Ads for The Mytronic Company 1957 in Cincinnati, Ohio

This ad for the National HRO-Sixty receiver appeared on the back cover of the OVARA "Ether Waves" magazine. Volume 6, No. 5, May 1957.

This ad for Hy-gain Communication Arrays appeared on the back cover of the OVARA "Ether Waves" magazine. Vol. 6, No. 7, July 1957.

Editor of Ether Waves magazine was Don Chesser W4KVX

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