Tag Archives: audio

Bose® 901 Series I Active Equalizer #6878 Repair

This early-production Bose® 901 Active Equalizer came through the shop recently for a repair. These Early models were the very first production run, back in 1968, and have a pretty significantly different circuit design from the later models, and feature … Continue reading

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Mailbag: Is The Bose 901 Equalizer Really Necessary?

I take questions from readers often, but they don’t always make it to a Mailbag segment. I’ve got this one a few times lately, though, so I figured I’d answer this one publicly. Jim from Ohio writes, I bought a … Continue reading

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Thrift Store Jamo MPA-101 Repaired – She’s Back Up and Running!

I started working on a Jamo MPA-101 amplifier back in August for a friend and after some early work it sat for a while. He’s re-doing his audio system at home so I spent a few hours to finish troubleshooting … Continue reading

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Magic Eye Tube Spectrum Analyzer

French hobbyist Sylvain came up with a fascinating project using 8 Magic Eye tubes from old equipment to make an audio spectrum analyzer. I’ve worked with magic eye tubes quite a few times, they’re very fascinating. Originally precursors to CRTs, they’ve found … Continue reading

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An interesting mystery disc discovered.

I stumbled across an interesting post over at Arcane Radio Trivia where the author discovered an old Home Recording Acetate, in bad shape, but still intact enough to recover some information. From around or before 1940, these “phonograms” were used to … Continue reading

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Buy the Album, Guys. [EVE 6 – Speak in Code: Audio Quality]

One of my favorite bands, EVE 6, recently got back together after a multi-year hiatus and put out a new album. “Speak in Code” came out a few weeks ago. I caught the band on their tour through Seattle just … Continue reading

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