BeoGram-4002-RIAA

leicht-io·BeoGram-4002-RIAA

BeoGram-4002-RIAA PCB layout, top view — open source board by leicht-io

About the BeoGram-4002-RIAA PCB

BeoGram-4002-RIAA is an open source PCB design by leicht-io, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 112 × 202 mm, with 57 components from 28 distinct parts.

Other key parts include the OPA2134 and LM317_TO-220. By type, the board carries 26 resistors, 18 capacitors, 4 diodes, 3 ICs, 3 connectors and 1 transistor.

It belongs with the audio designs in this gallery.

From the project

Open-source RIAA phono preamp for the Bang & Olufsen BeoGram 4002/4004 turntable (KiCad)

An open-source RIAA phono preamplifier board for the Bang & Olufsen BeoGram 4002 / 4004 turntable, designed in KiCad.

- Technical overview - Connectors - Getting the fabrication files - Building one - Known issues and roadmap - Repository layout - Contributing - Safety and disclaimer - License

A dual-stage active/passive RIAA equalizer per channel, based on the classic LM833 application topology but using the OPA2134 for lower distortion. Full details are in docs/design-notes.md.

BeoGram-4002-RIAA, from the project README — From the project README

Main components on the BeoGram-4002-RIAA

OPA2134 LM317_TO-220

BeoGram-4002-RIAA bill of materials (BOM)

57 components, 28 distinct parts.

Qty	Part	Footprint	Refs
2	OPA2134	D8	U5, U6
1	LM317_TO-220	TO-263-2	U7
1	Q_NPN_BCE	SOT-89-3_Handsoldering	Q1
1	From main PCB	PinSocket_2x09_P2.54mm_Horizontal	P8
1	From Wire	PinSocket_1x06_P2.54mm_Vertical	P9
1	From Keyboard	PinSocket_2x09_P2.54mm_Horizontal	P10
1	G6K-2	Relay_DPDT_Omron_G6K-2F-Y	K1
1	1M	Potentiometer_Bourns_3314G_Vertical	RV1
3	1N4004	D_SMA	D5, D7, D8
1	1N4002	D_SMA	D6
4	470uF	CP_Elec_10x10.5	C1, C2, C3, C31
4	100nF	C_1206_3216Metric_Pad1.33x1.80mm_HandSolder	C27, C28, C29, C32
1	10uF	C_1206_3216Metric_Pad1.33x1.80mm_HandSolder	C30
1	100uF/6.3V	C_1206_3216Metric_Pad1.33x1.80mm_HandSolder	C33
2	200uF	CP_Elec_6.3x7.7	C103, C203
6	10uF	CP_Elec_5x5.4	C106, C107, C108, C206, C207, C208
1	5k6	R_1206_3216Metric_Pad1.30x1.75mm_HandSolder	R19
1	300	R_1206_3216Metric_Pad1.30x1.75mm_HandSolder	R20
1	1k	R_1206_3216Metric_Pad1.30x1.75mm_HandSolder	R21
1	100k	R_1206_3216Metric_Pad1.30x1.75mm_HandSolder	R22

Show 8 more

Qty	Part	Footprint	Refs
8	47k	R_1206_3216Metric_Pad1.30x1.75mm_HandSolder	R102, R103, R111, R112, R202, R203, R211, R212
2	499	R_1206_3216Metric_Pad1.30x1.75mm_HandSolder	R104, R204
2	80.6k	R_1206_3216Metric_Pad1.30x1.75mm_HandSolder	R105, R205
2	8.45k	R_1206_3216Metric_Pad1.30x1.75mm_HandSolder	R106, R206
2	2.37k	R_1206_3216Metric_Pad1.30x1.75mm_HandSolder	R107, R207
2	54.9k	R_1206_3216Metric_Pad1.30x1.75mm_HandSolder	R108, R208
2	4.3k	R_1206_3216Metric_Pad1.30x1.75mm_HandSolder	R109, R209
2	2k	R_1206_3216Metric_Pad1.30x1.75mm_HandSolder	R110, R210

BeoGram-4002-RIAA design files

The KiCad project lives in the leicht-io/BeoGram-4002-RIAA repository on GitHub; these links point at the commit this page was built from.

LayoutRIAA.kicad_pcb
SchematicRIAA.kicad_sch

BeoGram-4002-RIAA: common questions

How big is the BeoGram-4002-RIAA PCB?

The BeoGram-4002-RIAA measures 112 × 202 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the BeoGram-4002-RIAA?

57 components, from 28 distinct parts. The full bill of materials is listed on this page.

Where can I download the BeoGram-4002-RIAA design files?

From the leicht-io/BeoGram-4002-RIAA repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the BeoGram-4002-RIAA design in my own project?

Yes, under the terms of its CERN-OHL-S-2.0 license, which leicht-io chose for the repository.

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