Early Motorola "all transistor" AC operated clock radio

[Jeffhs]

Originally Posted by radiotvnut

I just bought this off of ebay and am waiting on it to arrive. It's a Motorola all transistor model CX27-G AC operated clock radio. I notice that it says "all transistor" instead of "solid state" and it still has "CD" markings on the dial. By it having "CD" markings, wouldn't that put it in the pre-'64 category?

Yes. The "CD" markings were to identify 640 and 1240 kHz (kc) on AM radio dials between 1953 and 1963. These frequencies were used at first by an emergency broadcasting network called Conelrad, which was formed in the early 1950s and lasted until, as you said, 1963-'64. Conelrad was replaced by the Emergency Broadcast System, which ran from 1964 until the end of the Cold War era. EBS was then replaced by today's Emergency Alert System, or EAS, in the mid-1990s. It is interesting to note, however, that most TV and radio stations still ran Conelrad tests as late as the early 1970s.