# 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://www.flux.ai/lcsc/1n5817-t~plig.md) - Mount: Through Hole - JLCPCB Part Class: Extended Part - Manufacturer Part Number: 1N5817-T - Package or Case Code: DO-41_BD2.4-L4.7-P8.70-D0.9-FD - Product Info Url: https://lcsc.com/product-detail/Schottky-Barrier-Diodes-SBD_Diodes-Incorporated-1N5817-T_C507852.html - Role: Protection - Manufacturer Name: DIODES(美台) - Role Details: Through-hole DO-41 9V input reverse-polarity protection diode from Mach 1 BOM. - Part Type: Schottky Barrier Diodes (SBD) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2111021230_Diodes-Incorporated-1N5817-T_C507852.pdf - LCSC Part Number: C507852 **Pins:** - A [pin 1] - K [pin 2] ### D2 — [1N914BTR](https://www.flux.ai/lcsc/1n914btr~j3l2.md) - Manufacturer Name: onsemi(安森美) - Package or Case Code: DO-35_BD2.0-L4.2-P8.20-D0.5-RD - Product Info Url: https://lcsc.com/product-detail/Switching-Diode_ON-Semicon_1N914BTR_ON-Semicon-ON-1N914BTR_C258180.html - Manufacturer Part Number: 1N914BTR - Part Type: Switching Diode - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1809111722_onsemi-1N914BTR_C258180.pdf - LCSC Part Number: C258180 - JLCPCB Part Class: Extended Part - Role Details: Through-hole DO-35 D2/D3 anti-parallel Mach 1 clipping reference pair; D4/D5 omitted and onboard rotary selector is separate. - Role: Clamping - Mount: Through Hole **Pins:** - 1 [pin 1] - 2 [pin 2] ### D3 — [1N914BTR](https://www.flux.ai/lcsc/1n914btr~j3l2.md) - Role Details: Through-hole DO-35 D2/D3 anti-parallel Mach 1 clipping reference pair; D4/D5 omitted and onboard rotary selector is separate. - JLCPCB Part Class: Extended Part - LCSC Part Number: C258180 - Role: Clamping - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1809111722_onsemi-1N914BTR_C258180.pdf - Part Type: Switching Diode - Manufacturer Part Number: 1N914BTR - Product Info Url: https://lcsc.com/product-detail/Switching-Diode_ON-Semicon_1N914BTR_ON-Semicon-ON-1N914BTR_C258180.html - Package or Case Code: DO-35_BD2.0-L4.2-P8.20-D0.5-RD - Manufacturer Name: onsemi(安森美) - Mount: Through Hole **Pins:** - 1 [pin 1] - 2 [pin 2] ### D6 — [1N914BTR](https://www.flux.ai/lcsc/1n914btr~j3l2.md) - Manufacturer Name: onsemi(安森美) - Manufacturer Part Number: 1N914BTR - Product Info Url: https://lcsc.com/product-detail/Switching-Diode_ON-Semicon_1N914BTR_ON-Semicon-ON-1N914BTR_C258180.html - Part Type: Switching Diode - Package or Case Code: DO-35_BD2.0-L4.2-P8.20-D0.5-RD - LCSC Part Number: C258180 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1809111722_onsemi-1N914BTR_C258180.pdf - JLCPCB Part Class: Extended Part - Mount: Through Hole - Role: Clamping - Role Details: Through-hole DO-35 retained D6 clipping diode; D4/D5 intentionally omitted for the onboard rotary clipping selector mod. **Pins:** - 1 [pin 1] - 2 [pin 2] ### DRIVE — [RV16AF-41](https://www.flux.ai/jwwitherspoon/rv16af-41~ue.md) - Mount: Through Hole - Part Type: Potentiometer - 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. - Role: Gain Control - Datasheet URL: https://cdn-blog.adafruit.com/uploads/2022/01/Taiwan-Alpha-16mm-pots-datasheet.pdf - Resistance: 1MΩ **Pins:** - P1 [pin 1] - P2 [pin 2] - P3 [pin 3] ### J_IN — [61300211121](https://www.flux.ai/adrian95/61300211121~11.md) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Würth Elektronik - Manufacturer Part Number: 61300211121 - Role: Input Connector - Role Details: 2-pin offboard input jack connection: signal and ground. - Datasheet URL: https://www.we-online.com/components/products/datasheet/61300211121.pdf **Pins:** - P1 [pin 1] - P2 [pin 2] ### J_OUT — [61300211121](https://www.flux.ai/adrian95/61300211121~11.md) - Manufacturer Part Number: 61300211121 - Datasheet URL: https://www.we-online.com/components/products/datasheet/61300211121.pdf - Role Details: 2-pin offboard output jack connection: signal and ground. - Part Type: Connector - Role: Output Connector - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Würth Elektronik **Pins:** - P1 [pin 1] - P2 [pin 2] ### J_PWR — [61300211121](https://www.flux.ai/adrian95/61300211121~11.md) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Würth Elektronik - Role: Power Input - Manufacturer Part Number: 61300211121 - Datasheet URL: https://www.we-online.com/components/products/datasheet/61300211121.pdf - Role Details: 2-pin offboard 9V DC supply connection: +9V and ground. **Pins:** - P1 [pin 1] - P2 [pin 2] ### J_SW — [61300211121](https://www.flux.ai/adrian95/61300211121~11.md) - Manufacturer Part Number: 61300211121 - Role Details: Offboard footswitch/status LED switch connection representation. - Datasheet URL: https://www.we-online.com/components/products/datasheet/61300211121.pdf - Role: Switch Connector - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Manufacturer Name: Würth Elektronik **Pins:** - P1 [pin 1] - P2 [pin 2] ### LED1 — [LTL-307EE](https://www.flux.ai/vasy_skral/ltl-307ee~a2.md) - Part Type: LED - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/1153/LTL-307EE.pdf - Role Details: Pedal status LED driven through R100 and footswitch/switch pad. - Role: Indicator - Manufacturer Name: Lite-On Inc. - Manufacturer Part Number: LTL-307EE **Pins:** - A [pin 2] - K [pin 1] ### SW_CLIP — [SR2612F-0112-21R0B-D8-N](https://www.flux.ai/vasyl/sr2612f-0112-21r0b-d8-n~wms.md) - 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. - Role: Clipping selector - Datasheet URL: https://www.snapeda.com/parts/SR2612F-0112-21R0B-D8-N/Alpha%20Taiwan/datasheet/ - Manufacturer Part Number: SR2612F-0112-21R0B-D8-N - Part Type: Switch - Manufacturer Name: Alpha Taiwan - Mount: Through Hole **Pins:** - ~ [pin 7] - ~ [pin A] - ~ [pin 1] - ~ [pin 8] - ~ [pin 12] - ~ [pin 3] - ~ [pin 10] - ~ [pin 5] - ~ [pin 9] - ~ [pin 2] - ~ [pin 6] - ~ [pin 11] - ~ [pin 4] ### SW_GAIN — [100SP1T1B4M2QE](https://www.flux.ai/adrian95/100sp1t1b4m2qe~535.md) - License: https://creativecommons.org/licenses/by/4.0/ - Purchase Url: https://stompboxparts.com/switches/spdt-toggle-switch-on-on-solder-lug-short-bat/?searchid=998721&search_query=on-on+switch - Part Type: Switch - Manufacturer Name: E-Switch - Role: Mode Select - Datasheet URL: https://configured-product-images.s3.amazonaws.com/2D/specs/100SP1T1B4M2QE.pdf - Role Details: Represents the selected StompBoxParts SPDT ON-ON solder-lug short-bat toggle for switching a 500k resistor across the Drive pot. - Manufacturer Part Number: 100SP1T1B4M2QE - Package or Case Code: 100SP1T1B4M2QE **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### TONE — [PTR901-2020K-A103](https://www.flux.ai/adrian95/ptr901-2020k-a103~bwe.md) - Resistance: 10kΩ - Role: Tone Control - Part Type: Potentiometer - Role Details: Mach 1 Tone control, A10K per source BOM. - Package or Case Code: PTR9012020KA103 - Datasheet URL: https://www.bourns.com/docs/Product-Datasheets/PTR90.pdf - Manufacturer Part Number: PTR901-2020K-A103 - Manufacturer Name: Bourns **Pins:** - CCW [pin 1] - CW [pin 3] - SW1 [pin SW1] - SW2 [pin SW2] - WIPER [pin 2] ### U1 — [OPA2134UA](https://www.flux.ai/lcsc/opa2134ua~eg4n.md) - Part Type: Audio Power OpAmps - 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 - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Texas Instruments - JLCPCB part number: https://jlcpcb.com/partdetail/TexasInstruments-OPA2134UA/C2860321 - Role: Amplifier - Role Details: Dual audio op amp for input/gain and recovery/output stages. - Manufacturer Part Number: OPA2134UA - Package or Case Code: SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL - JLCPCB Part Class: Extended Part - Symbol Style: parametric-v1 **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://www.flux.ai/adrian95/ptn16-a100120k1a1~9zw.md) - Role Details: Mach 1 Volume control, A100K per source BOM. - License: https://creativecommons.org/licenses/by/4.0/ - Package or Case Code: POT_PTN16-A100120K1A1 - Manufacturer Part Number: PTN16-A100120K1A1 - Datasheet URL: https://www.cuidevices.com/product/resource/digikeypdf/ptn16.pdf - Role: Volume Control - Resistance: 100kΩ - Part Type: Potentiometer - Manufacturer Name: Same Sky (Formerly CUI Devices) **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://www.flux.ai/scathc2/mach-1-clipping-mod~cw](https://www.flux.ai/scathc2/mach-1-clipping-mod~cw).* --- *Generated from [https://www.flux.ai/scathc2/mach-1-clipping-mod~cw](https://www.flux.ai/scathc2/mach-1-clipping-mod~cw)*