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Bose® 901 Series I Active Equalizer #7790 Repair
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...
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Dynaco FM-3 High Fidelity Tuner Repair
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...
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Bose® 901 Series IV Active Equalizer #223227 Overhaul
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...
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Bose® 901 Series I Active Equalizer #9724 Overhaul and Upgrade
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...
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Bose® 901 Series IV Active Equalizer #265335 Overhaul
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...
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Dynaco ST-70 Stereo High Fidelity Tube Amplifier
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...
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1951 EMC 211 Service Tube Tester Refurbish
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...
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1934 RCA Victor T4-8A Bluetooth Upgrade
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...
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Fisher 400 Wide-Band FM Multiplex Receiver Overhaul
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...
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1938 General Electric G-56 Repair
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...
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