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.

Dynaco PAT-5 Gallery

The Dynaco PAT-5 preamplifier. You can check out the specs here.

If you have a Dynaco PAT-5 amplifier that is in need of repair, call us at (519)513-1084, or email your enquiry to repairs@dnaelectronics.ca.

The Dynaco PAT-5 preamplifier before restoration.

The power supply.

The long input selector switch can be seen running from left to right below the centre of this picture.

The faceplate before being cleaned-up.

The input selector switch knob (on the left) and the speaker selector switch knob (on the right) are not original. A couple knobs were missing, as can be seen in the first picture. However, we managed to find two knobs that matched the others reasonably well. Although this preamp really did clean up nicely, I have to admit the camera flash enhanced the brilliance of this picture somewhat.

The recapped power supply board. We managed to find some high-quality, long-life axial capacitors to replace the originals.

Sponsored Link

During the 1960's and 70's, Dynaco was a manufacturer of high-quality audio power amplifiers, preamplifiers, and tuners. Dynaco tube amplifiers are popular with many audiophiles.

Although the PAT-5 has a power switch, it is never really off! The power switch just controls the switched AC receptacles on the rear panel. I guess they expected the user to plug the power amplifier into the switched outlets. In the instruction manual, Dynaco claims that leaving the preamplifier powered at all times (you have no choice, unless you pull the power plug out of the receptacle) increases the life-expectancy of the internal components. I am highly skeptical of that. The original power supply capacitors in this preamplifier were in particularly bad condition.

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!