Category Archives: Projects

1938 General Electric G-56 Repair

Posted on December 27, 2016 by jwk

From the Rain City Audio Repair Blog: Rain City Audio recently had the occasion to work on a 1938 GE radio, the model G-56. Since these are rather large floor model radios, the owner removed the chassis and speaker from … Continue reading →

Posted in Projects, Radio | Tagged , , , , , , | 2 Comments

Fisher 400 Wide-Band FM Multiplex Receiver Overhaul

Posted on August 16, 2016 by jwk

From Rain City Audio: The Fisher 400 is a very well engineered, and very collectible, vintage stereo receiver with an iconic champagne faceplate and prominent bank of controls. This one came through the shop after being stored in a garage … Continue reading →

Posted in Audio, Electronics, Projects, Radios and Tubes, Vintage | Tagged , , | 4 Comments

1934 RCA Victor T4-8A Bluetooth Upgrade

Posted on August 4, 2016 by jwk

From Rain City Audio: This was an interesting little project which came through the shop, a 1934 RCA Victor T4-8A cathedral radio. This radio had been fully restored, down to the bare metal of the chassis and completely re-wired by … Continue reading →

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1951 EMC 211 Service Tube Tester Refurbish

Posted on July 30, 2016 by jwk

From Rain City Audio: I don’t often work on test equipment, but sometimes I take a tube tester or similar for service. This one in particular is a 1951 EMC Model 211 tube tester, a quick and simple emissions tester … Continue reading →

Posted in Electronics, Projects, Test Equipment, Vintage | Tagged , , , , | 3 Comments

Dynaco ST-70 Stereo High Fidelity Tube Amplifier

Posted on April 30, 2016 by jwk

From Rain City Audio: I recently got to work on another vintage stereo kit, the Dynaco ST-70 amplifier. These were powerful, 35W per channel stereo amps typically using a pair of 6L6GC, EL34, or similar power tubes. This turned out … Continue reading →

Posted in Audio, Electronics, Projects | Tagged , , , , , | 2 Comments

Bose® 901 Series IV Active Equalizer #265335 Overhaul

Posted on April 28, 2016 by jwk

From Rain City Audio: This Bose® 901 Series IV Active Equalizer, #265335, just came through the shop for an overhaul. It’s owner bought this equalizer as a part of getting his Bose® system back up and running and sent it … Continue reading →

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Bose® 901 Series I Active Equalizer #9724 Overhaul and Upgrade

Posted on April 26, 2016 by jwk

From Rain City Audio: This rare early-production Bose® 901 Active Equalizer, serial #9724, came through the shop recently for an overhaul. It’s owner reported that both channels would cut out intermittently, the switches were noisy, and the power lamp was … Continue reading →

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Bose® 901 Series IV Active Equalizer #223227 Overhaul

Posted on April 24, 2016 by jwk

From Rain City Audio: This Series IV Active Equalizer, #223227, just came through for an overhaul. The owner reported it wasn’t making any sounds, just providing a DC offset on the output jacks which was giving his power amplifier some … Continue reading →

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Dynaco FM-3 High Fidelity Tuner Repair

Posted on April 22, 2016 by jwk

I recently got to work on a very interesting Dynaco FM tuner, the FM-3, which was in the shop for an overhaul. The owner reported it wasn’t working that well anymore, which isn’t a surprise given it’s age. These are good … Continue reading →

Posted in Audio, Electronics, Projects, Radio, Radios and Tubes, Stereo, Vintage | Tagged , , , , | 6 Comments

Bose® 901 Series I Active Equalizer #7790 Repair

Posted on April 20, 2016 by jwk

From Rain City Audio: This rare early-production Bose® 901 Series I Active Equalizer, serial #7790, came through the shop recently for an upgrade. It’s original owner bought this new in 1969 and kept it in use until it began to … Continue reading →

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