Monthly Archives: September 2014

New Toy: HP 130C Oscilloscope

I’ve been looking for a nice balanced input oscilloscope to use as a bench audio scope for a bit, and I do enjoy some vintage test equipment…so I recently ended up with an HP 130C oscilloscope. This early ’60s tube … Continue reading

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Steampunk USB Vacuum Tube Flash Drives

I ran across these very cool steampunk-inspired USB flash drives drives built around a vacuum tube while looking for some tube shields. They look like they’re really well built and are a clever use of an old vacuum tube. I … Continue reading

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Sony TA-4650 VFET Stereo Integrated Amplifier Check-Up

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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NordeMende Globetraveler 7/601 Rebuild

This repair is cross-posted from Rain City Audio: This rare and valuable example of late 1960s German engineering came through my shop recently, the NordeMende Globetraveler 7/601. Marketed as the Globetrotter in Europe, RCA already marketed a radio called the … Continue reading

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Vintage Engineering is Beautiful

Varistor from Harmony H500 Guitar Amplifier

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Test Equipment Round-Up – September 20th, 2014

I always keep an eye on eBay for plug-ins for my HP 143 oscilloscope and even if they don’t turn up, it’s always interesting to see what else is in the category. Some of these are pretty interesting – there’s definitely … Continue reading

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Marantz 2245 Stereophonic Receiver Rebuild

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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Getting Started With Vintage Radio and Electronics: Basic Tools for the Hobbyist

A few people have asked me variations of  “What tools do I need to fix my first radio?”, “What do I need to put together this soldering kit?”, and such. It’s not as simple as you might think. There’s a … Continue reading

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New Toy: LogiMetrics 921A RF Signal Generator – Refurbished by KISS Electronics

I just had an unexpected run-in with Murphy’s Law and found myself needing a modulated signal generator in short order. Bad news when my modulated signal generators decided to die right when I went to perform an alignment! My Leader Standard … Continue reading

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With T-Mobile, Old is New Again

Right on the heels of the launch of the new iPhone 6, T-Mobile announced another round of initiatives to attract new customers and improve their service. And let me tell you, it really is pretty revolutionary: free WiFi calling and … Continue reading

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