# 6m-40m Linear Amplifier ## Description 100 W, 7–55 MHz Broadband Class‑AB RF Power Amplifier for Yaesu FT‑818 with 50 Ω I/O, 13.8 V/15 A Supply, Relay T/R Switching, PTT/ALC Interface, Selectable 5th‑Order Chebyshev LPF Bank, and Overtemperature‑Controlled Fan Support ## Project Details - **Owner:** boothg599 - **Created:** 9/29/2023 - **Last Updated:** 1/10/2026 - **Visibility:** Public - **Board Outline Height:** 150mm - **Board Outline Width:** 150mm - **System Architecture:** flowchart TD Power["Power Distribution"] InputPad["5W Input Pad"] Driver["Driver (U1)"] PreDriver["Pre-driver (U2)"] FinalStage["Final RF Transistor Stage"] TRSwitch["Relay T/R Switch"] LPFBank["Selectable LPF Bank"] RFIO["RF I/O"] Coupler["Directional Coupler & Detectors (U4)"] Protections["Protection Circuits\n(SWR, Overcurrent, Overtemperature)"] Interface["PTT/ALC Interface"] Power --> Driver Power --> PreDriver Power --> FinalStage Power --> TRSwitch Power --> Coupler Power --> LPFBank Power --> Interface InputPad --> Driver --> PreDriver --> FinalStage --> TRSwitch --> LPFBank --> RFIO FinalStage --> Coupler Coupler --> Protections Protections --> Interface Interface --> TRSwitch - **Design Constraints:** Supply: 13.8 V DC @ 15 A max; Drive: 1 W typical, 5 W max; T/R switching: relays; Cooling: external heatsink + fan ≤ 150 mm. - **Gain (5 W→100 W):** 13.01dB - **Gain (1 W→100 W):** 20dB - **Stars:** 1 ## Key Components ### D1 — [RN141CMT2R](https://www.flux.ai/adrian95/rn141cmt2r~gc9.md) - Role Details: T/R switching PIN diode - Role: T/R switch - Part Type: Diode - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: RN141CMT2R - Datasheet URL: https://fscdn.rohm.com/en/products/databook/datasheet/discrete/diode/pin/rn141cmt2r-e.pdf - Manufacturer Name: Rohm Semiconductor **Pins:** - A1 [pin 1] - A2 [pin 2] ### D2 — [SS14](https://www.flux.ai/jecstronic/ss14~ri4.md) - Voltage Rating: 16.56V - Manufacturer Part Number: SS14 - Manufacturer Name: Slkor(SLKORMICRO Elec.) - Role: Protection - Package: DO-214AC - Part Type: Diode - Role Details: Reverse-polarity protection for DC input - Datasheet URL: https://datasheet.lcsc.com/lcsc/1912111437_Slkor-SLKORMICRO-Elec--SS14_C444721.pdf - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - Anode [pin A] - Cathode [pin C] ### D2 — [SS14](https://www.flux.ai/jecstronic/ss14~ri4.md) - Manufacturer Part Number: SS14 - Role: Protection - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Slkor(SLKORMICRO Elec.) - Datasheet URL: https://datasheet.lcsc.com/lcsc/1912111437_Slkor-SLKORMICRO-Elec--SS14_C444721.pdf - Part Type: Diode - Role Details: Input protection diode (reverse-polarity) **Pins:** - Anode [pin A] - Cathode [pin C] ### D3 — [SS14](https://www.flux.ai/jecstronic/ss14~ri4.md) - Manufacturer Part Number: SS14 - Voltage Rating: 16.56V - Manufacturer Name: Slkor(SLKORMICRO Elec.) - Role Details: Reverse-polarity protection for input power rail - Package: DO-214AC - License: https://creativecommons.org/licenses/by/4.0/ - Role: Reverse Polarity Protection - Part Type: Diode - Datasheet URL: https://datasheet.lcsc.com/lcsc/1912111437_Slkor-SLKORMICRO-Elec--SS14_C444721.pdf **Pins:** - Anode [pin A] - Cathode [pin C] ### J1 — [PJ-051AH](https://www.flux.ai/vasy_skral/pj-051ah~yy8.md) - Manufacturer Name: CUI Devices - Manufacturer Part Number: PJ-051AH - Datasheet URL: https://www.cuidevices.com/product/resource/digikeypdf/pj-051ah.pdf - Role Details: 13.8 V DC input - Package: Right Angle Through-Hole Jack - Role: Connector - Part Type: Connector **Pins:** - Center Pin [pin 1] - MountPin [pin MP1] - MountPin [pin MP2] - Switch [pin 3] - Terminal [pin 2] ### J2 — [142-0701-801](https://www.flux.ai/adrian95/142-0701-801~8ox.md) - Role Details: RF Input 50 Ω - Connector Type: RF / Coaxial Connectors - Role: Connector - Manufacturer Part Number: 142-0701-801 - Datasheet URL: http://www.farnell.com/datasheets/2048966.pdf - Package or Case Code: 142-0701-851 - Manufacturer Name: Cinch Connectivity Solutions - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### J3 — [SMA-J-P-H-ST-EM1](https://www.flux.ai/jecstronic/sma-j-p-h-st-em1~0a1.md) - Manufacturer Part Number: SMA-J-P-H-ST-EM1 - Datasheet URL: http://suddendocs.samtec.com/catalog_english/sma.pdf - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: RF Output 50 Ω - Role: Connector - Manufacturer Name: Samtec Inc. **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] ### J4 — [2-644861-2](https://www.flux.ai/adrian95/2-644861-2~vfq.md) - Manufacturer Name: TE Connectivity AMP Connectors - Part Type: Connector - Datasheet URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=644861&DocType=Customer+Drawing&DocLang=English&PartCntxt=2-644861-2&DocFormat=pdf - Role: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: PTT and ALC input control - Manufacturer Part Number: 2-644861-2 **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] ### J5 — [2-644861-2](https://www.flux.ai/adrian95/2-644861-2~vfq.md) - Part Type: Connector - Role: Connector - Datasheet URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=644861&DocType=Customer+Drawing&DocLang=English&PartCntxt=2-644861-2&DocFormat=pdf - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: 2-644861-2 - Role Details: PTT and ALC input control - Manufacturer Name: TE Connectivity AMP Connectors **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] ### J6 — [0901301106](https://www.flux.ai/adrian95/0901301106~t1x.md) - Datasheet URL: https://tools.molex.com/pdm_docs/sd/901301106_sd.pdf - Role: Connector - Manufacturer Part Number: 0901301106 - Manufacturer Name: Molex - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: LPF band-select control - Part Type: Connector **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] ### J7 — [2-644861-2](https://www.flux.ai/adrian95/2-644861-2~vfq.md) - Manufacturer Part Number: 2-644861-2 - License: https://creativecommons.org/licenses/by/4.0/ - Role Details: Fan power header - Datasheet URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=644861&DocType=Customer+Drawing&DocLang=English&PartCntxt=2-644861-2&DocFormat=pdf - Package: 2-pin through-hole header 2.54mm - Part Type: Connector - Role: Connector - Manufacturer Name: TE Connectivity AMP Connectors **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] ### K1 — [ACJ2112](https://www.flux.ai/jecstronic/acj2112~k7.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Relay - Datasheet URL: https://www3.panasonic.biz/ac/e_download/control/relay/vehicle/catalog/mech_eng_cj.pdf - Role Details: Transmit/Receive switching relay - Role: Relay - Manufacturer Part Number: ACJ2112 - Manufacturer Name: Panasonic Corp. **Pins:** - COIL_1 [pin 1] - COIL_2 [pin 2] - COIL_3 [pin 3] - COIL_4 [pin 4] - COM_1 [pin 7] - COM_2 [pin 8] - NC [pin 5] - NO [pin 6] ### K2 — [AGN200A12Z](https://www.flux.ai/lcsc/agn200a12z~ykv.md) - Role: Relay - Package or Case Code: RELAY-SMD_AGN200A4HZ_C2153090 - Role Details: RF LPF filter selection relay - Manufacturer Name: PANASONIC(松下) - Package: SOIC-8_L5.0-W4.0-P1.27-LS6.0-BL - Part Type: Signal Relays - JLCPCB Part Class: Extended Part - Manufacturer Part Number: AGN200A12Z - LCSC Part Number: C2858036 **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] - 7 [pin 7] - 8 [pin 8] ### Q1 — [2N3904](https://www.flux.ai/adrian95/2n3904~a6d.md) - Role: Switching - Voltage Rating: 16.56V - License: https://creativecommons.org/licenses/by/4.0/ - Package: TO-92 - Part Type: Transistor - Manufacturer Name: NTE Electronics, Inc - Role Details: PTT interface transistor for relay drive - Datasheet URL: https://www.nteinc.com/specs/original/2N3904.pdf - Manufacturer Part Number: 2N3904 **Pins:** - B [pin 2] - C [pin 3] - E [pin 1] ### U1 — [BFP520H6327](https://www.flux.ai/lcsc/bfp520h6327~bfw.md) - Role Details: Predriver transistor - LCSC Part Number: C439779 - Manufacturer Name: Infineon(英飞凌) - Manufacturer Part Number: BFP520H6327 - Part Type: Bipolar Transistors - BJT - Role: Amplification - Package or Case Code: SOT-343-4_L2.0-W1.3-P1.30-LS2.1-BR - Voltage Rating: 16.56V - JLCPCB Part Class: Extended Part **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] - E [pin 4] ### U1 — [BD50GA3WEFJ-E2](https://www.flux.ai/lcsc/bd50ga3wefj-e2~9b1.md) - Role: Amplification - Role Details: Final RF power transistor - Manufacturer Part Number: BD50GA3WEFJ-E2 - Package or Case Code: HTSOP-J8_L4.9-W3.9-P1.27-LS6.0-BL-EP - Manufacturer Name: ROHM(罗姆) - JLCPCB Part Class: Extended Part - LCSC Part Number: C509752 **Pins:** - EN [pin 5] - EP [pin 9] - GND [pin 3] - NC [pin 4] - NC [pin 6] - NC [pin 7] - Vcc [pin 8] - Vo [pin 1] - Vo_s [pin 2] ### U1 — [BFP520H6327](https://www.flux.ai/lcsc/bfp520h6327~bfw.md) - Manufacturer Name: Infineon(英飞凌) - Manufacturer Part Number: BFP520H6327 - Part Type: Bipolar Transistors - BJT - Package or Case Code: SOT-343-4_L2.0-W1.3-P1.30-LS2.1-BR - Role: Amplification - JLCPCB Part Class: Extended Part - Role Details: Driver transistor - LCSC Part Number: C439779 **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] - E [pin 4] ### U10 — [ADC-10-1R](https://www.flux.ai/vasy_skral/adc-10-1r~4gk.md) - Role Details: External directional coupler for forward/reflected power detection - Package: 6-SMD, Flat Leads - Manufacturer Name: Mini-Circuits - Voltage Rating: 16.56V - Datasheet URL: https://www.minicircuits.com/pdfs/ADC-10-1R.pdf - Role: RF Coupling - Part Type: RF - Manufacturer Part Number: ADC-10-1R **Pins:** - CPL [pin 3] - GND [pin 2] - GND [pin 5] - IN [pin 1] - NC [pin 4] - OUT [pin 6] ### U11 — [ULN2003A](https://www.flux.ai/adrian95/uln2003a~0lo.md) - Role: Relay Coil Driver - Manufacturer Part Number: ULN2003A - Role Details: Coil driver for LPF_CTRL signals - Manufacturer Name: STMicroelectronics - Package: DIP-16 - Part Type: Integrated Circuit - Datasheet URL: https://www.st.com/content/ccc/resource/technical/document/datasheet/f3/6e/c8/64/4d/b3/4e/38/CD00001244.pdf/files/CD00001244.pdf/jcr:content/translations/en.CD00001244.pdf - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - COM [pin 9] - GND [pin 8] - I1 [pin 1] - I2 [pin 2] - I3 [pin 3] - I4 [pin 4] - I5 [pin 5] - I6 [pin 6] - I7 [pin 7] - O1 [pin 16] - O2 [pin 15] - O3 [pin 14] - O4 [pin 13] - O5 [pin 12] - O6 [pin 11] - O7 [pin 10] ### U12 — [FAN3122CMX-F085](https://www.flux.ai/lcsc/fan3122cmx-f085~qx7h.md) - Package: SOIC-8_L5.0-W4.0-P1.27-LS6.0-BL - LCSC Part Number: C903472 - JLCPCB Part Class: Extended Part - Role Details: Overtemperature-controlled fan driver via PROT_CTRL - Manufacturer Name: onsemi(安森美) - Role: Fan Driver - Package or Case Code: SOIC-8_L5.0-W4.0-P1.27-LS6.0-BL - Part Type: Gate Drive ICs - Manufacturer Part Number: FAN3122CMX-F085 **Pins:** - EN [pin 3] - GND [pin 4] - GND [pin 5] - IN [pin 2] - OUT [pin 6] - OUT [pin 7] - VDD [pin 1] - VDD [pin 8] ### U2 — [BD50GA3WEFJ-E2](https://www.flux.ai/lcsc/bd50ga3wefj-e2~9b1.md) - Role: Amplification - JLCPCB Part Class: Extended Part - LCSC Part Number: C509752 - Voltage Rating: 16.56V - Role Details: Final RF power transistor - Manufacturer Part Number: BD50GA3WEFJ-E2 - Package or Case Code: HTSOP-J8_L4.9-W3.9-P1.27-LS6.0-BL-EP - Manufacturer Name: ROHM(罗姆) **Pins:** - EN [pin 5] - EP [pin 9] - GND [pin 3] - NC [pin 4] - NC [pin 6] - NC [pin 7] - Vcc [pin 8] - Vo [pin 1] - Vo_s [pin 2] ### U2 — [BFP 420 H6740](https://www.flux.ai/lcsc/bfp-420-h6740~pr7.md) - Package or Case Code: PG-SOT343-4_L2.0-W1.3-P1.30-LS2.1-BL - Role: Amplification - Manufacturer Name: Infineon(英飞凌) - Manufacturer Part Number: BFP 420 H6740 - Role Details: Driver transistor - LCSC Part Number: C534090 **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] - E [pin 4] ### U2 — [BFP 420 H6740](https://www.flux.ai/lcsc/bfp-420-h6740~pr7.md) - LCSC Part Number: C534090 - Role: Amplification - Package or Case Code: PG-SOT343-4_L2.0-W1.3-P1.30-LS2.1-BL - Manufacturer Name: Infineon(英飞凌) - Role Details: Pre-driver transistor - Manufacturer Part Number: BFP 420 H6740 **Pins:** - B [pin 1] - C [pin 3] - E [pin 2] - E [pin 4] ### U3 — [BD50GA3WEFJ-E2](https://www.flux.ai/lcsc/bd50ga3wefj-e2~9b1.md) - Package or Case Code: HTSOP-J8_L4.9-W3.9-P1.27-LS6.0-BL-EP - Manufacturer Name: ROHM(罗姆) - Manufacturer Part Number: BD50GA3WEFJ-E2 - LCSC Part Number: C509752 - JLCPCB Part Class: Extended Part - Role: Amplification - Voltage Rating: 16.56V - Role Details: Final RF transistor **Pins:** - EN [pin 5] - EP [pin 9] - GND [pin 3] - NC [pin 4] - NC [pin 6] - NC [pin 7] - Vcc [pin 8] - Vo [pin 1] - Vo_s [pin 2] ### U4 — [AD8361ARMZ](https://www.flux.ai/lcsc/ad8361armz~0iuy.md) - Role: Feedback - Manufacturer Part Number: AD8361ARMZ - LCSC Part Number: C578709 - JLCPCB Part Class: Extended Part - Role Details: ALC controller - Package or Case Code: MSOP-8_L3.0-W3.0-P0.65-LS4.9-BL - Manufacturer Name: ADI(亚德诺) - Voltage Rating: 16.56V **Pins:** - COMM [pin 5] - FLTR [pin 6] - IREF [pin 2] - PWDN [pin 4] - RFIN [pin 3] - SREF [pin 8] - VPOS [pin 1] - VRMS [pin 7] ### U4 — [AD8361ARMZ](https://www.flux.ai/lcsc/ad8361armz~0iuy.md) - JLCPCB Part Class: Extended Part - Role: Signal Mixing / Detection - Manufacturer Part Number: AD8361ARMZ - LCSC Part Number: C578709 - Role Details: Directional coupler detector IC - Manufacturer Name: ADI(亚德诺) - Package or Case Code: MSOP-8_L3.0-W3.0-P0.65-LS4.9-BL **Pins:** - COMM [pin 5] - FLTR [pin 6] - IREF [pin 2] - PWDN [pin 4] - RFIN [pin 3] - SREF [pin 8] - VPOS [pin 1] - VRMS [pin 7] ### U5 — [MC74HC4053ADR2G](https://www.flux.ai/lcsc/mc74hc4053adr2g~brx5.md) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2409302136_onsemi-MC74HC4053ADR2G_C233611.pdf - Manufacturer Name: onsemi(安森美) - Role: Switching - JLCPCB Part Class: Extended Part - Product Info Url: https://lcsc.com/product-detail/Others_ON-Semicon_MC74HC4053ADR2G_ON-Semicon-ON-MC74HC4053ADR2G_C233611.html - Manufacturer Part Number: MC74HC4053ADR2G - Package or Case Code: SOIC-16_L9.9-W3.9-P1.27-LS6.0-BL - Role Details: LPF switch controller - Part Type: 74 Series - LCSC Part Number: C233611 - Voltage Rating: 16.56V **Pins:** - A [pin 11] - B [pin 10] - C [pin 9] - EN [pin 6] - GND [pin 8] - VCC [pin 16] - VEE [pin 7] - X [pin 14] - X0 [pin 12] - X1 [pin 13] - Y [pin 15] - Y0 [pin 2] - Y1 [pin 1] - Z [pin 4] - Z0 [pin 5] - Z1 [pin 3] ### U5 — [MC74HC4053ADR2G](https://www.flux.ai/lcsc/mc74hc4053adr2g~brx5.md) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2409302136_onsemi-MC74HC4053ADR2G_C233611.pdf - Role Details: RF switch - Manufacturer Name: onsemi(安森美) - Role: Switching - Product Info Url: https://lcsc.com/product-detail/Others_ON-Semicon_MC74HC4053ADR2G_ON-Semicon-ON-MC74HC4053ADR2G_C233611.html - JLCPCB Part Class: Extended Part - Manufacturer Part Number: MC74HC4053ADR2G - Package or Case Code: SOIC-16_L9.9-W3.9-P1.27-LS6.0-BL - Part Type: 74 Series - LCSC Part Number: C233611 **Pins:** - A [pin 11] - B [pin 10] - C [pin 9] - EN [pin 6] - GND [pin 8] - VCC [pin 16] - VEE [pin 7] - X [pin 14] - X0 [pin 12] - X1 [pin 13] - Y [pin 15] - Y0 [pin 2] - Y1 [pin 1] - Z [pin 4] - Z0 [pin 5] - Z1 [pin 3] ### U6 — [TMP36FSZ](https://www.flux.ai/lcsc/tmp36fsz~ugsk.md) - Manufacturer Part Number: TMP36FSZ - Voltage Rating: 16.56V - JLCPCB Part Class: Extended Part - Manufacturer Name: ADI(亚德诺) - LCSC Part Number: C581321 - Role: Sensor - Package or Case Code: SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL - Role Details: Temperature sensor for overtemperature protection **Pins:** - +VS [pin 8] - ~{SHUTDOWN} [pin 5] - GND [pin 4] - NC [pin 2] - NC [pin 3] - NC [pin 6] - NC [pin 7] - VOUT [pin 1] ### U6 — [TMP36FSZ](https://www.flux.ai/lcsc/tmp36fsz~ugsk.md) - Manufacturer Name: ADI(亚德诺) - Role: Sensor - JLCPCB Part Class: Extended Part - Role Details: Temperature sensor for overtemperature protection - Package or Case Code: SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL - LCSC Part Number: C581321 - Manufacturer Part Number: TMP36FSZ **Pins:** - +VS [pin 8] - ~{SHUTDOWN} [pin 5] - GND [pin 4] - NC [pin 2] - NC [pin 3] - NC [pin 6] - NC [pin 7] - VOUT [pin 1] ### U7 — [LM393DMR2G](https://www.flux.ai/lcsc/lm393dmr2g~zbv6.md) - JLCPCB Part Class: Extended Part - Manufacturer Name: onsemi(安森美) - Voltage Rating: 16.56V - Role: Comparator - LCSC Part Number: C231851 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2210210200_onsemi-LM393DMR2G_C231851.pdf - Role Details: Overtemperature and overcurrent threshold detection - Product Info Url: https://lcsc.com/product-detail/Analog-Comparators_ON-Semicon_LM393DMR2G_ON-Semicon-ON-LM393DMR2G_C231851.html - Part Type: Comparators - Package or Case Code: MSOP-8_L3.0-W3.0-P0.65-LS5.0-BL - Manufacturer Part Number: LM393DMR2G **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 5 [pin 5] - 6 [pin 6] - 7 [pin 7] - GND [pin 4] - VDD [pin 8] ### U7 — [LM393DMR2G](https://www.flux.ai/lcsc/lm393dmr2g~zbv6.md) - Manufacturer Name: onsemi(安森美) - JLCPCB Part Class: Extended Part - Product Info Url: https://lcsc.com/product-detail/Analog-Comparators_ON-Semicon_LM393DMR2G_ON-Semicon-ON-LM393DMR2G_C231851.html - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2210210200_onsemi-LM393DMR2G_C231851.pdf - LCSC Part Number: C231851 - Manufacturer Part Number: LM393DMR2G - Role: Comparator - Package or Case Code: MSOP-8_L3.0-W3.0-P0.65-LS5.0-BL - Part Type: Comparators - Role Details: Overtemperature and overcurrent threshold detection **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 5 [pin 5] - 6 [pin 6] - 7 [pin 7] - GND [pin 4] - VDD [pin 8] ### U8 — [ACS71240LLCBTR-030B3](https://www.flux.ai/lcsc/acs71240llcbtr-030b3~j8tj.md) - Role Details: Current sensor for overcurrent protection - JLCPCB Part Class: Extended Part - LCSC Part Number: C2654896 - Role: Sensor - Part Type: Current Sensors - Voltage Rating: 16.56V - Manufacturer Part Number: ACS71240LLCBTR-030B3 - Manufacturer Name: ALLEGRO(美国埃戈罗) - Package or Case Code: SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL **Pins:** - ~{FAULT} [pin 6] - GND [pin 5] - IP– [pin 3] - IP– [pin 4] - IP+ [pin 1] - IP+ [pin 2] - VCC [pin 8] - VIOUT [pin 7] ### U8 — [ACS71240LLCBTR-030B3](https://www.flux.ai/lcsc/acs71240llcbtr-030b3~j8tj.md) - LCSC Part Number: C2654896 - Role: Sensor - Role Details: Current sensor for overcurrent protection - JLCPCB Part Class: Extended Part - Manufacturer Name: ALLEGRO(美国埃戈罗) - Package or Case Code: SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL - Part Type: Current Sensors - Manufacturer Part Number: ACS71240LLCBTR-030B3 **Pins:** - ~{FAULT} [pin 6] - GND [pin 5] - IP– [pin 3] - IP– [pin 4] - IP+ [pin 1] - IP+ [pin 2] - VCC [pin 8] - VIOUT [pin 7] ### U9 — [4N35](https://www.flux.ai/lcsc/4n35~nmtj.md) - Voltage Rating: 16.56V - Package or Case Code: DIP-6_L7.3-W6.5-P2.54-LS7.6-BL - Role Details: PTT input isolation - Manufacturer Part Number: 4N35 - LCSC Part Number: C3014310 - Part Type: Optocouplers - Phototransistor Output - Manufacturer Name: UMW(友台半导体) - Role: Isolation - Package: DIP-6_L7.3-W6.5-P2.54-LS7.6-BL - JLCPCB Part Class: Extended Part **Pins:** - AN [pin 1] - BA [pin 6] - CA [pin 2] - CO [pin 5] - EM [pin 4] - NC [pin 3] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/boothg599/6m-40m-linear-amplifier~wg](https://www.flux.ai/boothg599/6m-40m-linear-amplifier~wg).* --- *Generated from [https://www.flux.ai/boothg599/6m-40m-linear-amplifier~wg](https://www.flux.ai/boothg599/6m-40m-linear-amplifier~wg)*