WebGE General Electric 217283 Tungar Bulb Guaranteed Free Shipping. $71.96. $89.95. Free shipping. Picture Information. Picture 1 of 7. Click to enlarge. ... Vintage Field Coil Speaker; Additional site navigation. About eBay; Announcements; Community; Security Center; Seller Center; Policies; Affiliates; Help & Contact; WebDec 17, 2024 · And the magnetic field of the field coil must be as smooth and noise free as possible. I think that any field coil speaker manufacturer should also sell an extremely good variable DC power supply that are made specifically for the speakers. This increases the cost of course, but that is the way it is. People should not be left scrambling to ...
BR-9 amplifier questions - Gibson Brands Forums
WebOct 13, 2010 · I removed the radio chassis (mostly junk save for some 6J5 tubes), the later-added GE RIAA phono pre (sold on eBay), the 25 watt amplifier chassis (salvaged the tubes, output and phase-inverter transformers), and two 12″ Magnavox field-coil speakers. WebJul 18, 2024 · This is a speaker that has a coil of wire that connects to the radio's power supply to create the magnetic field, generally known as the field coil. Modern speakers use a permanent magnet. The field coil is the big coil on the back of the speaker. The device on the side of the frame is the output transformer which sends the audio signal to the ... do product managers make more than engineers
Field coil speakers: obsolete or the future? - EDN
WebA direct current through this coil provided the magnetic field for the speaker. In household radios and phonographs, the power supply current for the vacuum tube circuit of the unit passed through the speaker's … WebComponents as marked: (1) Antenna coils; (2) IF transformers; (3) oscillator coils; (4) filter choke; (5) field coil; and (6) output transformer. After pulling the chassis and speaker from the cabinet, the first step is to remove the … WebSep 18, 2024 · Team--I had a custom pair of high efficiency field coil open baffle speakers built...full range with augmenting super tweeters and woofers. I'm using DSP to crossover the Supravox 400 EXC woofers at about 100 and its measuring well and sounding great. do product owner attend daily stand up