Author: Shannon Humphryes

The tower pictured is one of two (2) 360-foot base insulated AM towers that straddle West Gandy Boulevard, the Courtney-Campbell Causeway. This AM facility operates at 620 kHz and was originally owned by the City of St. Petersburg and operated with the Call Letters WSUN and in 1932 became the first directional AM facility. The directional nighttime pattern protects co-channel WTMJ, Milwaukee. These two towers were designed, fabricated and installed by ERI 2005. The base section of each tower is a four-sided structure that matches the base dimension of the original towers built in 1932. Each tower transition to a traditional triangular configuration for most of their height.

The tower pictured is the Milwaukee PBS 3-arm candelabra tower located in Milwaukee’s Estabrook Park neighborhood. At the tower top are Milwaukee PBS’s television stations WMVS and WMVT, WVTV, WIWN and a number of Low Power TV facilities. On the tower shaft below the candelabra is Milwaukee Radio Alliance’s B93.3, WLDB, which is the 2-bay ERI SPHX-2AE which is near the top of the photo. The antenna below that is iHeart’s WMIL-FM’s ERI SHPX-2AC auxiliary FM antenna, which is equipped with optional radomes, and is protected from falling ice by an ERI INVISI-SHIELD®, Electrically Transparent Ice Shield. WMIL-FM’s main antenna is also an SHPX-2AC with radomes and it is out of frame at a little over 100-feet above the WLDB antenna.

This is a UHF RF System for a Repacked Television Station. The system includes a 6-section UF5000 band pass filter, a 5 kW test load, a 3-port QUICK PATCH™ Coaxial Patch Panel and adjustable directional couplers at the filter input and output and at the test load input. The system is rated for 5.0 kW average power. The system is integrated into a floor mounted rack frame.

This is a four channel FM combiner which will feed a new multiplexed Model SHPX-6AC-HW-SP ROTOTILLER® FM antenna. The combiner is built from three (3) reflective 955 Series FM Band Pass Filters configured as a manifold combine and the fourth FM station is added to the system with a 955-6 Constant Impedance Combiner Module. After installation the antenna will be field tuned and the combiner assembled and tuned, including taking data and providing a written intermodulation products report, by ERI Field Service.

These AL PLUS™ UHF Television Antennas have completed tuning and final test and are bagged for shipment. Once they are crated they will be on their way to site for installation by an ERI crew.

This is two-bays of an 8-bay directional master FM antenna built for Miami. The antenna is under going range testing and the results will be included in a directional FM antenna Proof of Performance for each station using the antenna. Each bay includes four (4) 1180 Series broadband FM elements and they are integrated into a custom four-sided support spine which will be top mounted on one arm of an American Tower owned candelabra.

This is a file photo of a 1604-foot tall guyed tower that is owned by American Tower Corporation and was erected in 2007. The 12-foot face tower includes a three-arm Candelabra with a top of steel of 1464-feet above ground level. At the time this photo was taken the antennas had not yet been installed but they soon will be. The tower supports a 12-bay COGWHEEL® Master FM Antenna and Tyler Media’s KTUZ-TV, a Telemundo affiliate. KTUZ-TV transmits with an ERI TRASAR® UHF Television Antenna.

WIBN, 98 GOLD, serves Lafayette and surrounding area in Indiana and Illinois. The photo was taken as the ERI tower crew was finalizing the installation of this 295-foot guyed tower at the end of July 2010. The top 74-feet of the tower is an ERI LAMBDA® Optimized FM Antenna Mounting System and it supports an ERI Model LPX-6C FM antenna. The tower, antenna, transmission line and installation were all supplied to WIBN by ERI. The station had the misfortune it original tower brought down by an accident with heavy farm equipment. The tower was erected at the original location and work started as soon as the insurance settlement was reached. You can read more details on the accident and the aftermath at the Radio World web site.

This RF system provides mask filter and channel combiner for two Low Power DTV facilities which will operate on RF Channels 16 and 18. The filters are 6-section UF3000-63 and each filter input includes a Model DC3011-2 dual port, adjustable directional coupler. The system also includes a DC3012-3 3-port adjustable directional coupler at the combined output, which is not shown. The combined output will be fed to an ERI AL PLUS™ 12-bay elliptically polarized UHF television antenna.

This is a broadband ERI HY0246 3.98 dB high band VHF hybrid power combiner which is just out of the paint booth and heading to shipping. The hybrid will be integrated into a system with an ERI HY0247 4.77 dB high band VHF hybrid. A 10 kW and 5 kW transmitter cabinets will be combined by the HY0247 and it combined output will be fed to the HY0246 will combine that 15 kW with another 10 kW transmitter cabinet for a total output transmitter power output of 25 kW.