Tuning Of The Tone Generators And Testing Of The Generator Functions - Wersi GALAXY Assembly Manual

Mate the connectors leading to plug 1 on G P 1 (M/Man) and G P 1
(U/Man I)respectively.
Release the push button "Orchestra Coupler". Balance the fixed
stops of the middle manual against the M /Man drawbars (trimpot Pl
on GP1 M/Man).
Depress the push button "Orchestra Coupler". Balance
the U/Man II fixed stops against the M/Man drawbars 10.
(trimpot P 1 on G P 1 U/Man II).
Balance the U/Man I fixed stops against the drawbars of the upper
manual (trim pot P1 on GP1 U/Man I).
3.15 Tuning of the Tone Generators and Testing of the
Generator Functions
1. Set the rotary control "Master Pitch" on the panel 12. AP 1 G
to the centre of rotation.
2. Set the control "Orchestra Intonation" on the right control
panel to the centre of rotation.
3. Flip the tab " Drawbars/Fixed Stops" of the upper manual
down (Fixed Stops).
4. Flip the tab " Drawbars/Fixed Stops" of the middle manual
down (Fixed Stops).
5. Activate the stop "Clarinet 8" in both U /Man and M /M an
respectively. Do not select any other stops. Make sure that
the push button "Orchestra Coupler" (right control panel) is
released. Playing either upper or middle manual, you should
hear a clarinet sound, very likely at different pitches.
6. Convince yourself that the transposer switch is set to " C "
(standard pitch).
AM 075 (Part)
7. Push the " Slalom " control on the left control panel to its
left-hand stop.
8. Depress and hold the A-key of the 4th octave on the middle
manual This tone should be "middle A"; having a frequency
of 440 Hz. There are many methods by which this can be
achieved (frequency counter, tuning fork, tuning flute, or
another instrument of known tuning).
Adjust the cermet trim pot P 2 on the tone generator I until
the "middle A " has the exact pitch. If you are using another
instrument as a reference, listen for the beat frequency
which is to be slowed down until it disappears. If you are
using a frequency counter at the tone generator test point set
the frequency to 3520 Hz.
9. Push the "Slalom" control to its right-hand stop. The tone
will rise by approximately one octave.
10. Depress and hold the A-key of the 3rd octave. This tone
should become the "middle A'! Adjust the trim pot P 1 on the
tone generator I until this is achieved. If you use a frequency
counter you are to get a reading of 7040 Hz.
11. As a crosscheck slide the " Slalom " control from stop to
stop. The pitch of the "A" should change exactly one octave.
By the way, the normal pitch of the entire organ is obtained
with the "Slalom" control at its right-hand stop.
12. Depress and hold the same key in the upper manual. You
will hear a second clarinet which very likely is out of tune
with the first one.
13. Set the "Slalom" control to its left-hand stop.
14. Verify that none of the push buttons "Ensemble Tuning" on
the right control panel is depressed.
15. Adjust the trimpot P 2 on the tone generator ll to achieve a
"zero beat" between the two clarinets.
16. Set the "Slalom" control to its right-hand stop.
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