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Remove the R223 100kΩ grounding resistor connected to C213 to fatten the percussion signal and the main organ signals.
Short R222 (270kΩ) and R226 (180kΩ) to increase the volume level of the percussion signal so that it is better matched with the
boosted main organ signals.
Replace C214 (0.01μF) with a 0.1μF 100V capacitor. Replace C204 (0.047μF, see
below) and C215 (0.1μF) with 0.47μF 630V
capacitors to allow the lowest bass frequencies to pass unattenuated.
Re-locate the percussion soft switch to the output of the Q201 transistor (see green edits
). Because the R222, the R226 and
the R229 resistors were removed as part of the main organ signals and the percussion signal volume level boost modification, the main
organ signal volume levels is lowered when the percussion soft switch was set to the “soft” setting. Relocation of the soft switch path
restores the correct volume levels.
The stock L100 series and Porta-B pecussion fast decay duration is longer than that of the B3/C3. Add a 1MΩ resistor in parallel with
R409 (2.2MΩ) which is located on the percussion decay switch (see orange edits
). This produces a duration similar to the B3/
C3 percussion fast decay. This does not affect the percussion slow decay duration which is controlled by the R219 3.9MΩ resistor.
7–7 KON ZISSIS TREBLE BOOST MOD
More treble and mid-range is added with this modification.
Replace the output of C203 (39pF) that connects to C204 (.047μF) with an SPDT On/Off/On switch. Connect one On lead to the original
output of C203 for normal brightness. Connect the other On lead to a 1.8MΩ resistor for high treble boost.
Replace R203 (4.7MΩ) with a 10MΩ resistor. Add another SPDT On/Off/On switch and connect one One lead to the original output of
R203 for normal bass. Add a 39pF capacitor to the other On lead for added bass.
Figure 7–6: Kon Zissis Treble Boost Mod
Summary of Contents for L-100 Series
Page 1: ......
Page 6: ......
Page 9: ...Page 9 Figure 1 4 Block Diagram L 100 Series Figure 1 5 Typical Tone Generator...
Page 38: ...Page 38 This page intentionally left blank...
Page 44: ...Page 44 Figure 5 7 Wiring Diagram L 100 Organ...
Page 45: ...Page 45 Figure 5 8 Wiring Diagram L100 1 and L 100 2 Organs...
Page 46: ...Page 46 Figure 5 9 Wiring Diagram L 200 Organ...
Page 49: ...Page 49 Figure 5 13 Parts Layout AO 41 Vibrato Amplifier...
Page 50: ...Page 50 Figure 5 14 Parts Layout AO 47 126 000023 Vibrato Amplifier...
Page 51: ...Page 51 Figure 5 14A Comparison Between AO 41 and AO 47 Vibrato Amplifiers...
Page 52: ...Page 52 Figure 5 15 Parts Layout AO 42 117 000019 Percussion Amplifier...
Page 53: ...Page 53 Figure 5 16 Parts Layout AO 43 126 000017 Power Amplifier...
Page 54: ...Page 54 Figure 5 17 Power Amplifier Fuse Location Canadian 101 000130...
