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The 32-volt system could also power other specially made appliances as well as electric lights around the farm. Other farm radios, especially from the late 1930s to the 1950s, reverted to using a large "A-B" dry cell that provided both 90 V for the tube plates and 1.5 V for the tube filaments, as did most tube-based portable radios of that era.
Repair and restoration of vintage amateur radio equipment may involve replacing vacuum tubes, reforming electrolytic capacitors if needed, replacing any faulty resistors, replacing two-wire power cords with three-wire cords except on transformerless AC/DC radios, and receiver alignment as necessary.
The rocket radio was also used as an emergency radio, because it did not require batteries or an AC outlet. The rocket radio was available in several rocket styles, as well as other styles that featured the same basic circuit. [38] Transistor radios had become available at the time, but were expensive. Once those radios dropped in price, the ...
Lafayette's products ranged from individual resistors, capacitors, and components to stereos and two-way radios for amateur radio, CBers, and shortwave listeners. Many were dedicated types with special functions, such as VHF receivers for police and fire channels built into a CB radio.
The term All American Five (abbreviated AA5) is a colloquial name for mass-produced, superheterodyne radio receivers that used five vacuum tubes in their design. These radio sets were designed to receive amplitude modulation (AM) broadcasts in the medium wave band, and were manufactured in the United States from the mid-1930s until the early 1960s.
Tubes used in AC-powered radio receivers of the early 1930s 2A3 – Directly heated power triode, used for AF output stages in 1930s–1940s audio amplifiers and radios. 2A5 – Power Pentode (Except for heater, electronically identical to types 42 and 6F6 )
Old style "dog bone" resistors with "body, tip, dot" color code marking Three carbon composition resistors in a 1960s valve (vacuum tube) radio. Carbon composition resistors (CCR) consist of a solid cylindrical resistive element with embedded wire leads or metal end caps to which the lead wires are attached.
TM triode. Drawing from the 1915 Peri and Biguet patent. The TM (from French: Telegraphie Militaire, also marketed as TM Fotos and TM Metal) was a triode vacuum tube for amplification and demodulation of radio signals, manufactured in France from November 1915 to around 1935.
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