Category Archives: Projects

Harman-Kardon Citation 11 Pre-Amp Overhaul

Posted on November 11, 2015 by jwk

From the Rain City Audio Repair Blog: A local customer brought me his brother’s Citation 11 for a full overhaul. After a few decades of faithful stereo reproduction, then a number of years in storage, it was time for an overhaul to … Continue reading →

Posted in Audio, Electronics, Projects, Stereo, Vintage | Tagged , , , , | 15 Comments

Bose® 901 Series I Active Equalizer #48344 Repaired

Posted on November 4, 2015 by jwk

From the Rain City Audio Repair Blog: Another classic Bose® Active Equalizer came through the shop recently for a standard overhaul from sunny California. It’s owner reported that it was performing poorly and channels would cut out. Sounds like a … Continue reading →

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1937 Zenith 5-S-126 Tune-Up

Posted on October 30, 2015 by jwk

From the Rain City Audio Repair Blog: This very nice Zenith 5-S-126 came through the shop a little while ago. It was originally purchased by a local collector from eBay already restored and playing, and served well for a couple … Continue reading →

Posted in Audio, Bose, Projects | Tagged , , , , , | 6 Comments

Creek 4140 S2 Overhaul and Voltage Conversion

Posted on August 23, 2015 by jwk

From the Rain City Audio Repair Blog: This Creek 4140 S2 amplifier is a bit newer than most through the shop, although it’s getting up there. This particular one was constructed in 1989, and came via eBay from the UK … Continue reading →

Posted in Audio, Electronics, Projects | Tagged , , , | 1 Comment

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 →

Posted in Audio, Bose, Electronics, Projects, Vintage | Tagged , , , | 3 Comments

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 VI Active Equalizer #179043 Repair

Posted on June 29, 2015 by jwk

Cross-posted from the Rain City Audio Repair Blog: Series VI Active Equalizers are the newest of the set and is on it’s second revision of production even today. Even still, the earliest ones are from the 1990s, and that’s getting … Continue reading →

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Bose® 901 Series V Active Equalizer #130806 Repaired

Posted on June 24, 2015 by jwk

Cross-posted from the Rain City Audio Repair Blog: More and more, even the newer generation Bose® Active Equalizers are showing signs of age. Series V and VI have been making appearances here and there, but seem to have picked up quite … Continue reading →

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1974 Sony STR-6200F Receiver Overhaul and Alignment

Posted on June 19, 2015 by jwk

From the Rain City Audio Repair Blog: I recently got to work on a pretty big, fairly rare Sony receiver from 1973-74: the STR-6200F. It’s a powerful receiver featuring 60W per channel of power available, with quite a few inputs … Continue reading →

Posted in Audio, Electronics, Hi-Fi, Projects | Tagged , , , , , , , , | 4 Comments