S. E. Catalogue 9 "Amrad" Detector Catalogue No. 49 Marconi Valve Mount The "Amrad" Detector here illus- Catalogue No. 229 trated is a remarkable example of com- pactness and efficiency. The crystal Murdock Condenser Employing the Marconi method of cup is protected by a screw-on case. mounting… … Vario-coupler The Two-crystal Detector here illus- trated is now supplied mounted on a Catalogue No. 239 neat black composition base. "Amrad" Variometer Audio-frequency Transformer Ampliformer Catalogue No. 240 Catalogue No. 186 Catalogue No. 7 This Basket- wound Variometer is fully A well-designed…
Radio
Internet Archive · Fisher - University of Toronto · Public domain (published before 1931). Free to use for anything.
