with the keyway on the shaft wearing out
sorry, bad typing I guess http://www.qrz.com/db/p40a To: towertalk@contesting.com Subject: [TowerTalk] Fwd: Downhill anchors From: hanslg@aol.com Reply-to: "Tower and HF antenna construction topics."
I thought the original question was about C3I http://www.c3iusa.com , not Force12. I believe Force12 antennas has only changed hands once, from Tom, N6BT to Mark, N5WEB. The new website is at <http:/
I think that it would work, but the rotation indicator would be off. Can't you mount it right side up? John KK9A Thank you Hans. Yours is the first response. I had just about decided that I had final
468 / Frequency (MHz) should get you close, however your tower is really too short for a sloper. Why not just put up and inverted V? You can use your TX SWR meter to tune the antenna. Adding a beam l
I've done as Steve suggested several times during the few years that I owned a crank-up tower. Changing a rotator this way is pretty easy and safe if you block the tower sections. John KK9A 2 current
I've used http://briteproducts.com/ to maintain my P40A towers. No primer is needed. John KK9A I have a tower I have acquired that has been painted red & white that I want to paint over so it looks "
175' rotator cable is not too far. Long time lurker, first time poster. I have a 60' Tower, make unknown, commercial (used to be at a police station before I put it up). Rotator shelf was home made b
There is no way to prevent a lightning strike, you just need a system that can dissipate the energy. A ground rod on each leg of a tower is not a very good lightning ground. You need to spread out do
I would look at using an elevated guy anchor and attaching it higher on the tower or skip the wallmount and rotate the entire tower 15 degrees. John KK9A The normal do-what-the-manufacturer-says inst
I push #14 electrical wire though while I'm gluing the sections together and use that to pull the permanent wires once it's buried. The glue on the end of the wire has not been an issue. John KK9A I'
I have a couple of the Array Solution lightning protection boxes and I think that they would be a good choice for your rotator cables. Polyphaser makes one and I have them as well, but they are more
Hi Bill It will be great to have your back on the air, Your AA6TT/0 contest station did quite well. FCC part 97 states the following: (a) Owners of certain antenna structures more than 60.96 meters (