Table of Contents
Advertisement
4.Saxophone16': Rich in harmonics, becoming increasingly "hollow" towards the
bass end
of the manual.
5. Flute 8': Round tone, few harmonics.
6. Viola 8': Bright sound, rich in harmonics.
7. Clarinet 8': Typical woodwind tone.
8. Oboe 8': Thin woodwind, brighter than clarinet 8'.
9. Trumpet 8': Loud and bright brassy tone.
10. Flute 4': Same as Flute 8; but sounds higher by an octave.
11. Violin 4': Same as Viola 8; but an octave higher, almost no fundamental tone.
12. Nasat 2-2/3':
Sounds one fifth higher than the 4'stops(G appears on ac-key). Subdued voice
as fill-in.
13. Piccolo 2': Powerful and bright (repeats at the highest C).
14. Flute 1':
Thin add-on voice (repeats starting at the C of the 4th octave).
1 5. Mixture III: Bright harmonic complement to full-bodied voices.
3.8 Testing of the Frequency Vibrato
The fixed stop voices of the upper manual can be used to test the various modes
of the frequency vibrato.
We suppose that the tone generator was tuned after its assembly.
( ) Push the connector from the harness G O 1 onto the pins of circuit board U S
2 " Reverb/Vibrato, etc "
AM 071 (Part)
( ) Verify that the pitch of the entire organ varies by an exact octave when the
"Slalom" control is moved from stop to stop. Remark: If you installed a "Slalom"
control which is different from the one you tested the tone generator with the
generator will have to be retuned due to the resistance tolerance of different
controls.
Standard pitch (higher pitch) should exist with the "Slalom" control at its right-
hand stop.
( ) Turn on (depress) the push button switch "Delayed Vibrato":
( ) Depress one or more keys in the upper manual. After a short delay a weak
vibrato should appear. The delay is initiated every time a key is depressed after a
pause in playing. The delay time can be adjusted by means of trimpot P 3 on the
tone generator board G 1. Our recommendation: center of rotation.
( ) Release the button "Delayed Vibrato" and depress "Contin. Vibrato": The
vibrato exists immediately when a key is depressed.
( ) In addition, depress the button "Vibrato II". The intensity (or depth) of the
vibrato increases.
( ) Depress the button "Vibrato III" additionally. This causes the heaviest vibrato.
By the way, the two vibrato intensity buttons ll and Ill are effective only in
conjunction with a depressed "Delayed Vibrato" or "Contin. Vibrato":
( ) Depress yet the button "Slow Vibrato". The previously fast vibrato should slow
down about 40%.
3.8.1 General Procedure in Trouble-Shooting of Switch
Functions
All modes of operation of the various building blocks throughout the organ which
are controlled by a mechanical switch are activated as follows: The switch sends
a negative (-15 V D C) control voltage to the corresponding location. Since it is
irrelevant from where the control voltage originates we can also activate a
particular function with the help of our test wire.
Example: Suppose that the function "Slow Vibrato" does not work while all other
vibrato modes are operating properly. First, we trace the control voltage.
8
Advertisement
Table of Contents
