Search Results for: Radio broadcast receivers
a single glass envelope. the inclusion of the passive components reduced the number of pins required to six, but to avoid them contaminating the vacuum, they are each sealed inside a glass tube. one of the reasons for the development of this amazing device was that in germany, there was a tax on receivers
based on the number of valves in the set, so in , loewe radio a.g introduced the nf, and also another multi-valve, the hf, which contained two screen-grid tetrodes, two resistors and a capacitor, intended for use as a two-stage rf amplifier. the original loewe multi-valves are masterpieces of glasswork...
http://www.electricstuff.co.uk/loewe.html