The antenna pictured in East Tennessee PBS’s Sneedville, Tennessee, main facility WETP. The signal serves communities in northeast Tennessee, southeast Kentucky, and western North Carolina, and Virginia. This is an elliptically polarized antenna, and so the climbing facilities are a fiberglass ladder to minimize distortion of the vertically polarized azimuth pattern. The antenna is installed on a 540-foot guyed tower ERI manufactured and installed in 2005.
Author: Shannon Humphryes
Side mounted ERI TRASAR® UHF television antenna
This is an auxiliary side-mounted TRASAR® UHF television antenna for RF channel 36. The antenna has just been put in place, and next, it will be connected to the transmission line that will feed it. Once connected, it will become operational, and the new top-mounted channel 36 TRASAR® main antenna will be installed.
A 2-Bay Master FM Antenna serving the Motor City
This is a 2-bay 1180 Series master FM antenna serving Detroit. The system is the primary antenna for Cumulus’s WDVD and Entercom’s WYCD. The antenna and combiner system also provides auxiliary facilities for WDRQ.
Welding Leg Flanges to a New LAMBDA® Optimized FM Mounting System
Welding flanges onto the legs of a new ERI LAMBDA® Optimized FM Mounting System. The LAMBDA® mounting system was designed initially to reduce FM antenna failures due to stresses from tower movement. The design specified a maximum bending radius of the top-mounted free-standing tower sections, and this resulted in a very stiff tower designed to support side-mounted FM antennas. Typical 20-foot tower sections do not allow symmetrical antenna element mounting locations because the cross members will have a different geometry behind each of the array elements. LAMBDA tower sections make the signal scattering from the tower a constant because the structural member spacing is a halfwave at the operating FM frequency. All the antenna array elements see the same tower face geometry because the tower’s reflected (scattered) signal is identical for each bay of the array.
New Top-Mounted UHF TRASAR® Television Antenna in Fabrication
The top-mounted TRASAR® UHF Television Antenna is partially through slotting. Once the outer conductor slots and holes have been cut, the base flange will be welded to the outer conductor, and the antenna will be sent to galvanizing. The antenna assembly and final tuning and test should be complete in less than 60 days.
Another 16-Bay AXIOM® Master FM Antenna in Final Testing
Another 16-Bay AXIOM® Master FM Antenna is nearly complete and ready for shipment to site. The AXIOM is a very cost-effective multi-station FM antenna available in 4, 8, 12, and 16 bay models with power handling capability in a dual input configuration of up to 240 kW. The AXIOM is optionally available with radomes or electrical deicer for harsh locations with significant snow and ice accumulation.
8-Bay ALV Series High Band VHF Antenna
A new ALV Series 8-bay high band VHF television antenna is now complete and tested. The antenna is awaiting shipment to its permanent home. The ALV Series is a single channel high band VHF slotted array antenna available in 2, 4, and 8 bay models. ERI is now offering versions of the ALV Series antennas with circular and elliptical polarization. The horizontally polarized models of the ALV antennas also continue to be available. These are highly reliable, lightweight, low wind load, side-mounted high band VHF television antennas that most often used for auxiliary antennas for full-service television stations, TV translators, and low power TV stations.
WXXI-TV Rochester, New York – Top Mounted UHF TRASAR® Television Antenna
The antenna pictured is the new ERI TRASAR® elliptically polarized UHF television installed for WXXI-TV’s new repack RF Channel 22 antenna. The move from RF Channel 16 to RF Channel 200 was part of the FCC mandated repack to free up RF spectrum for wireless communications. The antenna is mounted at the top of the 276-foot WXXI owned tower on Pinnacle Hill southeast of Rochester. The top of the TRASAR antenna is 345-feet above ground level. This antenna replaced the RF Channel 16 elliptically polarized ERI TRASAR antenna installed in 2014. Photo courtesy of Mike Fitzpatrick/NECRAT.us.
Four Bays of a new 8 Bay ROTOTILLER® FM Antenna Ready for Packing
These are four bays of an eight-bay full wavelength bay-to-bay spaced ROTOTILLER® FM antenna. The antenna has completed tuning and testing and has received its final coat of paint. It is now being packed for shipment to the site that will be its new home for the next few decades.
A One-Bay LP Series ROTOTILLER® FM Antenna in Tuning
Pictured is a single bay Model LP-1E ROTOTILLER® FM antenna in tuning on ERI’s Tuning Deck. This antenna is rated to handle up to 9 kW of input power. This antenna will be leg-mounted, and the mounting bracket and all other required components are supplied with the antenna.