Hammond Model A, Руководство пользователя, Страница: 37 / 298

PRESET KEYS
At the left end of each manual are twelve keys identical to the playing keys
except reversed in color (Fig. 3). These are replaced by twelve numbered
buttons on the Model E console.
When a preset key is depressed it locks
down and is released only when another
is depressed. The exception to this is
the cancel key at the extreme left, which
serves only to release any key which
may be locked down. Only one preset
key is used at one time. If by mistake
two are depressed and locked, they may
be released by means of the cancel key.
Each preset key, with the exception of
the cancel key and the two adjust keys
at the extreme right of the group, makes
available a different tone color which has been set
up on the preset panel located inside the console. These tone colors are set up at
the factory in accordance with a standard design which has been found to best meet
the average organist's requirements. They may be changed, if desired, by removing
the back of the console and changing the preset panel connections in accordance with
instructions on a card located near the preset panel.
When either adjust key is depressed, the organ speaks with whatever tone
color is set up on the harmonic drawbars associated with that key. The
percussion effect on Models B-3, C-3, RT-3, A-100 & D-100 is introduced when the
upper manual B preset key is depressed (see Percussion also).
HARMONIC DRAWBARS
Each console has four sets of harmonic drawbars, two for each manual. Figure
4 shows one group of harmonic drawbars, by which the organist is enabled
FIGURE 3
4