(the following images were scanned from a copy of Popular Radio magazine article, “A Mobile Radio Relay Station”, August 1924.  If you click on the magazine page it will expand into a larger image.)

A Mobile Radio Relay Station, Popular Radio, August 1924, pages 130, 131

A Mobile Radio Relay Station, Popular Radio, August 1924, pages 132, 133

A Mobile Radio Relay Station, 134, 135. Popular Radio magazine, August, 1924.

Alfred H. Grebe and company with the WGMU mobile radio broadcaster.