Akashic Guitar effects circuit lookup
GAINTONELEVEL

1590B · 3 knobs

Tagboard Effects

Ibanez BB9 Bottom BoosterVerified

Based on the Ibanez BB9 Bottom Booster· 2 other boards clone it

Category
Boost
Controls
Gain · Tone · Level
Build
Vero· 21×23· 44 cuts, 26 links
Layout
Verified · Tagboard Effects marks it as built and working
Tags
Booster, Ibanez, Overdrive

From the post

Here we go with one of my personal favourites. To me, the sound is simply amazing. As Dirk's notes on the schematic suggest, you won't be saving any money by building this. New ones sell for pretty cheap and one should be able to score a used one for a very decent price. I still wanted to see how compact i could possibly get this and yes, i'm rather happy with the results. I did cut a few corners though. I omitted the six 100n power decoupling caps from each opamp as adding those would have made this way bigger (let's just hope this doesn't add to noise floor). The input resistor is 12k on this layout, but to make it verbatim, you should take 5k1 and 6k1 resistors in series in its place - or a value of 11k2. I also dropped the 100k resistor and 47p cap from the output. If you want to add those, just solder them between lugs 1 & 2 of the Level pot. I also made a couple of small changes to the power supply section input. I burned the LT1044 on my original unit, and that was way easy to do. So i added series protection and a zener+100R resistor after that. Should be pretty fool proof like this. Charge pump produces +9V/-9V swing, so you're safe with your 16V rated electrolythic caps. Should be a nice fit for 1590B.

Snippet for the marketing text:

Sometimes it's best to keep it simple. Which is why, in a world of dizzying often over-complex technology, the durable, dependable, and simple stomp box continues to be the most widely used and effective means to expand, color, distort, mutate, sustain, and twist tone. The Ibanez BB9 is a booster that provides a fat bottom end with a powerful sound, perfect for the player who wants to push their amp into overdrive without losing any of their low-end. This pedal is designed to help clean tones reverberate even more and bring more intensity to a player's sound. Combine it with a distortion pedal to create of a wide variety of tone colors.

Schematic

This is a board layout, a drawing of where each part goes, and the post may link the schematic it was drawn from. Open the layout at Tagboard Effects. No KiCad fragment has been drawn for this circuit yet.

Parts list 36 rows

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Check before you build · 1 value the reader of this layout was not sure of
  • 50K resistor above IC2: printed clearly, unusual value
RefValueNormalizedTypeNotes
Resistors 15
×410K10kread from the layout by eye
×312K12kread from the layout by eye
×31K1kread from the layout by eye
×2470K470kread from the layout by eye
×21M1Mread from the layout by eye
×251Ω51read from the layout by eye
×151K51kread from the layout by eye
×122K22kread from the layout by eye
×150K50kread from the layout by eye
×18.2K8.2kread from the layout by eye
×11.2K1.2kread from the layout by eye
×168K68kread from the layout by eye
×13.3K3.3kread from the layout by eye
×1820Ω820read from the layout by eye
×1100Ω100read from the layout by eye
Capacitors 11
×210pF10pread from the layout by eye
×247pF47pread from the layout by eye
×1100pF100pread from the layout by eye
×1470pF470pread from the layout by eye
×222nF22nread from the layout by eye
×133nF33nread from the layout by eye
×247nF47nread from the layout by eye
×11uF1uread from the layout by eye
×13.3uF3.3uelectrolytic; read from the layout by eye
×310uF10uelectrolytic; read from the layout by eye
×1100uF100uelectrolytic; read from the layout by eye
Diodes 3
×21N40021N4002D1, D2; read from the layout by eye
D31N58171N5817read from the layout by eye
D410-12V Zener10-12V ZENERread from the layout by eye
ICs 4
IC1JRC4558DJRC4558Dread from the layout by eye
IC2JRC4558DJRC4558Dread from the layout by eye
IC3JRC4558DJRC4558Dread from the layout by eye
IC4ICL7660SICL7660SICL7660S or LT1044; read from the layout by eye
Potentiometers 3
GainB50KB50kPotentiometerdual; read from the layout by eye
ToneB20KB20kPotentiometerread from the layout by eye
LevelB100KB100kPotentiometerread from the layout by eye

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