Photo Gallery
| The Towers | |
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| Schematic Representations of the (L-R) old and new towers in true relative scale and position. The RMRA antennas are shown in their correct locations approximately halfway up each structure. The figure at each base represents a 6 foot tall man. |
The New Rib Mountain Candelabra, and the old tower built in 1959. The candelabra is home to the RMRA VHF-UHF system antennas. The components of the candelabra are the NTSC and HDTV antennas for WSAW-TV channel 7, WAOW-TV channel 9, and WHRM-TV channel 20. |
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The New RMRA Antennas | |
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The VHF Antenna is an omnidirectional CelWave exposed dipole array Model 340-3. It has a 6 dB gain and 12 Mhz bandwidth according to the manufacturer's specifications. This exposed dipole configuration uses four dipole elements which are currently staggered at 90 degree intervals around the mast. The base of the antenna is at the 255 foot tower level which provides a height above average terrain of about 925 feet. It is mounted on the southeast face of the tower (bearing 135° relative to true north). Overall antenna length is 22.5 feet. Maximum input power is 500 watts. |
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The UHF Antenna is an omnidirectional CelWave Super Stationmaster Model PD1151-2. It has manufacturer's specifications of 8 dB of gain and a 10 Mhz bandwidth. Super Stationmaster antennas employ multiple large diameter copper radiating elements stacked collinearly, fed in phase and enclosed in a weather-proof fiberglass housing. The base of this antenna is at the 250 foot level and is mounted on the northeast face of the tower (bearing 45° relative to true north). Overall antenna length is 15.5 feet. Maximum input power is 250 watts. |
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The VHF/UHF Splitter This tower mounted RF unit is a TxRx Systems crossband coupler Model 80-05-07 which can handle up to 350 watts on each band. It is located approximately 250 feet up the tower. The main feedline is Andrew LDF7-50A 1 5/8" foam dielectric 50 ohm Heliax. Maximum power is 13.2 KW on VHF and 7.18 KW on UHF. The 1/2 inch heliax jumpers connect the splitter to the anntennas. The platform-like structure behind the splitter is an ice shield protecting an antenna at a lower level. |
Photos by Dean Andrewjeski K9PT
The original .jpg images which have four times the resolution of these can be obtained via e-mail from K9DB
