Roland TB-303

Released in 1982

The TB-303 Bass Line is a single-oscillator monophonic bass synthesizer with a step sequencer, and it was one of Roland's most iconic products - it is the de facto standard for creating acid and techno bass lines. Rather than 'playing' it live, it is more geared toward recording a bass pattern, and tweaking the filter and other parameters while the pattern is playing.

Roland TB-303
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We stock both NEW and USED parts; all used electronic parts are tested and guaranteed working.

This listing reflects our current inventory and is updated in real time. If a part is shown as Out of Stock, we typically don't know when or if we might have it again - but click on the part for more info, and then you will be able to sign up for an alert when we do have it available again. By including out of stock parts in our listings, we hope to offer customers a more complete and useful resource.

We cannot diagnose repair issues by phone or email. For technical questions, we suggest posting on our Forums, where our techs - as well as other users - can offer help.

Battery contact spring
Battery contact spring
$1.95 (Part #6167)
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Battery contact, Roland
Battery contact, Roland
$1.95 (Part #9935)
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Battery contacts, pair
Battery contacts, pair
$7.95 (Part #5011)
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Battery door, Roland
Battery door, Roland
$12.95 (Part #3339)
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Button, large silver, Roland
Button, large silver, Roland
$4.95 (Part #3558)
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Button, small silver, Roland, Pkg of 10
Button, small silver, Roland, Pkg of 10
$3.95 (Part #3559)
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IC, 4001 quad NOR gate
IC, 4001 quad NOR gate
$2.95 (Part #3304)
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IC, 4011 quad gate
IC, 4011 quad gate
$2.95 (Part #3391)
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IC, 4013 flip-flop
IC, 4013 flip-flop
$2.95 (Part #3322)
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IC, 40174 flip-flop (replaces 14174)
IC, 40174 flip-flop (replaces 14174)
$2.95 (Part #3305)
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IC, 40174 flip-flop (replaces 14174)
IC, 40174 flip-flop (replaces 14174)
$2.95 (Part #3305)
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IC, 4050 hex buffer/converter
IC, 4050 hex buffer/converter
$2.95 (Part #1775)
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IC, 4066 quad bilateral switch
IC, 4066 quad bilateral switch
$2.95 (Part #3723)
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IC, 4584 hex Schmitt trigger
IC, 4584 hex Schmitt trigger
$6.95 (Part #8981)
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IC, BA662 Roland VCA chip
IC, BA662 Roland VCA chip
$57.95 (Part #4339)
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IC, D444C SRAM chip
IC, D444C SRAM chip
$19.95 (Part #1891)
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Knob, large rotary, Roland
Knob, large rotary, Roland
For Tempo or Volume
$7.95 (Part #3556)
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Knob, selector, Roland
Knob, selector, Roland
For Track, Mode
$7.95 (Part #3557)
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Knob, small rotary, Roland
Knob, small rotary, Roland
$6.95 (Part #3555)
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Phone jack, 1/4-inch, 5-pin PCB mount
Phone jack, 1/4-inch, 5-pin PCB mount
For Output, Mix In
$9.95 (Part #3535)
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Phone jack, 1/4-inch, stereo, 9-pin PCB mount
Phone jack, 1/4-inch, stereo, 9-pin PCB mount
For Headphones
$9.95 (Part #3410)
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Potentiometer, 1MA rotary
Potentiometer, 1MA rotary
For Decay
$12.95 (Part #3363)
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Potentiometer, 1MB rotary
Potentiometer, 1MB rotary
For Tempo (original pot is C taper; this is a workable substitute)
$12.95 (Part #3361)
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Potentiometer, 50KA rotary
Potentiometer, 50KA rotary
For Cutoff Freq, Env Mod
$12.95 (Part #3365)
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Potentiometer, 50KA with switch
Potentiometer, 50KA with switch
For Volume
$12.95 (Part #3360)
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Potentiometer, 50KB rotary
Potentiometer, 50KB rotary
For Tuning, Accent
$12.95 (Part #3364)
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Potentiometer, 50KBx2 rotary
Potentiometer, 50KBx2 rotary
For Resonance
$16.95 (Part #3362)
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Power adapter, 9VDC, 300mA
Power adapter, 9VDC, 300mA
$12.95 (Part #3628)
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Power inlet jack
Power inlet jack
$5.95 (Part #3062)
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Pushbutton tact switch, 7.3mm, 4-pin
Pushbutton tact switch, 7.3mm, 4-pin
$2.95 (Part #4377)
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Pushbutton tact switches, set of 10
Pushbutton tact switches, set of 10
$21.95 (Part #4377X)
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Rotary switch, 4-position
Rotary switch, 4-position
For Mode
$19.95 (Part #3592)
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Screw set, Roland
Screw set, Roland
For bottom case
$3.95 (Part #3642)
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Slide switch, 2-position
Slide switch, 2-position
For Waveform selector
$9.95 (Part #2895)
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Transistor, 2SC1583
Transistor, 2SC1583
$8.95 (Part #5372)
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Transistor, 2SC2291 dual NPN
Transistor, 2SC2291 dual NPN
$14.95 (Part #2599)
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Transistor, 2SK30A-O
Transistor, 2SK30A-O
$3.95 (Part #2605)
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