4 layers99.1 × 99.1 mm
TACNPR
partio-scout/scoms-tacnpr
TACNPR by Scoms -- Open hardware high-speed Ethernet/IP data radio for the 433 MHz HAM band, binary-compatible with the original NPR by F4HDK.
310 parts9
4 layers40 × 40 mm
Pre filter
dfdtc/RMUC2026_RF14This is the pubilc repository of BNBU 2026 RMUC RF part of Radar
- Size
- 40 × 40 mm
- Copper layers
- 4
- Thickness
- 1.61 mm
- Parts
- 23
- Nets
- 13
- Pads
- 78
- Tracks, vias
- 38, 150
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 20 Mar 2026
- Updated
- 7 Sep 2026
Overview
Pre filter is an open-source printed circuit board by dfdtc, from the dfdtc/RMUC2026_RF repository on GitHub, published under the GPL-3.0 licence. It is a 4-layer board of 40 × 40 mm with 23 parts on 13 nets, routed with 38 tracks and 150 vias.
It is built around the QPL9547, M2.5 and B39431B3710U410, with the SMF6V0A among its other parts. Its parts include 6 capacitors, 4 connectors, 3 resistors, 1 IC and 1 diode.
Main components
4
QPL9547
DFN-8(2x2)-40℃~+105℃ 0.3dB 19.5dB 22.7dBm 3.15V~5.25V DFN-8(2x2) Low Noise Amplifiers (LNA) - RF ROHSQorvoLow Noise Amplifiers (LNA) - RFM2.5
-0.45mm 2.5mm 2mm 5mm DIN934 Hex M2.5X0.45 Nickel plated Silver white - Hexagonal nutsShuntianHex Nut
B39431B3710U410
SMD3030-6P-40℃~+85℃ 1.7MHz 2dB 433.92MHz 50Ω SMD3030-6P SAW Filters ROHSQualcommSAW Filters
SMF6V0A
SOD-123SOD-123 ESD and Surge Protection (TVS/ESD) ROHSFUXINSEMIUncategorised
README
Hardware/BPF_LNA/README.md简介
这是一个简单的预选带通滤波器+LNA，关键器件是带通SAW滤波器B39431B3710U410，和LNA QPL9547；
本设计期望使用一个比较优质的前置低噪声，降低系统噪声系数，使用预选滤波器，尽可能避免带外大信号干扰（但注意，无法过滤干扰源信号）；
本设计由TypeC供电5V，实测工作功率<1W，支持从GH1.25受电或给其他设备串联供电，如果不需要可以不焊接。Tips
SMA是板侧装*宽脚*型，普通型号可能勉强能安装，但是不太推荐。TODO
屏蔽外壳还未完成，完成后可以使用SMA-KF，目前模型有问题，TypeC和螺纹开孔位置不对，欢迎贡献。Parts
23| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 100p | Capacitor_SMD:C_0402_1005Metric | C3, C4, C6, C7, C8 |
| 4 | M2.5 | MountingHole:MountingHole_2.7mm_M2.5_DIN965_Pad_TopBottom | H1, H2, H3, H4 |
| 2 | 5.1k | Resistor_SMD:R_0402_1005Metric | R3, R4 |
| 2 | Conn_Coaxial | Connector_Coaxial:SMA_Amphenol_132289_EdgeMount | J1, J2 |
| 1 | 120ohm | Capacitor_SMD:C_0805_2012Metric | FB1 |
| 1 | 18n | Inductor_SMD:L_0402_1005Metric | L1 |
| 1 | 1u | Capacitor_SMD:C_0805_2012Metric | C5 |
| 1 | 3.32k | Resistor_SMD:R_0402_1005Metric | R2 |
| 1 | 500ma PPTC | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | B39431B3710U410 | Filter:Filter_SAW_Epcos_DCC6C_3x3mm | X1 |
| 1 | GH1.25_H | Connector_JST:JST_GH_SM02B-GHS-TB_1x02-1MP_P1.25mm_Horizontal | J4 |
| 1 | QPL9547 | Package_DFN_QFN:DFN-8-1EP_2x2mm_P0.5mm_EP0.8x1.6mm | U1 |
| 1 | SMF6V0A | Diode_SMD:D_SMF | D1 |
| 1 | USB_C_6P | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-17 | J3 |
Questions
How big is the Pre filter PCB?
It measures 40 × 40 mm and has 4 copper layers, 1.61 mm thick.
What parts does the Pre filter use?
23 parts, built around the QPL9547, M2.5, B39431B3710U410 and SMF6V0A. 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 Pre filter KiCad files?
From the dfdtc/RMUC2026_RF repository on GitHub, at the commit this page was made from: the board is Hardware/BPF_LNA/pre_filter.kicad_pcb and its schematic Hardware/BPF_LNA/pre_filter.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Pre filter design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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