File:KBRC AM radio antenna tower.JPG - Wikipedia

KNBR Radio, San Francisco

What is the purpose of guy wires for an antenna or tower structure? - Quora

August, 2019, The SWLing Post

Communications World 1980, PDF, Am Broadcasting

US Tower MARB-40 Free Standing Rotor Base with MA-40 Tubular tower by by K2MK

Why did only WTC's North Tower have an antenna? - Quora

WKCR-FM - Wikipedia

Why did only one of the WTC Towers have the huge antenna? - Quora

Communications World 1980, PDF, Am Broadcasting

KCUR is replacing our transmitter antenna. Here's what that means and how it will affect your radio