SerTech Electronics is a San Jose repair shop with over 30 years of experience servicing audio and electronic equipment. The shop handles a wide range of amp repair, including tube amp repair and restoration, making it a solid destination for guitarists dealing with ailing combo amps, heads, or vintage tube gear. All guitar amps are listed among their supported equipment, and their experience with tube equipment suggests they are comfortable working on the finicky circuitry that high-gain and vintage players depend on.

Beyond guitar amplifier repair, SerTech takes on receivers, tuners, equalizers, turntables, cassette decks, and reel-to-reel machines, reflecting the kind of broad electronics repair expertise that tends to translate well to complex amp work. They also handle speaker repair, including reconing, new surrounds, and driver replacement, which is useful for guitarists needing cabinet work alongside amplifier service.

The shop carries used stereo gear and speakers for sale and accepts consignments. SerTech advertises guaranteed work and notes a number one customer rating, with Nakamichi and McIntosh repair called out as areas of specialty.