Tag Archives: capacitor replacement

Bose® 901 Series VI Active Equalizer #199732 Repaired

Posted on February 20, 2015 by jwk

Cross-posted from the Rain City Audio Repair Blog: A first for my shop, I recently worked on a Bose® 901 Series VI Active Equalizer! These are considerably newer than the Series I-IV that typically come through the shop, although they’re … Continue reading →

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Bose® 901 Series I Active Equalizer #55382 Refurbished [Repair Blog]

Posted on February 17, 2015 by jwk

Cross-posted from the Rain City Audio Repair Blog: Another Bose® 901 Series I Active Equalizer came through the shop recently for a full rebuild. These are all nearly 50 years old and are definitely showing their age, and this one … Continue reading →

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Harman-Kardon Citation 17S Pre-Amplifier Refurbishing

Posted on January 2, 2015 by jwk

Cross-posted from the Rain City Audio Repair Blog: I recently got to work on a Harman-Kardon Citation 17S pre-amplifier. Vintage HK gear is some of my favorite to work on: it’s robust, reliable, and built to be easy to service. … Continue reading →

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Bose 901 Series 1 Active Equalizer #46453 Repair

Posted on December 22, 2014 by jwk

Cross-posted from the Rain City Audio Repair Blog: Another Bose® 901 Series I Active Equalizer came through the ship, Serial #46453. It came in with a variety of issues, just not sounding like it used to, and the owner requested … Continue reading →

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Sony TA-5650 VFET Integrated Stereo Amplifier Overhaul

Posted on December 18, 2014 by jwk

Cross-posted from the Rain City Audio Repair Blog: I recently got to work on a very interesting piece of vintage stereo gear from the golden age of hi-fi in the ’70s, the Sony TA-5650 VFET Integrated Stereo Amplifier. It’s a … Continue reading →

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Bose® 901 Series IV Active Equalizer #116907 Overhaul

Posted on December 12, 2014 by jwk

Cross-posted from the Rain City Audio Repair Blog: Another Bose® 901 Series IV Active Equalizer came through the shop recently. It’s owner shipped it in without the wooden cover for security. This is a bad idea on the Series I/II, … Continue reading →

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Bose® 901 Series I Active Equalizer #33133 Overhaul and Upgrade by Rain City Audio

Posted on December 8, 2014 by jwk

Cross-posted from the Rain City Audio Repair Blog: Another Bose® 901 Series I Active Equalizer was through the shop lately, serial #33133. It came in working well enough on its original components for an overhaul and upgrade to ensure it … Continue reading →

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Bose 901 Series IV #244005 Repair by Rain City Audio

Posted on December 4, 2014 by jwk

Cross-posted from the Rain City Audio Repair Blog: Bose® 901 Series IV equalizers are coming through the shop more regularly in the past year. It’s expected as these are definitely getting up there in years. This one was sounding muddy … Continue reading →

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EICO Stereophonic Integrated Amplifier HF-81 Repair

Posted on November 7, 2014 by jwk

From the late ’50s, I had this nice example of an EICO HF-81 amplifier come through my shop. These are nice little stereo amplifiers with a built-in phono pre-amp and RIAA equalization and feature about 14W of power output per … Continue reading →

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Phase Linear 2000 Pre-Amp Overhaul

Posted on October 6, 2014 by jwk

Cross-posted from Rain City Audio: I had a Phase Linear 2000 through my shop lately. It was running okay, but had some pops and clicks and the controls weren’t all that smooth. Time for an overhaul before anything worse cropped … Continue reading →

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