Towers are structures to hold antennas. For repeater service many towers are located on remote site. Many sites are high up in the mountains. Many mountain site are enviomentally hostile in the winter from ice and snow. Also, to install and maintain these antennas one must access the tower. Climbing gear and such skills are normally required to do this. These antennas work with radio equipment at sites. Many times the radio equipment has mounting challenges. This page covers these issues and more.
There was no logical place to mention tower leg angles so it will be posted, here. Two figures standardized the angle for both the legs and mounting brackets you may be purchasing; they are the ratio and angle in degrees. The former is the ratio of a unit away from the leg will give you a unit(s) in elevation. For example, 1 inch out (away from the leg) will give you 16 inches rise in elevation, as in the case of a 16:1 angle, which is very common in microwave freestanding towers. The latter is reference to straight up and down (0°) Consider this when building your own brackets. There are three main angles for commercially towers;
Hardware
Rohn 25G notes (of course)
Anti-Twist Bracket For the above tower type
Cabinet notes For Motorola, GE and other brands and types.
A rack mount bracket Inside of a cabinet taking 3 rack units
Cavities/Duplexer Home brew from coffee cans !
Antenna bracket For mounting on a large microwave tower
Antenna bracket Broadcast version (Straight leg)
Special Antenna bracket For the 1 Meter hub repeater for KBARA
Light duty V-V bracket For smaller beams and dipoles, like the two, below
Climbing gear and other information
Antennas
a 3-element yagi beam antenna for 1 1/4 meters or 70 ceni-Meters Light Duty version
a 3-element yagi beam antenna for 1 1/4 meters or 70 ceni-Meters Heavy Duty version
A simple dipole For 1 1/4 meter band; medium rugged
A simple dipole Same as above, except close spaced for more strenght
A dual band unity gain antenna set For 1 1/4 and 2 meter band; medium rugged
Repair an antenna Collinear (Station Master) type
Build a new antenna Collinear type
Evaluation of TeleWave's ANT450F10 Commercially made for UHF
Evaluation of Sinclair's SC320-SF4SNM Commercially made for UHF
A look at RF paths Where these antennas could help
A look at Commercially made antennas Just to buy
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