2 layers94 × 125 mm QMX Plus amp, the printed circuit board in 3D

QMX Plus amp

an amplifier that fits inside QMX+ radio

Size: 94 × 125 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 101
Nets: 119
Pads: 350
Tracks, vias: 0, 0
Routed: Not yet
KiCad: KiCad 8.0 (file 20240108)
Created: 5 Aug 2024
Updated: 11 Nov 2024

Overview

QMX Plus amp is an open-source printed circuit board by timborn, from the timborn/QMX-Plus-amp repository on GitHub. It is a 2-layer board of 94 × 125 mm with 101 parts on 119 nets.

It is built around the RD16HHF1, SJ1-3523N and EA2-5NU, with the BSS123 among its other parts. Its parts include 33 capacitors, 14 resistors, 14 switches, 14 inductors and 8 transistors. It belongs with the audio and music boards of this library.

Main components

README

README.md

QMX-amp

The QMX+ is a very nice radio kit from QPR Labs https://qrp-labs.com/

This amp is designed by Ron Taylor, WA7GIL. It should fit inside the empty space in the case.

doc/original-drawings shows the original design sketchs

Parts

101

Qty	Value	Footprint	References
12	EA2-5NU	ZZZMyLibrary:DIPS762W70P254L1420H540Q10N	K1, K2, K3, K4, K5, K6, K7, K8, K11, K12, K13, K14
12	L	ZZZMyLibrary:Toroid_T50_Vertical_L14.0mm_W5.6mm	L1, L2, L3, L4, L5, L6, L7, L8, L11, L12, L13, L14
7	47K	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R1, R2, R3, R4, R5, R13, R14
7	BSS123	Package_TO_SOT_SMD:SOT-23	Q1, Q2, Q3, Q4, Q5, Q7, Q8
6	1N4148	Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal	D1, D2, D3, D4, D11, D12
3	0.1 uF	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	C18, C19, C20
3	180 pF	ZZZMyLibrary:C_Disc_D11.0mm_W3.0mm_P5.00mm	C4, C16, C28
2	0.01	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	C22, C23
2	0.1	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	C21, C24
2	100 pF	ZZZMyLibrary:C_Disc_D11.0mm_W3.0mm_P5.00mm	C10, C31
2	120 pF	ZZZMyLibrary:C_Disc_D11.0mm_W3.0mm_P5.00mm	C26, C29
2	20K	Potentiometer_THT:Potentiometer_Piher_PT-10-V05_Vertical	RV1, RV2
2	270	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical	R8, R10
2	360 pF	ZZZMyLibrary:C_Disc_D11.0mm_W3.0mm_P5.00mm	C3, C15
2	4.7K	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R6, R7
2	470	Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R11, R12
2	660 pF	ZZZMyLibrary:C_Disc_D11.0mm_W3.0mm_P5.00mm	C2, C14
2	68 pF	ZZZMyLibrary:C_Disc_D11.0mm_W3.0mm_P5.00mm	C27, C33
2	HK19F-DCxxV-SHC	Relay_THT:Relay_DPDT_Finder_30.22	K9, K10
2	RD16HHF1	Package_TO_SOT_THT:TO-220F-3_Horizontal_TabDown	U3, U4
1	1 uF	ZZZMyLibrary:C_Disc_D11.0mm_W3.0mm_P5.00mm	C25
1	1200 pF	ZZZMyLibrary:C_Disc_D11.0mm_W3.0mm_P5.00mm	C1
1	1240 pF	ZZZMyLibrary:C_Disc_D11.0mm_W3.0mm_P5.00mm	C6
1	13 pF	ZZZMyLibrary:C_Disc_D11.0mm_W3.0mm_P5.00mm	C30
1	1N4148	Diode_THT:D_DO-34_SOD68_P7.62mm_Horizontal	D9
1	21	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical	R9
1	220 pF	ZZZMyLibrary:C_Disc_D11.0mm_W3.0mm_P5.00mm	C9
1	2200 pF	ZZZMyLibrary:C_Disc_D11.0mm_W3.0mm_P5.00mm	C5
1	330 pF	ZZZMyLibrary:C_Disc_D11.0mm_W3.0mm_P5.00mm	C8
1	36 pF	ZZZMyLibrary:C_Disc_D11.0mm_W3.0mm_P5.00mm	C12
1	47 pF	ZZZMyLibrary:C_Disc_D11.0mm_W3.0mm_P5.00mm	C11
1	650 pF	ZZZMyLibrary:C_Disc_D11.0mm_W3.0mm_P5.00mm	C7
1	82 pF	ZZZMyLibrary:C_Disc_D11.0mm_W3.0mm_P5.00mm	C32
1	820 pF	ZZZMyLibrary:C_Disc_D11.0mm_W3.0mm_P5.00mm	C13
1	? uF	ZZZMyLibrary:C_Disc_D11.0mm_W3.0mm_P5.00mm	C17
1	BN-43-202	ZZZMyLibrary:BN-43-202-FLAT	T1
1	BN-43-7051	ZZZMyLibrary:BN-43-7051-FLAT	L10
1	Barrel_Jack_Switch	Connector_BarrelJack:BarrelJack_Horizontal	J4
1	Conn_01x08_Pin	Connector_PinHeader_1.00mm:PinHeader_1x08_P1.00mm_Horizontal	J1
1	FT50-43	ZZZMyLibrary:Toroid_T50_Vertical_L14.0mm_W5.6mm_4pins	L9
1	LM7805_TO220	Package_TO_SOT_THT:TO-220-3_Vertical	U2
1	MPS-751	Package_TO_SOT_THT:TO-92	Q6
1	RF-IN	Connector_Coaxial:BNC_Amphenol_B6252HB-NPP3G-50_Horizontal	J2
1	RF-OUT	Connector_Coaxial:BNC_Amphenol_B6252HB-NPP3G-50_Horizontal	J3
1	SJ1-3523N	ZZZMyLibrary:SJ1-3523N_CUD	U1

Questions

How big is the QMX Plus amp PCB?

It measures 94 × 125 mm and has 2 copper layers, 1.6 mm thick.

What parts does the QMX Plus amp use?

101 parts, built around the RD16HHF1, SJ1-3523N, EA2-5NU and BSS123. 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 QMX Plus amp KiCad files?

From the timborn/QMX-Plus-amp repository on GitHub, at the commit this page was made from: the board is QMX-Plus-amp.kicad_pcb and its schematic LPF Chain.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the QMX Plus amp design in my own project?

Its repository states no licence, so its author keeps all rights: ask timborn before reusing the design.

Category and platform

Audio and music

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/timborn-qmx-plus-amp" title="QMX Plus amp in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/timborn-qmx-plus-amp.jpg" alt="QMX Plus amp" width="1200" height="900">

A picture that opens the board, for a README

[![QMX Plus amp](https://pcbkit.io/embed/boards/timborn-qmx-plus-amp.jpg?size=s)](https://pcbkit.io/boards/timborn-qmx-plus-amp)

Source

Repository: timborn/QMX-Plus-amp
Board file: QMX-Plus-amp.kicad_pcb
Commit: eadc865
Licence: Not stated

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