Search Results for: Amplifier sets
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
whole device becomes useless, but to counter this disadvantage, loewe offered a repair service to replace failed filaments. loewe later developed a more sophisticated multi-valve, the wg , which was enclosed in a metal shield, containing two variable-mu pentodes and a triode, used respectively as rf amplifier...
http://www.electricstuff.co.uk/loewe.html