Ad Type:

For Sale

Used

AUDIO RESEARCH & CONRAD JOHNSON PREAMPLIFIER REPAIRS

Brand:

ARC & CONRAD JOHNSON

Amplifier Type:

Pre-Amplifier

includes:

1. Power Supply Restoration: All Power Supply Electrolytic Capacitor will be replaced with high-quality Audio Grade Capacitors (Aerovox, Cornell Dubilier, Sprague, Nichicon MUSE / Gold, ELNA Audio, Rubycon Capacitors).

2. New Audio-Grade Capacitors in the Signal Path sections (current sets are likely to have varied off Manufacturer Specifications)

3. Bridge Diode replacement with new Ultra-low Noise Silicon Diodes if current diodes performs below par (are noisy) under oscilloscope.

4. Op-Amp replacement with better quality Audio Certified Op-Amps that have significantly lower distortion (see feedback below) 5. Testing of ALL Tubes and Transistors (we will let you know if any are weak or faulty) 6. Strategic Zener Diode replacements with high quality and higher wattage equivalents 7. Any manufacturer recommended adjustments needed to ensure that your Amplifier runs at it's optimal best. 8. Sound quality testing using a Fluke Oscilloscope and high precision HP signal generator. 9. Fuse bypass (optional) to enhance Bass and sound clarity. We recommend using a good quality Surge protector if needed. 10. Solid Core Silver Plated cable replacement for audio output (if current cables are oxidized). 11. General cleaning of the amplifier inside with soft brushing as needed + testing. 12. Replacement of input signal resistors with high quality Vishay / Dale Metal film resistors (if current sets do not match). 13. Audiophile Silver Solder used for all Solder work done using METCAL irons and diagnosed with Fluke / Tektronics and HP Oscilloscopes / signal generators and Fluke Multimeters. If you have any questions, do not hesitate to contact us at any time。 sclfst85d@hotmail.com

Northern Territory

$ 290.00