aion SAPPHIRE Podręcznik - Strona 7

Przeglądaj online lub pobierz pdf Podręcznik dla Akcesoria do instrumentów muzycznych aion SAPPHIRE. aion SAPPHIRE 13 stron. Amp-like overdrive

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BUILD NOTES, CONT.

Galaxie Mod

The Galaxie Mod created by Keith Aviles of Machine Head Pedals (known as 11 Gauge on the TDPRI

forums) is without question the most extensive BD-2 mod that has been developed. This modification—

or more accurately, major surgery—changes out about half of the components to completely restructure

the pedal. It lowers the gain and fully eliminates the fizz while improving the tone control's usefulness.

For a few of the parts, capacitors are replaced with resistors and vice versa. To accommodate this, some

of the component footprints on the Sapphire PCB are composites that allow either 0.2" film capacitors

or 0.3" resistors to be used, so the pads look like a sideways number 8. The PCB silkscreen shows the

components from the stock BD-2.

The parts list includes alternate values for the mod, but for completion's sake, here is the full list.

PART STOCK VALUE

100n

150n

47pF

220pF

100n

47n

2n2

C10

100pF

C11

1uF

C15

18n

C16

18n

C11: This value can be tailored to your preference. The original mod uses 100n, but Keith suggests that

82n or 68n may be better alternates if you have them.

R24: In the Galaxie Mod, this resistor is changed to 33k. However, the Sapphire's bass control is a

variable resistor in series with R24, and at max rotation it's nearly 33k in value (6.8k + 25k = 31.8k). It's

recommended to leave R24 as the stock 6.8k, but you could increase it to 8.2k if you want full clockwise

rotation to be closer to 33k.

SAPPHIRE AMP OVERDRIVE

MOD VALUE

10n

39n

100pF

Omit (leave empty)

10k resistor

100k resistor

47n

220pF

68n, 82n or 100n (see note)

33n

22n

PART STOCK VALUE

C18

2n2

1k5

R11

330k

R12

100k

R13

R14

15k

R15

R18

2k2

R22

5k6

R24

6k8

D2-D7

1N914

MOD VALUE

Omit (leave empty)

10k

Omit (leave empty)

22n capacitor

6n8 capacitor

Jumper (bare wire)

100k

10k

2k2

see note

Omit (leave empty)