The Mallory Radio Service Encyclopedia was published from 1936 to 1947, with the War years of 1942 to 1945 being a hiatus for the duration. The final issue was published in 1947

From the first edition:.
"For years it has been the Mallory-Yaxley pledge to retain leadership in furnishing constructive, helpful information, and assistance to the Radio Service Fraternity-and to make that information worthy of its confidence. In this, the first Radio Service Encyclopedia, there is ample evidence of this pledge."