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■About This Items■ It is modified with 1N34A and LED 3mm diodes for clipping and a fusion of FUZZ and Over Drive. We plugged in the guitar and got sound. Tested.It works fine with 9V power adapter or 9V battery. It made in Taiwan 1997 and Modified in Japan 2025. The power supply unit has been modified so that it can be used with a PSA-type adapter. Boss SD-1 with ACA type power supply section is modified to be used with PSA type adapter from ACA type adapter by connecting board number 6 and 7. Modified part_1:【IC1】Changed operational amplifier from JRC4558DD to TL072CP. Modified part_2:【C1(47nF)】【C2(47nF→100nF)】【C3(18nF→100nF)】【C4(18nF→220nF)】【C5(27nF→220nF)】【C6(10nF→0nF)】【C7(1μF)】【C8(47nF)】【C10(1μF)】【C11(47μF)】【C17(100μF)】 The capacitors were changed to audio grade electrolytic capacitors or Metallized capacitor. Modified part_3:【R2(470K→620K)】【R5(33K→10K)】【R6(4.7K→2.2K)】【R7(10K→1K)】【R8(470Ω→220Ω)】【R9(10K→1K)】These resistors were changed from carbon resistors to metal film resistors. Modified part_4:【D4】【D5】【D6】The originally mounted 1N96 diode is removed and modified so that clipping fuzzy by one 1N34A and clipping overdrive by two LED3mm can be changed by a switch on the entire surface of the unit. In addition, a 47pF capacitor is installed to prevent outgoing transmissions. When the switch is turned to the left, clipping fuzzy on the 1N34A side is applied, resulting in a fuzzy tone with a unique sound attenuation. When the switch is turned to the right, clipping overdrive with 3mm LEDs is produced, resulting in an overdrive with clear high frequencies. Modified part_5:【LED】 color changed from red to White. The rubber ring of the pedal guide bushing was replaced with a new one.
■Appearance■ Slightly peeling paint in some areas. Please have a look at the photos.
■Condition■ Used & Modify.
■Included Items■ Nothing(Main Unit Only). Not include Adapter.
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