What's Inside - Part 2

More pictures of the inside of the organ. Here is the vibrato line box, which connects to the motorised vibrato scanner. The red objects are capacitors.

This is just a phase shifter or delay line, which varies the pitch at each output. The scanner selects the various outputs in sequence depending on the settings selected.

This is the main amplifier, and the reverb speaker can be seen behind it. This is a valve (or 'tube') amplifier, no rubbish transistors or other electronic stuff here.

The mains lead (or 'power cord' if you are American) is soldered to two terminals directly behind the small metal box on the left.

The valves are the tubular glass objects, also here are the two transformers (black and silver cubes) and two capacitors (tall black and silver cans)

This is a closeup of the paper label tied to the wiring. Probably from when the organ was manufactured, it has the model and serial numbers at the top.

The middle section is for test results, most of which are not filled in.

At the bottom is the name 'Terry' whoever he was.

The date is 7/1/65.

The date could be read as 7 January, or 1 July. Either way, it must be wrong, since most of the components in the organ have date codes near the end of 1965. There is no way it was made in January or July 1965.

At the bottom right is the reverb unit. This is a very simple device, consisting of an output coil at one end and a pickup at the other. Two springs are stretched between them.

When a signal is sent into the unit, the springs vibrate, and continue to do so for a short while afterwards. The resulting sound is collected by the pickup and routed to the reverb amplifier, which is visible behind the spring unit.

The two main speakers can be seen in the background.