Hammond AO-35-7 Tube Reverb Amplifier – Technician-Owned. Original Hammond AO-35-7 tube amplifier from the personal collection of a longtime Hammond organ service technician. Originally pulled from a working organ, this unit was later professionally configured and used as a dedicated reverb amplifier in a custom stereo jukebox system alongside a 6550-based power amplifier. It spent years in the technician’s private collection and was functioning in that application when last used. The chassis has been refinished in silver-gray enamel and presents well. This amplifier is currently configured as a reverb unit and is not set up as a guitar amplifier or hi-fi amplifier in its present form. Please note that the amplifier has been in storage for several years and should be inspected and evaluated by someone familiar with vintage tube equipment before being placed into regular service. An excellent candidate for. Hammond organ restoration. Tube reverb projects. Custom audio builds. Guitar amplifier conversions. DIY tube amplifier projects. I have more of these available for those interested. Please review photos carefully and contact me with any questions.