The MA-550 will clearly not pass 90 MPH calcs even with no antenna, at least while extended. OTOH, it will clearly pass 90 MPH nested with any reasonable antenna. The question is whether the building
Depending on when your tower was made, and which pulleys they happened to be using then, etc, the cables could be various lengths. You really need to get the old ones out and clone them. You can get
Someone posted here a while back that some UST crankups not only have positive pull down, but also continuous height readout. I think it was marketed to commercial users who needed to set the antenna
You could always get an 85 foot mast and have engineering drawings done on it based on only being cranked up to 55 feet (or whatever it could do at 90 MPH). You would have to convince the city that y
More power to him, but my understanding from gurus such as N6BV and W3LPL is that he would be better off with a stack of 3 element Yagi's. Possibly even a stack of 2 element Yagi's would be better th
I have successfully rotated my SteppIR for several years with an Alfa Spid. It has many good points. The one major shortcoming is that the controller box does not support north centered antennas, and
The problem comes about when you use semi-automatic mode. Semi-automatic mode (also known as point and shoot) allows you to use an arrow key to quickly select the heading you want and then release th
As I mentioned before, the Alfa Spid will not correctly support north centering even in semi-automatic mode, AFAIK. I don't see how a software writer can overcome this problem in automatic mode by cl
Does this mean that if it is pointed at 5 degrees and you select 355 degrees in half auto mode, it turns 10 degrees to the left? When I try to do this, it turns 350 degrees to the right. What did yo
An easy way to interface the drill to the existing tower winch is to replace the bolt that holds the winch handle on with the combination of a stud and a "coupling nut". You can then chuck the approp
Previously, I had posted that I could not get my Alfa Spid controller to support north centering. Thanks to some help from some TT'ers, I now have my Alfa Spid working with north centering. The (undo
Yes, I am aware that there are dozens of programs that will control the Alfa Spid. There are also many programs that only speak DCU-1. Those programs will NOT control the Alfa Spid AFAIK. I want to
I have A/B'ed inverted vees on 80m at 30, 60, 90, and 110 feet. Within 200 miles, the signal levels decrease monotonically with height over about a 10 dB range. At 200 miles, signals are independent
I read in a book that high water content is used to get a really smooth finish, but weakens the concrete. To get to 4000 psi, you need minimum water and cement (ie 4 bag). Rick N6RK _________________
I am happy that you endorse my extensive use of aluminum irrigation "tubing" to build structures. All the farmers around me think this is weird. They put water in their tubing. Obviously, they don't
One thing that has always baffled me is: If it is so important that rebar does not come within 3 inches of the concrete to earth interface, then why is it OK for the anchor bolts to stick up out of t
What kind of rustproofing? Cold galvanize? _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://list
The coax loop is only an issue if the antenna slips on the mast. It is not an issue if the rotator slips on the mast and you reset it in software. Rick N6RK _________________________________________
I purchased an "aluminum racing jack" at Harbor Freight (also available at auto stores). This model (about $60-$80) is rated at 3,000 lbs and spec'ed at 3 inches minimum lift. However, if you remove
Not sure what you were thinking here. IMHO, this solution is tailored as a "last mile" for internet access. With remote station control, you are not trying to get internet access at the radio station