I recently repaired this Rogue Audio Sphinx hybrid valve / class-D integrated amplifier. The repair also reminded me of a valuable lesson in always checking the obvious! The Rogue Audio Sphinx is a nicely made amplifier, hand-built in the USA which is a good thing. The amplifier features an unusual topology, consisting of a tube preamplifier, […]
Just a short post while I am repairing/restoring an absolutely massive Marantz PM-8 integrated amplifier. These main filter capacitors in the Marantz PM-8 sit in the power supply and do all the ‘heavy lifting’ required to make the power supply smooth and quiet. All four 15,000uF capacitors have literally spewed their contents all over the
Come with me as I repair this amazing Balanced Audio Technology BAT VK-500 MOSFET power amplifier. Technically speaking, the BAT VK-500 MOSFET amplifier is an amazing design. It uses only MOSFET devices in the driver and output stages and a large bank of smaller, paralleled filter capacitors to create power supply rails of exceptionally low
Recently, two friends with lovely vintage Yamaha CA-610 and CA-710 integrated amplifiers sought my assistance to have them repaired. One was dead, the other was not working well. The Yamaha CA-710 had blown one channel. One of the original output devices, a Sanken 2SA745, had a collector to base short and it had taken out
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I’m lucky to have great customers, it makes my job such a pleasure. But every once in a while, someone takes the time to share their thoughts in the form of written or verbal feedback about work I’ve completed for them. Positive feedback like this from my customers makes me incredibly proud of the work I
I’ve just finished servicing yet another interesting and unusual direct drive deck – a JVC JL-F45 – what a cool machine! I was surprised by the weight and overall build quality of this lovely direct-drive turntable. The JVC JL-F45 is a fully automatic direct-drive deck. For those who don’t know, fully automatic means that the tonearm
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The Pioneer PL-A35 is one of those rare belt-driven Japanese turntables that most have never seen. I’ve repaired a number of such unusual decks in the last 12 months or so, but this is definitely one of the nicest and in some ways, the most unusual. According to Pioneer: The PL-A35 combines studio-quality performance with the
