Lithium Grim OmniScreamer, Инструкция по сборке

Страница: 5 / 12

OmniScreamer v1.0
Manufacturers and product names are mentioned solely for circuit identification, and where applicable their trademarks are the
property of their respective owners who are in no way associated or affiliated with the author. No cooperation or endorsement
is implied.
5
Configurations and components
This PCB can be configured to become a wide range of Tubescreamers. The components needed to
build these configurations can be found in the separate configuration sheet.
If you are not sure which type of components you need to buy, you can follow this list:
1. All resistors are metal film 1% 0,6W
2. Capacitors smaller than 1nF are MLCC unless stated otherwise in the sheet.
3. Capacitors 1nF – 1uF are MKT/Wima/SMF which ever you prefer unless stated otherwise in
the sheet.
4. Capacitors 1u and bigger are Electrolytic and rated 25V+ unless stated otherwise in the
sheet.
5. SW1 and SW4 (buffers) can best be miniature PCB mounted DPDT (on-on) switches :
6. SW2 (onboard diode selection) is normally a DIP 2 . If the sheet says “jump” you need to short
both poles like this:
7. SW3 (Boost) is a standard DPDT On-On footswitch
8. SW5 (External Diode section)can best be DPDT (On-Off-On). You can find all types of diode
configurations in the diode section of these instructions. You can also buy a separate
clipping PCB in the shop!!
9. SW6 (feedback loop) is a DP3T On-Off-On switch and uses a 220nF and 2nF capacitor on each
side. You will also need to put a 47k in R22 on the PCB. The switch can be wired like this:
Pots
P1 Bass
P2 Gain
P3 Boost
P4 Boost Tone
P5 Treble
P6 Tone (or Glass)
P7 Level