Original January 1940 issue of Service, a monthly digest of radio and allied maintenance. Features early radio and television servicing information, technical circuits, vacuum-tube data, broadcast-station material, and period advertising, including a striking RCA “Signalyst” test-equipment advertisement. This pre-WWII issue shows significant age-related staining, cover wear, surface loss, and edge wear while retaining strong vintage character.
Original January 1940 issue of Service, a monthly digest of radio and allied maintenance. Features early radio and television servicing information, technical circuits, vacuum-tube data, broadcast-station material, and period advertising, including a striking RCA “Signalyst” test-equipment advertisement. This pre-WWII issue shows significant age-related staining, cover wear, surface loss, and edge wear while retaining strong vintage character.
