50th Anniversary CK722 Radio

BUILD YOUR OWN WORKING HISTORIC CK722 RADIO

 

PROJECT DETAILS

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PROJECT DETAILS

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The first widely published CK722 project appeared in the February 1953 issue of the Radio and TV News magazine. Shown on the left is a scan of a section of the first page of this historic article it shows the front panel and side view of this first CK722 radio project. The radio was designed and constructed by Mr. Robert Dixon, who was an employee of the Raytheon Receiving Tube Division at the time. A sidebar in the article noted that CK722 transistors were recently available from Raytheon for $7.60 each

 

The middle photo on the left is a rendition of a young experimenter enjoying his newly assembled Lafayette KT-68 CK722 radio kit, which was sold in the 1956 T4-56 Lafayette Radio catalogue for $11.80, including two CK722 transistors, in a high performing regenerative circuit. The Lafayette Radio company was a well known supplier of electronics to hobbyists in the 1950s and 1960s.

 

The bottom scan on the left is an ad from the 1957 Federated Electronics catalog, offering a completed transistorized radio kit for only $8.95. This radio used two CK722 style transistors in a simple circuit with few components. According to Mr. Andrew Valentino, the creator of this radio, as many as 25,000 of these units were sold.

 

50th Anniversary CK722 Radio

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50 YEARS of the CK722

A New Volume of Projects Featuring the Most Famous Transistor Ever Made

COPYRIGHT 2003 by Jack Ward. All Rights Reserved. http://www.ck722.com