Category Archives: Basic Electronics Course

2A3 tube – 1931 magnavox concerto phonograph repair

A single-ended triode (SET) is a vacuum tube electronic amplifier that uses a single triode to produce an output. A typical triode audio power amplifier will have a driver that provides voltage gain, coupled to a triode (like 2A3 and 300B) or a pentode or kinkless tetrode such as EL34 Continue reading 2A3 tube – 1931 magnavox concerto phonograph repair

Technics RS-1500 Reel to Reel Tape Deck Bellows Repair

A new repair method applies to 90% of Technics Reel to Reel Decks. This unit is part of Ultimate series of recorders which sold extremely well because they were very good.
Also, because Technics advertised about them at length. And also because they do look as good as they do sound Continue reading Technics RS-1500 Reel to Reel Tape Deck Bellows Repair

McIntosh – MC-2105 “PRECISION FIDELITY STEREO AMPLIFIER”

The MC-2105 “PRECISION FIDELITY” amplifier was a game changer for MAC, delivering superior fidelity, reliability, and future serviceability… all housed in what is arguably the most beautiful amplifier package ever produced. The 2105 in fact would define Mac’s signature aesthetic – green back-lit logos, blue meters and black glass w Continue reading McIntosh – MC-2105 “PRECISION FIDELITY STEREO AMPLIFIER”

Pioneer Reciever Repair – SA 9100

Audio Amplifier Test and alignment. Troubleshooting and repair of a Pioneer SA 9100 amplifier. Why was the Wire cut??

Safety Tips for Working On Amplifiers
This device requires a high voltage to operate, this means you can get electrocuted, or burned. Do not place your hands or non-insulated tools in the amplifier Continue reading Pioneer Reciever Repair – SA 9100