Tag Archives: photos

What’s On Your Workbench?

Posted on December 20, 2015 by

People ask me what kind of gear I use at Retrovoltage and at Rain City Audio for projects. So, here we go: While it’s by no means the best-equipped workbench out there, it has a good mix of lab- and service-grade … Continue reading →

Posted in Collections, Commentary, Test Equipment | Tagged , , , , , , , , , , | 6 Comments

Harman/Kardon Control Amplifier A-401 Restoration

Posted on November 19, 2014 by

This little Harman/Kardon Control Amplifier, model A-401, just came through the shop for a full overhaul. It was in a pretty sorry state to begin with – one channel distorted, one barely gasping for air, and a world of scratchy … Continue reading →

Posted in Audio, Electronics, Hi-Fi, Projects, Stereo, Vintage | Tagged , , , , , , , , , , , , , | 4 Comments

Vintage Engineering is Beautiful

Posted on September 22, 2014 by

Varistor from Harmony H500 Guitar Amplifier

Posted in Collections, Photos, Vintage | Tagged , , , , , | 1 Comment

Vintage Engineering is Beautiful

Posted on September 13, 2014 by

1931 Radiola 82 IF Transformer. Hand-wound coils on a wooden coil form.

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Bose 901 Series II Active Equalizer #67402 Repair

Posted on August 25, 2014 by

This equalizer got a full overhaul with new 1% precision resistors, electrolytic capacitors, audiophile-grade output capacitors, transistors, gold-plated RCA jacks, 4% silver solder for all connections, a thorough switch cleaning, and computerized frequency response testing and a listening burn-in to verify proper operation. It sounds just fantastic with a very dynamic and life-like presence that really draws you into the experience of the source material, just like the Bose 901 should.

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Check it out at Rain City Audio Continue reading →

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New Toy: Tektronix 575 Transistor-Curve Tracer (Restoration Project)

Posted on August 11, 2014 by

I picked up a new shop toy just the other day, a Tektronix 575 Transistor-Curve Tracer. This is a piece of lab gear I’ll use to match transistors for their operating characteristics, and can also be used to analyze and … Continue reading →

Posted in Electronics, Gadgets, Projects, Vintage | Tagged , , , , , | 5 Comments

Close-Up of a Magic Eye

Posted on August 7, 2014 by
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