2 layers
T41-Main+RF board V012
DRWJSCHMIDT/T41
This is the repository for the officially released V10, V11, and V12 versions of the T41 Software Defined Transceiver hardware and kits.
255 parts66
4 layers35.1 × 25.3 mm
DualClockLO
DRWJSCHMIDT/T4166This is the repository for the officially released V10, V11, and V12 versions of the T41 Software Defined Transceiver hardware and kits.
- Size
- 35.1 × 25.3 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 24
- Nets
- 22
- Pads
- 90
- Tracks, vias
- 156, 72
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 12 Jan 2024
- Updated
- 10 Oct 2026
Overview
DualClockLO is an open-source printed circuit board by DRWJSCHMIDT, from the DRWJSCHMIDT/T41 repository on GitHub. It is a 4-layer board of 35.1 × 25.3 mm with 24 parts on 22 nets, routed with 156 tracks and 72 vias.
It is built around the SI5351A-B-GM. Its parts include 5 capacitors, 5 connectors, 4 inductors, 3 crystals and 2 resistors.
Main components
1README
README.mdT41_Stuff
This is the repository for the officially released V10, V11, and V12 versions of the T41 Software Defined Transceiver hardware and kits. Please read the areas below to understand this project, order boards, make your own boards, find build part lists (BOMs), order kits, and documentation that supports the T41 project.
What is the T41 project?
Parts
24| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 0.1uF 50V | Capacitor_SMD:C_0603_1608Metric | C1, C2, C3, C4, C5 |
| 4 | FB | Inductor_SMD:L_0603_1608Metric | L1, L2, L3, L4 |
| 2 | 2k2 | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 2 | MountingHole | MountingHole:MountingHole_2.2mm_M2_DIN965 | H1, H2 |
| 2 | pin header | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J3, J4 |
| 1 | 25MHz | Crystal:Crystal_SMD_HC49-SD_HandSoldering | Y2 |
| 1 | ECS-TX053-S3 | T41_Library:Oscillator_ECS_TXO53_S3 | Y1 |
| 1 | GND select | Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | JP1 |
| 1 | OEBSSEN | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J5 |
| 1 | Si5351A-B-GM | Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.7x2.7mm | Y3 |
| 1 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP2 |
| 1 | pin header | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J2 |
| 1 | qwiic | Connector_JST:JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J1 |
| 1 | qwiic_Logo | SparkFun-Qwiic:qwiic_4mm | G1 |
Questions
How big is the DualClockLO PCB?
It measures 35.1 × 25.3 mm and has 4 copper layers, 1.6 mm thick.
What parts does the DualClockLO use?
24 parts, built around the SI5351A-B-GM. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the DualClockLO KiCad files?
From the DRWJSCHMIDT/T41 repository on GitHub, at the commit this page was made from: the board is T41_V012_Files/T41_V012_PCBs/T41_V012_PCBs_KiCad/Old FIles/T41-RF-board-DualClock-daughterboard_V1/DualClockLO.kicad_pcb and its schematic T41_V012_Files/T41_V012_PCBs/T41_V012_PCBs_KiCad/Old FIles/T41-BPF-filter-board-V12.6/T41-exciter-filter-board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the DualClockLO design in my own project?
Its repository states no licence, so its author keeps all rights: ask DRWJSCHMIDT before reusing the design.
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