SBE Chapter 37
SBE Chapter 37
December 16, 2017  

Our Next Meeting

Rohde & Schwarz

All Are Welcome at SBE Meetings;
SBE Membership is not Required

Meeting Date:

January 9, 2018 at 6:00 PM


Rohde & Schwarz USA, Inc.
6821 Benjamin Franklin Dr
Columbia, MD 21046


From Interstate 95, take Exit 41 for Maryland 175 West toward Columbia, Maryland.  Continue on Maryland 175 West for about one mile. Use the right two lanes to exit to Columbia Gateway Drive.  Continue on Columbia Gateway Drive for about one mile.  Turn left on Benjamin Franklin Drive.  Within the office park, take another left on an unnamed pipe-stem and look for the Rohde & Schwarz building at 6821 Benjamin Franklin Dr. There's plenty of free parking in front of the building.


By Mapquest

High Efficiency Solid State Transmitter Design

Guest Speaker: Walt Gumbert and Rohde & Schwarz Engineers

Our January 9th, 6:00 PM meeting will take place at Rohde & Schwarz, a renowned manufacturer of broadcast transmitters and test equipment based in nearby Columbia, Maryland. This meeting is a cooperative effort of our host Rohde & Schwarz USA, Inc. in conjunction with SBE Chapter 37 (Washington, DC), and SBE Chapter 46 (Baltimore, MD).    

Walt Gumbert and several Rohde & Schwarz engineers will be discussing the technical merits of Dohetry amplifiers, liquid-cooled design, and methods employed to simplify ongoing transmitter maintenance.  They will also cover a myriad of other topics: 

  • Product Training Program
  • Expert Discussion of FM Transmitter Products
  • Overall Transmitter Manufacturing Plant and Product Electrical Efficiency Gains
  • Review of the Firm's Background and Manufacturing Plants / Product Development
  • Sample Check List of Digital Television Repack Transmitter Points to Consider
  • Typical Site Drawing, Planning, and Upgrade Implementation
  • Transmitter Requirements to Upgrade to the New ATSC 3.0 Standard
  • Workshop Description of Doughtery Mode Amplification
  • Test Gear Lab / Calibration and Repair Facility Tour
  • Transmitter Setup
    • Conducting a Proof
    • ETL Instrument Use on a High Power Transmitter in Operation Live on the Factory Floor.
    • Hands-on Workshop

A light dinner, kindly provided by our friends at Rohde & Schwarz, will be served about 6:00 PM. We'll briefly discuss SBE business about 6:45 PM and begin our presentation shortly thereafter. Please RSVP before High Noon January 8th by dropping an e-mail to and let us know if we should expect you for dinner! Please tell us if you're representing SBE Chapter 37, 46, 132 (Ft. Meade), or coming as a guest!

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