Welcome to dLR
  With roots dating back to 1941, du Treil, Lundin & Rackley, Inc. is a leader
  in the broadcast engineering consulting profession. The firm specializes in   frequency allocation and signal coverage optimization of broadcast stations   (AM, FM and TV/DTV). Additional capabilities include propagation studies
  for broadcast facilities and antenna system design. Complex allocation   studies involving multiple FM station modifications are routinely completed.   The firm also assists television broadcast stations in implementing their
  FCC-mandated digital television transmitting facilities. Medium Wave, or
  AM antenna system design is a significant area of expertise within the firm.
  Many of the larger AM antenna systems in this country have been designed   by du Treil, Lundin & Rackley, Inc. and the company’s expertise has been   utilized internationally in a number of high powered AM antenna systems.

  The current firm was formed in 1987 when the Washington D.C. consulting   firms of du Treil – Rackley and A.D. Ring & Associates merged to become
  du Treil, Lundin & Rackley.