# 170-27 MHz LoRa Converter ## Description 2-layer 170 MHz ↔ 27 MHz bidirectional LoRa converter using SBL-1+ passive mixer and Si5351A LO ## Project Details - **Owner:** jadestarwatcher - **Created:** 5/18/2026 - **Last Updated:** 5/18/2026 - **Visibility:** Public ## Key Components ### D1 — [WP1384AD/ID](https://www.flux.ai/cherepanyadima/wp1384adid~2t.md) - Role Details: 5V power indicator LED, used with 470 ohm series resistor R4. - Part Type: LED - Manufacturer Part Number: WP1384AD/ID - Manufacturer Name: Kingbright - Role: Current Limiting - Datasheet URL: https://www.kingbrightusa.com/images/catalog/SPEC/WP934AD-ID.pdf **Pins:** - ~ [pin 2] - ~ [pin 1] ### J1 — [SMA-J-P-H-ST-EM1](https://www.flux.ai/jecstronic/sma-j-p-h-st-em1~0a1.md) - Manufacturer Part Number: CONSMA020.062-G - Role Details: 50 ohm edge-launch SMA input/output to Ikoka MeshCore stick; substitute footprint for TE CONSMA020.062-G pending exact part. - Role: RF Tuning / Matching - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: http://suddendocs.samtec.com/catalog_english/sma.pdf - Manufacturer Name: TE Connectivity - Part Type: Connector **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### J2 — [SMA-J-P-H-ST-EM1](https://www.flux.ai/jecstronic/sma-j-p-h-st-em1~0a1.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: http://suddendocs.samtec.com/catalog_english/sma.pdf - Manufacturer Name: TE Connectivity - Part Type: Connector - Role Details: 50 ohm edge-launch SMA input/output to 27 MHz antenna; substitute footprint for TE CONSMA020.062-G pending exact part. - Manufacturer Part Number: CONSMA020.062-G - Role: RF Tuning / Matching **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### J3 — [Pin Header 02x15 2.54mm Vertical](https://www.flux.ai/adrian95/pin-header-02x15-254mm-vertical~wxm.md) - Part Type: Connector - Manufacturer Name: Arduino - Role Details: 2x15 Arduino Nano Every footprint for temporary I2C programming; label PROG ONLY - REMOVE AFTER PROGRAMMING. - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: ABX00033 - Role: Signal Generation **Pins:** - Pin_1 [pin 1] - Pin_10 [pin 10] - Pin_11 [pin 11] - Pin_12 [pin 12] - Pin_13 [pin 13] - Pin_14 [pin 14] - Pin_15 [pin 15] - Pin_16 [pin 16] - Pin_17 [pin 17] - Pin_18 [pin 18] - Pin_19 [pin 19] - Pin_2 [pin 2] - Pin_20 [pin 20] - Pin_21 [pin 21] - Pin_22 [pin 22] - Pin_23 [pin 23] - Pin_24 [pin 24] - Pin_25 [pin 25] - Pin_26 [pin 26] - Pin_27 [pin 27] - Pin_28 [pin 28] - Pin_29 [pin 29] - Pin_3 [pin 3] - Pin_30 [pin 30] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] - Pin_9 [pin 9] ### J4 — [S2B-PH-K-S(LF)(SN)](https://www.flux.ai/adrian95/s2b-ph-k-slfsn~brb.md) - Part Type: Connector - Manufacturer Name: JST - Datasheet URL: https://www.jst-mfg.com/product/pdf/eng/ePH.pdf - Role Details: JST-PH 2-pin connector for external +5V IN and GND. - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: S2B-PH-K-S(LF)(SN) - Role: Power Conversion **Pins:** - P1 [pin 1] - P2 [pin 2] ### U1 — [Connector 01x08 0.100](https://www.flux.ai/vasy_skral/connector-01x08-0100~q3l.md) - Role Details: Mini-Circuits SBL-1+ passive double-balanced mixer placeholder: pins 1 RF+, 2 GND, 3 IF+, 4 GND, 5 LO+, 6 GND, 7 GND, 8 GND. - Manufacturer Part Number: SBL-1+ - Part Type: Connector - Package or Case Code: SOT-115 / Micro-X 8-lead placeholder - Manufacturer Name: Mini-Circuits - Role: Signal Mixing / Detection - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] ### U2 — [Pin Header 01x06 2.54mm Vertical](https://www.flux.ai/adrian95/pin-header-01x06-2p54mm-vertical~lzd.md) - Manufacturer Name: Adafruit - License: https://creativecommons.org/licenses/by/4.0/ - Role: Signal Generation - Role Details: Adafruit 5640 Si5351A breakout header: VIN, GND, SDA, SCL, CLK0, spare. - Manufacturer Part Number: 5640 - Part Type: Connector **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/jadestarwatcher/170-27-mhz-lora-converter~ej](https://www.flux.ai/jadestarwatcher/170-27-mhz-lora-converter~ej).* --- *Generated from [https://www.flux.ai/jadestarwatcher/170-27-mhz-lora-converter~ej](https://www.flux.ai/jadestarwatcher/170-27-mhz-lora-converter~ej)*