Single 6aq5 tube amp portable#

The original circuit was maintained but any noisy/out of spec resistors were replaced and the push pull center channel was removed so that the single ended 6AQ5 output tubes get the most B+ that the current rectifier setup will allow. All of the original tubes still tested strong and sound wonderful so they were kept in the amp (including the Mullard 12AX7). We then installed a fuse and added an external power switch. The power supply and power amp were upgraded with modern low ESR electrolytic capacitors throughout and film caps for the post phase inverter coupling caps. The finish is a hand rubbed tung oil finish that is tough yet beautiful to look at! This was essentially a one off custom build which we get the itch to do from time to time! Then the amp was brought out to a woodshop and a custom case was built from scratch out of reclaimed mesquite wood flooring.

The metal grill is painted a beautiful vintage-correct gold using expensive automotive grade paint and the original logo is reattached using E6000.

Single 6aq5 tube amp portable#

The front grill and logo came from the portable case and were recycled for this project. The amp was first converted to be a standalone power amplifier that maintains much of the original circuit design while restoring what is necessary for ultimate reliability without robbing the character of the amp. For sale is a fully restored Zenith stereo power amplifier that was taken from an unrestorable portable record changer.