In this letter to the editor, the author [a writer for Radio Club du Perche] comments on recent efforts to supply rural Ukrainians with portable radios. Comment on this or any article. Email [email ...

This article is intended to introduce the beginner to the interesting and challenging art of high frequency radio design. It is also intended to entice the seasoned professional to take a deeper look ...

Testing FM receivers is not that much different than testing other pieces of audio equipment. Appropriate tests include the big six: level, frequency response, THD+N, phase, interchannel crosstalk, ...

THE principles upon which radio receivers of various types are designed at the present time have been developed by various technical workers, who have in many cases specialized on particular ...

Marked: "Radio Receiver / Type CN-113-A / Serial no. 587 / 300m to 2500m / Made for Bureau of Steam / Engineering by National Electric / Supply Co., Washington, D.C. / Reg. No. 73 N.S.A. / Cont. No.

Marked: on panel: "Type 281 Short Wave Receiver / The Colin B. Kenney Co. / San Francisco." On nameplate: "The Colin B. Kennedy Co. / St. Louis--San Francisco / Licensed Under Armstrong / U.S. Patent ...