Printed Circuit Boards for RJM Audio Projects

Download layout and schematic files. Order boards and parts.


Phono Stages : Line and Headphone : Voltage Regulation


This is the place for ordering kits, boards, and parts for various projects featured on my web site. Please send me an email (Richard Murdey, rjm003.geo@yahoo.com) listing what you want, and I will send you a Paypal invoice for the total. Kits include the boards, instructions, and all the parts to complete the boards. Generally, you need to supply a transformer and diodes, as well as the chassis, connectors, wiring, volume control, etc. Boards just ship as bare boards. I only accept Paypal payments. Prices are in US dollars and listed below. Shipping is free.

The parts lists and worksheets for each project are available as a spreadsheet file (Excel .xlsx) which you can download below. They normally have a pre-formatted BOM (Bill Of Materials a.k.a. a parts list) you can import directly into your shopping cart at Mouser. The spreadsheet files also have worksheets and other useful information.

You will need to download and install the free Eagle Layout Editor software to view the .brd and .sch files. You can use the .brd files to make your own boards if you want. Just two rules: don't pass them off as your own work, and don't use them for commercial gain.

I've written a construction guide for the phono stage projects, with details of the power supply and connections.

Problems? Questions? Email (address above) or check out the VSPS and Phonoclone Help Desk or search the related forums at diyaudio.com. As well as being a valuable general resource, there are many threads there concerning the projects featured below. I also have a blog diyaudio, and maintain a Google+ page.


Phono Stages

Stereo VSPS


The Stereo VSPS

VSPS Standard

The original stereo VSPS is a dual-layer 5 cm x 8 cm board, and takes a dual op-amp of your choice. This is a dual-channel layout, only one board is needed for stereo. LM7x12 regulation on board. Board only $10 / Kit $40

Download Schematic (BOM) / RJM Audio VSPS Project Page


VSPS 200 Dual-Mono MM Phono Stage with Z-Reg

VSPS 300

The VSPS 300 is a dual-layer 10 cm x 8 cm board. It is a single channel board (two complete boards required for stereo) and features the Z-Reg voltage regulator circuit included on the boards. It requires one single op amp of your choice. Boards only (set of 2) $25 / Kit $100.

Download Schematic (BOM) / RJM Audio VSPS Project Page


VSPS 300 Dual-Mono MM Phono Stage with X-Reg

VSPS 300

The VSPS 300 is a dual-layer 10 cm x 8 cm board. It is a single channel board (two complete boards required for stereo) and features the X-reg voltage stabilizer circuit included on the boards. It requires three single op amps of your choice. Boards only (set of 2) $25 / Kit $150.

Download Schematic (BOM) / RJM Audio VSPS Project Page


Phonoclone 3 Dual-Mono MC Phono Stage with X-Reg

Phonoclone 3

The Phonoclone 3 is dual-layer 10 cm x 8 cm board. It is a single channel board, two complete boards are required for stereo. The X-reg voltage stabilizer circuit is built in to the boards, no additional regulation or filtering required. Boards only (set of 2) $25 / Kit $150.

Download Schematic (BOM) / RJM Audio Phonoclone Project Page


CrystalFET Dual-Mono MM MC Jfet Passive Phono Stage with MOSFET Shunt-Series Regulator

CrystalFET

The CrystalFET is a dual-layer 10 cm x 8 cm board. It is a single channel board (two complete boards required for stereo) and features the a MOSFET shunt-series voltage regulator. Boards only (set of 2) $25 / Kit $150.

Download Schematic (BOM) / RJM Audio CrystalFET Project Page

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Line and Headphone

Sapphire Rev. 3.0f


Sapphire 3 Headphone Amplifier

Sapphire

The Sapphire 3 boards are dual-layer and measure 10 cm x 8 cm. Dual mono layout, two complete boards are required for stereo. Z-Reg voltage regulation circuit is built in. Requires one single op amp per channel, also accepts 2520 modules - FET input types recommended. Boards only (set of 2) $25 / Kit $150.

Download Schematic (BOM) / RJM Audio Sapphire 3 Project Page


Sapphire 4 Headphone Amplifier

Sapphire

The Sapphire 4 boards feature the fully descrete Unity H amplifier circuit with Z-Reg voltage regulation circuit built-in. Dual mono layout, two complete boards are required for stereo. Boards only (set of 2) $25 / Kit $150. [prototype phase]

Download Schematic (BOM) / RJM Audio Sapphire 4 Project Page

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Voltage Regulation

Special offer: any three of the boards below (1 ea. S, X and Z-Reg, mix and match) for $15!

S-Reg Voltage Regulator


Z-Reg Voltage Regulator

RJM Audio Z-Reg

The Z-Reg voltage regulator is a double-sided board and measures 8x5 cm. This is the same power circuit used in the Sapphire and oroginal B-board projects, now offered as a standalone board. Board only $10 / Kit ---.

Download Schematic (BOM) / RJM Audio Z-reg Project Page


S-Reg Voltage Regulator

RJM Audio S-Reg

The S-Reg voltage regulator is a double-sided board and measures 8x5 cm. Low noise shunt-series regulator for low current applications. Board only $10 / Kit ---.

Download Schematic (BOM) / RJM Audio S-reg Project Page


X-Reg Voltage Stabilizer

RJM Audio X-Reg

The X-reg voltage stabilizer board is double-sided board and measures 5x8 cm. It requires a dual op amp such as the NE5532. The board can be used for testing, or retrofitted to upgrade existing equipment. Board only $10 / Kit ---.

Download Schematic (BOM) / RJM Audio X-reg Project Page

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rjm003.geo at yahoo.com