Hammond AO-35 Reverb Amplifier
Archived listing from the original vintage-amplifier.com. Prices, seller details and purchase links have been removed; this page is a reference record, and nothing here is for sale. About this archive.
Hammond AO35 reverb Amp. These amps make great guitar amps with a little conversion work. Do a Google search for more information. The amp powers up and passes a signal. It looks to have all original caps and other components.
About this model
The AO-35 is the reverb amplifier from Hammond organs of the A-100 family, a small chassis that drove the spring reverb tank. Forum documentation lists a pair of 6BQ5 output tubes with a 5U4 rectifier and 12AU7 and 12AX7 tubes, and notes that later organs used a different unit. We could not confirm those details against a Hammond schematic.
The seller pointed out what most buyers want them for: with some conversion work they make good guitar amplifiers. This example powered up and passed a signal with what looked like original components.
Chassis like this often come out of house clearances, pulled from an organ that was too heavy to keep. If you have inherited an organ along with other amplifiers, our notes on valuing and selling an inherited collection cover which parts tend to find buyers and which are worth less than the cost of moving them.
| Maker | Hammond Organ Company, USA |
|---|---|
| Model | AO-35 |
| Type | Organ reverb amplifier |
| Tubes | 6BQ5 pair, 5U4, 12AU7, 12AX7 (forum sources) |
Questions collectors ask
What is a Hammond AO-35?
The reverb amplifier used in Hammond A-100 organs; it drove the organ's spring reverb.
Can an AO-35 be turned into a guitar amplifier?
Yes, it is a common conversion project, as the original seller noted.
Sources: Wikipedia: Hammond organ.
