Caution

Insert an 0.1 mfd, 400-volt DC capacitor in series with the headset to prevent DC voltage from damaging it. 3-11. Hum in the loud speakers may indicate trouble in the reverberation spring system assembly. (Reference paragraph 3-28.) If a sustained hum or howl is heard, starting only when a low note is played at high volume, check for the following a. Microphonic tubes in the amplifier. Replace all tubes if necessary. b. Improper grounding of all plug connections to and from the amplifier. c....

23 Inspecting Stripping Cleaning And Lubricating

Rotate all controls and operate all switches. Pull out all drawbars. Operation should be smooth. Toggles should snap firmly into position. Depress the playing keys check for proper tension in each case and for cracks and chips. Check the operation of the locking and trip mechanism by striking each preset and adjust key in turn. Be sure that the cancel key releases the associated preset or adjust key on each manual. 2-6. Check the mounting of the reverberation spring system assembly in the...

51 Detailed Theory Of Operation

Hammond Syncronous Runmotor Inside

The main tone generator assembly consists principally of 48 rotating sub-assemblies each subassembly consists of a shaft, 2 disks called tone wheels, and a bakelite gear , and a drive shaft which extends the entire length of the generator. This drive shaft is resiliently coupled at one end to a starting motor and at the other end to a synchronous run motor reference paragraph 5-12 , and is divided into several sections connected by semi-flexible couplings. See figure 1-5. A series of 24...

562 Replacement Of Components

Hammond Organ Remove Preset Panel Screws

Remove the four hexagonal-head bolts and their associated springs and T-washers which secure the generator assembly to the console. 5-65. Remove the four screws from the left and right-hand side panels of the music rack. Tilt the bottom of the music rack by lifting the side panels, and remove the rack by pulling outward. 5-66. Remove the 4 chassis bolts underneath the console and the 2 machine screws under the front lower manual rail that hold the entire manual chassis in place. 5-67....

13 Description

The Model C-3 Hammond Electric Organ is a complete organ system for the production of musical tones by electronic means. The organ consists primarily of a tone cabinet which includes 1 power amplifier and 4 speakers , a console, and connecting cords and cables. The organ is a movable unit which fits into a space approximately 4 feet square, and operates from a standard 60-cycle, 11 7 volt power source. A 50-cyclc 234-volt model is also available. See figure 1 1. 1-7. CONSOLE. The console...

31 Troubleshooting

Hammond Organ Schematics

When troubleshooting, use all of the aids included in this handbook block diagram figure 3-1 , overall schematic figure 3-3 , amplifier schematic figure 5-10 , illustrations of components figures 1-4, 1-5, and 3-2 , stage as shown in schematic, figure 3-3 . Make all capacitor checks with capacitor analyzer, if available. Always disconnect capacitors before making tests otherwise the readings will be affected by a possible shunt circuit. Replace any capacitor which shows a...

41 Preset Panel Tone Selection

Hammond Organ Preset Panel

The preset keys shown in figure 1-2 are used to select the ready-mixed tone colors. Nine color-coded wires from each preset key are fastened to the bus bars of the preset panel by slotted screws. Each group of nine color-coded wires is fed through individual holes below the preset panel. The color coding of each group is identical to the color coding of the nine wires from the drawbars above the preset panel . The drawbars can be withdrawn to numbered stops. The frequency relationship of...