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Radio Broadcast Technical Consulting and Sales
10032 Island Drive, Brainerd, MN  56401


Engineer's Log of Mark W. Persons
A Visit to Electronic Research, Inc.

Thursday, May 16, 2013: 

Many thanks to Bill Harland for giving a personal guided tour of the Electronic Research, Inc. facilities to broadcast engineer Jim Zastrow and me.

Bill is Vice President of Marketing at ERI and is a great guy.

ERI employs 146 people at the 205,000 square foot campus in Chandler, Indiana, where FM radio and television transmitting antennas are designed and fabricated.

The company has reportedly built 65% of the FM broadcast antennas and 60% of the television broadcast antennas in this country.  

Lead on!

Above there are new junction blocks where FM antenna bays attach to interbay transmission lines.

To the left is a broadband panel antenna, which will go into an FM master antenna system. 

Above are partially completed new antenna dipoles for the famous rototiller series of FM antennas.

They even take in a recondition and retune antennas that were built years before.

Above is a specially designed tower section undergoing construction.

To the left is a 75 foot long RF anechoic chamber used for developing and testing new antenna designs.   

There was high-tech brazing and precision assembly of antenna parts.  Lots to see.  
Then it was off to the ERI test range where a two-bay FM broadcast antenna was mounted on a pole.

There is a turntable under the pole so the antenna could be rotated to check the radiation pattern. 

Tom Scharf, applications engineer on the test range, was there to show how it is done. 

You can see vertical and horizontal patterns of the antenna under test on his computer screen.

This is arguably the best antenna test range in the country.

The stories go on and on.  Stop in again sometime.  I'll leave the soldering iron on for you. 
Mark W. Persons

Questions?  Email Mark Persons:  teki@mwpersons.com       

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