Tag Archives: repair

Harmony H500 Solid State Guitar Amplifier Repair

Posted on October 10, 2014 by jwk

And now for something a little different, this time it’s a vintage guitar amplifier: the Harmony H500. The owner sent it to the shop out of the cabinet to be serviced since it quit putting out any sound. It’s a … Continue reading →

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Sony TA-4650 VFET Stereo Integrated Amplifier Check-Up

Posted on September 24, 2014 by jwk

This repair cross-posted from Rain City Audio: I recently had this Sony TA-4650 in the shop for a check-up. It was reportedly giving static in one channel. That’s trouble on an amp like this – Sony used an ambitious new technology, the VFET, a … Continue reading →

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Marantz 2245 Stereophonic Receiver Rebuild

Posted on September 19, 2014 by jwk

An iconic piece of kit from the golden age of hi fi just came through my shop: the Marantz 2245 Stereophonic Receiver. This fantastic receiver is in pretty good cosmetic shape, but its owner reported that it started acting up – it’d take … Continue reading →

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Bose 901 Series II Active Equalizer #103549

Posted on July 10, 2014 by jwk

This Bose® 901 Series II Active Equalizer is a part of Rain City Audio’s parts stock and got a full rebuild with upgraded parts and complete and comprehensive testing. All transistors, resistors, film and electrolytic capacitors were replaced, a new neon bulb added, and the controls cleaned and lubricated. This very detailed repair walkthrough has photos showing the drifted carbon composition resistors which can throw off the equalizer’s curve even if all the capacitors have been replaced. Click through for many more photos!

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Bose 901 Series II Active Equalizer #114743 Repair

Posted on June 26, 2014 by jwk

This Bose 901 Series II Active Equalizer got a full overhaul in the shop with all new capacitors, resistors, transistors and silicon diodes. After a thorough control cleaning, it sounds absolutely fantastic once again and should last for a long time to come.

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1936 Zenith 5-S-29 Electrical Restoration and Alignment

Posted on June 20, 2014 by jwk

This 1936 Zenith 5-S-29 was in the shop for a complete overhaul with all new resistors and capacitors, a new dial lamp socket, tube testing and alignment. After all that service, it looks and sounds fantastic and is going to last for a long time to come in a local collection.

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Bose 901 Series I Active Equalizer #41550 Repair

Posted on June 18, 2014 by jwk

This Bose 901 Series I Active Equalizer, serial #41550, came into my shop in need of an overhaul after being stored somewhere sticky for many years. After a rebuild and thorough control cleaning with high powered solvents, this equalizer performs good as new! All new capacitors, resistors, transistors and neon bulb will last for a long time to come.

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1937 Detrola 139E Vintage Radio Repair

Posted on May 30, 2014 by jwk

I just finished a new project over at Rain City Audio – 1937 Detrola 139E Vintage Radio Repair

This Detrola 139E chassis was on my bench recently while the cabinet was being refinished. It’s a striking 1937 radio with an art deco stationized dial with a very large tuning area, and even though it only has 5 radio tubes, it’s a great performer. I replaced the rectifier tube and rebuilt the electronics of the radio followed by testing and an alignment; now it’s very selective and will be a safe and reliable appliance for someone’s home.

Check it out at http://www.raincityaudio.us/blog/1937-detrola-139e-vintage-radio-repair! Continue reading →

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1938 Zenith 7-S-363 Repair

Posted on May 12, 2014 by jwk

I just finished a new project over at Rain City Audio – 1938 Zenith 7-S-363 Repair

This Zenith radio was brought in by its second owner after original parts catastrophically failed. It took a while, but after an extensive electrical overhaul and locating some replacement parts, it looks and sounds fantastic and will play beautiful music for many years to come. “Zenith, the quality goes in, before the name goes on.”

Check it out at http://www.raincityaudio.us/blog/1938-zenith-7-s-363-repair! Continue reading →

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1950 Crosley 10-139 Vintage Radio Repair

Posted on May 5, 2014 by jwk

I just finished a new project over at Rain City Audio – 1950 Crosley 10-139 Vintage Radio Repair

This classic 1950s All American Five, the Crosley 10-139 just came through the shop. It was an estate sale find that had some damage from careless handling, but despite a rough past it fixed up nicely and will do a great job bringing in the Mariners games and oldie’s radio for many years to come.

Check it out at http://www.raincityaudio.us/blog/1950-crosley-10-139-vintage-radio-repair! Continue reading →

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