Monthly Archives: July 2016

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

Bose® 901 Series II #114658 Repair

Posted on July 26, 2016 by jwk

From Rain City Audio: This Bose® 901 Series II Active Equalizer, #114658, just came through the shop for repair. It had stopped performing the proper equalizer functions, and so was time for an overhaul. Inside, it looks like the smaller … Continue reading →

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Sony TA-2000F Preamp Overhaul

Posted on July 22, 2016 by jwk

From Rain City Audio: This venerable Sony preamp was seen at Rain City Audio last September 2015 when it came in for an evaluation. That check-up revealed a clean bill of health at the time, but over the past several … Continue reading →

Posted in Audio | Tagged , , , | 4 Comments

Bad Caps in Everything

Posted on July 20, 2016 by jwk

I just had a bit of a scare with my Audio Precision analyzer. The 2004-era Dell OptiPlex GX270 which drives the AP hardware decided it would refuse to power up – just flashing the “ON” light for a fraction of … Continue reading →

Posted in Computers, DIY, Electronics, Test Equipment | Tagged , , , , | 3 Comments

Bose® 901 Series II #71033 Overhaul

Posted on July 18, 2016 by jwk

From Rain City Audio: This Bose® 901 Series II Active Equalizer, #71033, came into the shop for an overhaul recently. It was showing some signs of age, in this case, a bad left channel. Nothing Rain City Audio can’t fix! This … Continue reading →

Posted in Audio, Bose, Electronics, Stereo, Vintage | Tagged , , , | Leave a comment

1967 Sony TFM-116L Transistor Radio Repair

Posted on July 14, 2016 by jwk

From Rain City Audio: This cute little Sony 11-transistor portable AM/FM radio, the TFM-116L, recently came through the shop. It’s owner purchased it new back in 1967 while he was stationed overseas with the armed forces, and had been listening … Continue reading →

Posted in Audio, Electronics, Radios and Tubes, Vintage | Tagged , , , | 1 Comment

1937 Admiral 488 Radio Dial Belt Repair

Posted on July 10, 2016 by jwk

From Rain City Audio: Most tube radio repairs at Rain City Audio are full overhauls, but occasionally there’s something that’s just in for minor maintenance, like this Admiral AM 488 from 1937. This radio was fully restored in exacting detail … Continue reading →

Posted in Radios and Tubes, Vintage | Tagged , | 1 Comment

Bose® 901 Series IV Active Equalizer #509052

Posted on July 6, 2016 by jwk

From Rain City Audio: This Bose® 901 Series IV Active Equalizer, #509052, was just purchased and sent to Rain City Audio for an overhaul. This unit was originally a 220V model but had already been converted to 110V on a … Continue reading →

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

Mercury Switch Find

Posted on July 5, 2016 by jwk

Digging through a seldom-used parts bin, I made a cool discovery: a set of four mercury switches, still intact: These are used as tilt and vibration sensors in mechanical systems. They’re heavy from the mercury inside, and it sloshes around … Continue reading →

Posted in DIY, Gadgets | Tagged | 3 Comments

Phase Linear 2000 Upgrade and Overhaul

Posted on July 3, 2016 by jwk

From the Rain City Audio Repair Blog: I recently got to work on another Phase Linear 2000 pre-amp. These well regarded components are a fantastic part of any stereo system with their high output rating, multitude of inputs and outputs, … Continue reading →

Posted in Audio, Electronics, Hi-Fi, Stereo, Vintage | Tagged , , , , | 1 Comment