Category Archives: Vintage

Vintage Documentary: How Stereo Turntables Work

Posted on September 2, 2015 by jwk

Documentary Tube on YouTube has digitized an excellent early video documentary discussing the newest hi-fi invention of the time: stereo! In this 4-minute video, the narrator compares mono with stereo recordings on vinyl. Worth checking out!

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1963 Fisher FM-100-B Stereo FM Tuner Overhaul

Posted on August 9, 2015 by jwk

Cross-posted from the Rain City Audio repair blog: Something a bit unusual came through the shop recently, an old tube-type Fisher FM-100-B Stereo FM tuner. Anyone who knows classic tube audio knows Fisher, and the FM-100-B sure lives up to … Continue reading →

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Bose® 901 Series II #101043 Repaired

Posted on August 4, 2015 by jwk

Cross-posted from the Rain City Audio repair blog: Another Bose® 901 Series II Active Equalizer came into the shop recently for a full overhaul. These equalizers are getting pretty old and even if they power up and pass some sound, … Continue reading →

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The Hewlett-Packard 5451A Fourier Analyzer

Posted on July 27, 2015 by jwk

1972: the year launching the Space Shuttle program, the completion of the monument at Stone Mountain, Watergate, the first female FBI agents to join the force….and the new HP 5451A Fourier Analyzer, bringing unparalleled performance to the worlds of acoustic … Continue reading →

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Bose® 901 Series II #102678 Restoration

Posted on July 18, 2015 by jwk

Cross-posted from the Rain City Audio Repair Blog: Another Bose® Active Equalizer came through the shop, this one’s a Series II. The owner reported that one channel had failed and the switches were badly gummed up. Time for a rebuild! … Continue reading →

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1950s Motorola Modded Standalone Tube Amplifier Measurements

Posted on July 6, 2015 by jwk

Cross-posted from the Rain City Audio Repair Blog: Rain City Audio had an unusual project through the shop recently. It’s a Magnavox tube amp from the late 1950s. The owner brought it in reporting he’d purchased the amplifier, pulled from … Continue reading →

Posted in Audio, DIY, Electronics, Hi-Fi, Projects, Radios and Tubes, Vintage | Tagged , , | 3 Comments

Bose® 901 Series II Active Equalizer #117185 Overhaul

Posted on June 15, 2015 by jwk

From the Rain City Audio Repair Blog: Another Bose® 901 Series II Active Equalizer came through for an overhaul and some upgrades. These equalizers are necessary to provide the curve shaping needed to get the great sound the 901 Direct/Reflecting … Continue reading →

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Speakers of Craigslist: June 3rd, 2015

Posted on June 3, 2015 by jwk

It’s back – the Speakers of Craigslist, a periodic round-up of what’s interesting on my local Craigslist these days. Sorry for the hiatus, putting these together is a bit of work! As always, I am not affiliated with any of … Continue reading →

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Bose® 901 Series IV Active Equalizer #244305 Repaired

Posted on May 30, 2015 by jwk

Cross-posted from the Rain City Audio Repair Blog: Even the later series Bose® Active Equalizers are getting older, and the Series IV is coming up more and more. I just had another one through the shop, this one sent to … Continue reading →

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Marantz 2270 Stereophonic Receiver Overhaul and Adjustment

Posted on May 26, 2015 by jwk

Cross-posted from the Rain City Audio Repair Blog: I recently got to work on another iconic piece of hi-fi history, the Marantz 2270 stereo receiver. I’ve had this model through my shop before, as well as a couple of other … Continue reading →

Posted in Audio, Electronics, Hi-Fi, Projects, Stereo, Vintage | Tagged , , , , , | 3 Comments