Category Archives: Electronics

1977 Yamaha CR-2020 Vintage Stereo Receiver Repair

Posted on January 26, 2014 by retrovoltage

The Yamaha CR-2020 drives 120W/channel into an 8 ohm load and supports 3 pairs of speakers (but only plays 1 or 2 pairs a time), dual phono inputs supporting both moving magnet (MM) and moving coil (MC) pick-ups, tape-copy functionality … Continue reading →

Posted in Audio, Electronics, Hi-Fi, Music, Stereo, Vintage | Tagged , , , , , , , , , , , , , , | 34 Comments

1948 Motorola 99-FM21 Console Radio Back to Life

Posted on December 23, 2013 by retrovoltage

I recently had the chance to work on this beautiful Motorola 99-FM21 from 1948, currently owned by the granddaughter of its original owner. It’s been in the family since its purchase new in 1948 and was lovingly cared for the … Continue reading →

Posted in Electronics, Projects, Radios and Tubes, Vintage | Tagged , , , , , , , , , , , , , , , , , , , | Leave a comment

JVC XV-S60 DVD Player Repair

Posted on December 17, 2013 by retrovoltage

A local gentleman brought in his JVC DVD player, model XV-S60, for repairs. It’s a high end unit from around 2001 with some sentimental significance and despite it being a fair bit outside my normal interest, I decided to take … Continue reading →

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1936 Zenith 5-S-29 Repair with Dial Face Replacement

Posted on December 12, 2013 by retrovoltage

I recently had the privilege of working on this beautiful 1936 Zenith 5-S-29 tabletop radio. It’s a beautiful 5-tube table radio with a 6-inch speaker and the iconic black Zenith dial and lightning bolt Z pointer. This one is special, … Continue reading →

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Bose 901 Series I Active Equalizer #50911 Repaired

Posted on December 3, 2013 by retrovoltage

Looking for the latest info on repairing your Bose 901 Series I, Series II, or Bose 800 Active Equalizer and speaker system? Take a look at the latest in-depth guide with everything you need to know (and more!) I recently … Continue reading →

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1936 GE Model A-52 Antique Radio Repaired!

Posted on November 22, 2013 by retrovoltage

A change of pace from the Bose equalizers and hi-fi I’ve been working on a lot of lately, I had the pleasure of working on a 1936 GE Model A-52 antique radio. This is a nicely designed and straightforward table … Continue reading →

Posted in DIY, Electronics, Projects, Radios and Tubes, Vintage | Tagged , , , , , , , , , , , , , , , | Leave a comment

1954 Philips 778-2 Canadian Antique Radio Repair

Posted on October 24, 2013 by retrovoltage

I was lucky enough to get to work on a beautiful 1954 Philips 778-2 radio console. It had been moved around and played for a while but eventually ended up giving only buzzing instead of audio output. I’m surprised it … Continue reading →

Posted in Electronics, Projects, Radios and Tubes, Vintage | Tagged , , , , , , , , , , , , , , | 16 Comments

Evidence of Past Repairs

Posted on September 16, 2013 by retrovoltage

It’s always interesting to see what’s happened with equipment that’s been worked on previously. It’s often a mixed bag with some great repair jobs, some that have a lot of room for improvement, and some that really just don’t measure … Continue reading →

Posted in Collections, Commentary, DIY, Electronics | Tagged , , , , , , , , , , | 1 Comment

KN0CK HF Converter Rev. 4 is Released!

Posted on July 25, 2013 by retrovoltage

The complete Rev 3 KN0CK HF Converter has sold out and been discontinued. That’s okay, though, because it’s been replaced with the KN0CK RTLSDR for HF Revision 4! This model incorporates a lot of the feedback from the community about the … Continue reading →

Posted in DIY, Electronics, Gadgets, Radio, Technology | Tagged , , , , , , , , , , , , , | 1 Comment

Overloaded 1931 Transformer [Fried Electronics]

Posted on June 7, 2013 by retrovoltage

I’m working on a 1930/31 Westinghouse WR-8 Columnaire clock-radio which had a bad transformer. The filter capacitors failed and shorted the high-voltage secondary, burning it open and causing a lot of heat and melting.   The replacement is a General … Continue reading →

Posted in DIY, Electronics, Projects, Radio, Vintage | Tagged , , , , , , , , | 3 Comments