# Mach 1 Clipping Mod

## Description

Mach 1 overdrive clipping\-section mod with the 12\-position rotary clipping selector integrated onto the main PCB, D4/D5 omitted, PCB\-mounted Volume/Drive/Tone controls, and a 125B\-oriented control layout without Zero IOD branding\.

## Project Details

- **Owner:** scathc2
- **Created:** 7/4/2026
- **Last Updated:** 7/4/2026
- **Visibility:** Public
- **Stars:** 1

## Key Components

### D100 — [1N5817\-T](https://flux.ai/lcsc/1n5817-t~plig.md)

- LCSC Part Number: C507852
- Product Info Url: https://lcsc\.com/product\-detail/Schottky\-Barrier\-Diodes\-SBD\_Diodes\-Incorporated\-1N5817\-T\_C507852\.html
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2111021230\_Diodes\-Incorporated\-1N5817\-T\_C507852\.pdf
- Mount: Through Hole
- Role: Protection
- Manufacturer Name: DIODES\(美台\)
- Part Type: Schottky Barrier Diodes \(SBD\)
- Manufacturer Part Number: 1N5817\-T
- Role Details: Through\-hole DO\-41 9V input reverse\-polarity protection diode from Mach 1 BOM\.
- JLCPCB Part Class: Extended Part
- Package or Case Code: DO\-41\_BD2\.4\-L4\.7\-P8\.70\-D0\.9\-FD

**Pins:**
- A [pin 1]
- K [pin 2]

### D2 — [1N914BTR](https://flux.ai/lcsc/1n914btr~j3l2.md)

- Role: Clamping
- Part Type: Switching Diode
- Product Info Url: https://lcsc\.com/product\-detail/Switching\-Diode\_ON\-Semicon\_1N914BTR\_ON\-Semicon\-ON\-1N914BTR\_C258180\.html
- JLCPCB Part Class: Extended Part
- LCSC Part Number: C258180
- Mount: Through Hole
- Package or Case Code: DO\-35\_BD2\.0\-L4\.2\-P8\.20\-D0\.5\-RD
- Manufacturer Part Number: 1N914BTR
- Manufacturer Name: onsemi\(安森美\)
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/1809111722\_onsemi\-1N914BTR\_C258180\.pdf
- Role Details: Through\-hole DO\-35 D2/D3 anti\-parallel Mach 1 clipping reference pair; D4/D5 omitted and onboard rotary selector is separate\.

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### D3 — [1N914BTR](https://flux.ai/lcsc/1n914btr~j3l2.md)

- Part Type: Switching Diode
- Product Info Url: https://lcsc\.com/product\-detail/Switching\-Diode\_ON\-Semicon\_1N914BTR\_ON\-Semicon\-ON\-1N914BTR\_C258180\.html
- Mount: Through Hole
- JLCPCB Part Class: Extended Part
- LCSC Part Number: C258180
- Role Details: Through\-hole DO\-35 D2/D3 anti\-parallel Mach 1 clipping reference pair; D4/D5 omitted and onboard rotary selector is separate\.
- Package or Case Code: DO\-35\_BD2\.0\-L4\.2\-P8\.20\-D0\.5\-RD
- Manufacturer Part Number: 1N914BTR
- Manufacturer Name: onsemi\(安森美\)
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/1809111722\_onsemi\-1N914BTR\_C258180\.pdf
- Role: Clamping

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### D6 — [1N914BTR](https://flux.ai/lcsc/1n914btr~j3l2.md)

- Role: Clamping
- Role Details: Through\-hole DO\-35 retained D6 clipping diode; D4/D5 intentionally omitted for the onboard rotary clipping selector mod\.
- Part Type: Switching Diode
- Product Info Url: https://lcsc\.com/product\-detail/Switching\-Diode\_ON\-Semicon\_1N914BTR\_ON\-Semicon\-ON\-1N914BTR\_C258180\.html
- JLCPCB Part Class: Extended Part
- LCSC Part Number: C258180
- Mount: Through Hole
- Package or Case Code: DO\-35\_BD2\.0\-L4\.2\-P8\.20\-D0\.5\-RD
- Manufacturer Part Number: 1N914BTR
- Manufacturer Name: onsemi\(安森美\)
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/1809111722\_onsemi\-1N914BTR\_C258180\.pdf

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### DRIVE — [RV16AF\-41](https://flux.ai/jwwitherspoon/rv16af-41~ue.md)

- Resistance: 1MΩ
- Datasheet URL: https://cdn\-blog\.adafruit\.com/uploads/2022/01/Taiwan\-Alpha\-16mm\-pots\-datasheet\.pdf
- Role: Gain Control
- Mount: Through Hole
- Role Details: PCB\-mount panel Drive/Gain pot for 125B build; configured as 1MΩ\. Verify exact A1M physical pot pinout against chosen part before manufacturing\.
- Part Type: Potentiometer

**Pins:**
- P1 [pin 1]
- P2 [pin 2]
- P3 [pin 3]

### J\_IN — [61300211121](https://flux.ai/adrian95/61300211121~11.md)

- Datasheet URL: https://www\.we\-online\.com/components/products/datasheet/61300211121\.pdf
- Manufacturer Name: Würth Elektronik
- Manufacturer Part Number: 61300211121
- Role: Input Connector
- License: https://creativecommons\.org/licenses/by/4\.0/
- Role Details: 2\-pin offboard input jack connection: signal and ground\.
- Part Type: Connector

**Pins:**
- P1 [pin 1]
- P2 [pin 2]

### J\_OUT — [61300211121](https://flux.ai/adrian95/61300211121~11.md)

- Role Details: 2\-pin offboard output jack connection: signal and ground\.
- Datasheet URL: https://www\.we\-online\.com/components/products/datasheet/61300211121\.pdf
- Manufacturer Name: Würth Elektronik
- Manufacturer Part Number: 61300211121
- License: https://creativecommons\.org/licenses/by/4\.0/
- Role: Output Connector
- Part Type: Connector

**Pins:**
- P1 [pin 1]
- P2 [pin 2]

### J\_PWR — [61300211121](https://flux.ai/adrian95/61300211121~11.md)

- Datasheet URL: https://www\.we\-online\.com/components/products/datasheet/61300211121\.pdf
- Manufacturer Name: Würth Elektronik
- Manufacturer Part Number: 61300211121
- Role Details: 2\-pin offboard 9V DC supply connection: \+9V and ground\.
- License: https://creativecommons\.org/licenses/by/4\.0/
- Role: Power Input
- Part Type: Connector

**Pins:**
- P1 [pin 1]
- P2 [pin 2]

### J\_SW — [61300211121](https://flux.ai/adrian95/61300211121~11.md)

- Datasheet URL: https://www\.we\-online\.com/components/products/datasheet/61300211121\.pdf
- Role Details: Offboard footswitch/status LED switch connection representation\.
- Role: Switch Connector
- Manufacturer Name: Würth Elektronik
- Manufacturer Part Number: 61300211121
- License: https://creativecommons\.org/licenses/by/4\.0/
- Part Type: Connector

**Pins:**
- P1 [pin 1]
- P2 [pin 2]

### LED1 — [LTL\-307EE](https://flux.ai/vasy_skral/ltl-307ee~a2.md)

- Manufacturer Name: Lite\-On Inc\.
- License: https://creativecommons\.org/licenses/by/4\.0/
- Datasheet URL: https://mm\.digikey\.com/Volume0/opasdata/d220001/medias/docus/1153/LTL\-307EE\.pdf
- Part Type: LED
- Role Details: Pedal status LED driven through R100 and footswitch/switch pad\.
- Role: Indicator
- Manufacturer Part Number: LTL\-307EE

**Pins:**
- A [pin 2]
- K [pin 1]

### SW\_CLIP — [SR2612F\-0112\-21R0B\-D8\-N](https://flux.ai/vasyl/sr2612f-0112-21r0b-d8-n~wms.md)

- Datasheet URL: https://www\.snapeda\.com/parts/SR2612F\-0112\-21R0B\-D8\-N/Alpha%20Taiwan/datasheet/
- Role: Clipping selector
- Mount: Through Hole
- Part Type: Switch
- Role Details: Onboard 1P12T rotary switch; common ties to one D2/D3 clipping node and throws select clipping branches back to the other D2/D3 node\.
- Manufacturer Name: Alpha Taiwan
- Manufacturer Part Number: SR2612F\-0112\-21R0B\-D8\-N

**Pins:**
- \~ [pin 1]
- \~ [pin 6]
- \~ [pin 2]
- \~ [pin 5]
- \~ [pin 11]
- \~ [pin A]
- \~ [pin 4]
- \~ [pin 9]
- \~ [pin 3]
- \~ [pin 7]
- \~ [pin 12]
- \~ [pin 8]
- \~ [pin 10]

### SW\_GAIN — [100SP1T1B4M2QE](https://flux.ai/adrian95/100sp1t1b4m2qe~535.md)

- Purchase Url: https://stompboxparts\.com/switches/spdt\-toggle\-switch\-on\-on\-solder\-lug\-short\-bat/?searchid=998721&search\_query=on\-on\+switch
- Datasheet URL: https://configured\-product\-images\.s3\.amazonaws\.com/2D/specs/100SP1T1B4M2QE\.pdf
- Role: Mode Select
- Role Details: Represents the selected StompBoxParts SPDT ON\-ON solder\-lug short\-bat toggle for switching a 500k resistor across the Drive pot\.
- Manufacturer Name: E\-Switch
- Manufacturer Part Number: 100SP1T1B4M2QE
- Package or Case Code: 100SP1T1B4M2QE
- License: https://creativecommons\.org/licenses/by/4\.0/
- Part Type: Switch

**Pins:**
- 1 [pin 1]
- 2 [pin 2]
- 3 [pin 3]

### TONE — [PTR901\-2020K\-A103](https://flux.ai/adrian95/ptr901-2020k-a103~bwe.md)

- Resistance: 10kΩ
- Datasheet URL: https://www\.bourns\.com/docs/Product\-Datasheets/PTR90\.pdf
- Package or Case Code: PTR9012020KA103
- Part Type: Potentiometer
- Manufacturer Name: Bourns
- Manufacturer Part Number: PTR901\-2020K\-A103
- Role Details: Mach 1 Tone control, A10K per source BOM\.
- Role: Tone Control

**Pins:**
- CCW [pin 1]
- CW [pin 3]
- SW1 [pin SW1]
- SW2 [pin SW2]
- WIPER [pin 2]

### U1 — [OPA2134UA](https://flux.ai/lcsc/opa2134ua~eg4n.md)

- Part Type: Audio Power OpAmps
- Role: Amplifier
- Manufacturer Name: Texas Instruments
- JLCPCB Part Class: Extended Part
- JLCPCB part number: https://jlcpcb\.com/partdetail/TexasInstruments\-OPA2134UA/C2860321
- Manufacturer Part Number: OPA2134UA
- Datasheet URL: https://www\.ti\.com/lit/ds/symlink/opa134\.pdf?HQS=dis\-dk\-null\-digikeymode\-dsf\-pf\-null\-wwe&ts=1780409655359&ref\_url=https%253A%252F%252Fwww\.nikenele\.com%252Fproduct%252Fpdf%252F%253Furl%253D341264
- Symbol Style: parametric\-v1
- Role Details: Dual audio op amp for input/gain and recovery/output stages\.
- Package or Case Code: SOIC\-8\_L4\.9\-W3\.9\-P1\.27\-LS6\.0\-BL
- License: https://creativecommons\.org/licenses/by/4\.0/

**Pins:**
- \-IN A [pin 2]
- \-IN B [pin 6]
- \+IN A [pin 3]
- \+IN B [pin 7]
- \+IN B [pin 5]
- OUT A [pin 1]
- V\- [pin 4]
- V\+ [pin 8]

### VOL — [PTN16\-A100120K1A1](https://flux.ai/adrian95/ptn16-a100120k1a1~9zw.md)

- Package or Case Code: POT\_PTN16\-A100120K1A1
- Role Details: Mach 1 Volume control, A100K per source BOM\.
- Role: Volume Control
- Manufacturer Part Number: PTN16\-A100120K1A1
- Manufacturer Name: Same Sky \(Formerly CUI Devices\)
- Datasheet URL: https://www\.cuidevices\.com/product/resource/digikeypdf/ptn16\.pdf
- Resistance: 100kΩ
- Part Type: Potentiometer
- License: https://creativecommons\.org/licenses/by/4\.0/

**Pins:**
- 1 [pin 1]
- 2 [pin 2]
- 3 [pin 3]

*The full schematic, PCB layout, bill of materials, and interactive design are available at [https://flux\.ai/scathc2/mach\-1\-clipping\-mod\~cw](https://flux.ai/scathc2/mach-1-clipping-mod~cw).*

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*Generated from [https://flux\.ai/scathc2/mach\-1\-clipping\-mod\~cw](https://flux.ai/scathc2/mach-1-clipping-mod~cw)*