Then I was asked again for another single channel build and this time is was a brown 6G16 Vibroverb in a LunchBox. While the amp retained the vibrato circuit we dropped the reverb portion off. The upgrades for this build included a Mercury Magnetics a 4/8/16 ohm multi-tap OT, Sprague Atoms, & SoZo Blue Molded caps, as well as a bright switch.