Affordable, Quality Audio Repairs & Restorations

Phone: 519-513-1084

Email: repairs@dnaelectronics.ca

Address: 15 Shaftsbury Dr. Kitchener, ON, Canada

Quality, Reliable Restorations by Experienced Father & Son Technicians. We Take Pride in our Workmanship.

Receivers | Power Amplifiers | Integrated Amplifiers | Preamplifiers | Tuners

D 'n A Topics & Resources

Restoration Information

General information about our restoration work, and pricing information for various models.

Audio Specifications Database

We are compiling a database of audio equipment specifications gleaned from our annual equipment directory magazines, owner's manuals, service manuals, etc.

Audio Picture Gallery

Pictures of some of the equipment we've worked on, with occasional commentary.

Our Testing Procedures

We test the audio components we restore to ensure they perform at least as well as expected. This is both an overview of our measuring procedures, and an attempt to make clear exactly what is being measured.

FAQ

Answers to some frequently asked questions.

Sansui BA-3000 Gallery

Sansui's excellent BA-3000 power amp. You can peruse the specs here.

If you have a Sansui BA-3000 power amplifier that is in need of repair, call us at (519)513-1084, or email your enquiry to repairs@dnaelectronics.ca.

The power supply PCB. The top relay is the speaker protector, the lower relay is the soft-start switch.

The toroidal power transformer and 22000 uF 80V main filter capacitors.

The heatsinks that carry the output transistors. It is a fully-complementary output arrangement; six output transistors per channel.

The pre-driver modules in stock condition.

The rebuilt pre-driver modules. The picture does not clearly show it, but most of the front-end resistors were replaced with metal-film devices.

To ensure continuity, we soldered directly to the circuit trace the nuts that fasten the pre-driver transistors.

This is what can happen when you rely on a screw for continuity. The picture shows the main power supply rectifiers. Note the arcing that has occurred around the top screw and bottom screw in the picture. Ultimately, we soldered the heads of the screws directly to the rectifier bodies.

Bottom view of the same rectifiers. Note that the arcing also occurred on the bottom of the PCB. Like with the pre-driver transistors, we soldered the nuts to the copper trace. This is not unusual for Sansui amps. We have seen the same phenomenon in Sansui AU-20000 amps.

The heatsink assembly for one channel.

Sponsored Link

Sansui was a premier manufacturer of high-end audio components that arguably peaked in the mid 1970's. Sansui power amplifiers, integrated amplifiers, receivers, tuners, loudspeakers, etc., are coveted by audiophiles today.

The Sansui BA-3000 amplifier (cover removed).

D 'n A Electronics is a Father & Son business located in Kitchener, Ontario, Canada. We specialize in restoring hi-fidelity audio power amplifiers, integrated amplifiers, preamplifiers, receivers, and tuners. We've been repairing vintage audio equipment since long before it was considered vintage! It is our goal, and pleasure, to reliably restore hi-fi audio equipment to original operating condition (or better!). We accept shipments from across Canada, and many customers from Kitchener, Waterloo, Cambridge, Guelph, Hamilton, London, Toronto and surrounding areas find us to be within convenient driving distance. Thank-you for visiting our website, we look forward to serving you!