The radio enthusiast magazine Monitoring Times ceased publication on December, 2013 after thirty-three years of continuous magazine production. Bob Grove, the long-time owner/operator of the title, ended up closing the business when he retired in 2014. There was still enough interest in the magazine that a new replacement began publication almost immediately, even going so far as to advertise in the last issue of the Monitoring Times.

The Spectrum Monitor's first issue was in January of 2014 and covered many of the topics and general interest information that had kept Monitoring Times going. Ken Reitz, the former managing editor of the Monitoring Times, was the new owner and publisher of the Spectrum Monitor.

Both magazines included listings of thousands of show times and frequencies of niche and eclectic interest radio programs from most countries.