This shows the old KGW AM 620 radio towers in North Portland, adjacent to I-5 and Portland International Raceway (looking North across Interstate highway).  The tall towers were removed in December of 2000.  More info at http://www.portofportland.com/

 

And, a peek inside of the old AM 620 RCA tube transmitter

 

The newer Continental AM 620 transmitter, at center right under the orange bar.   Through the miracle of modern technology, the newer transmitter is one fifth the size of the older.

Thanks to Chris Weiss of Clear Channel Communications, Portland for the inside pictures.

 

KGW radio, 1924

KGW Picture Parade

The above two photos courtesy the Puget Sound Theatre Organ Society.   They have early Portland radio broadcast pictures of KOIN and KEX too.