Radio World is featuring winners of its 2011 “Cool Stuff” Award this month.
By eliminating the use of copper in the outer conductor of this transmission line, ERI reduces component prices (and you know how precious copper can be). By using aluminum instead, ERI also cuts down on weight, which simplifies support considerations.
The 1329Line is a family of rigid transmission lines with aluminum outer but copper inner conductors, available in 3-1/8-inch, 4-1/16-inch and 6-1/8-inch (both 50 and 75 ohm) sizes.
The bellows expansion compensator accommodates the differential expansion between the inner and outer conductor. Vertical and horizontal spring hangers are designed to support the system and compensate for differential expansion between the tower and vertical and horizontal runs.
The systems include galvanic adapters to allow interconnection to new or existing brass and copper components.
Tom Silliman of ERI shows off the display. Photo by Jim Peck