Printed Circuit Boards for RJM Audio Projects
Download layout and schematic files.
Information : Price List : The Boards : Help and Instructions
Information
The original, stereo version of the VSPS is available as a kit, with all the parts for the circuit board. The chassis, power supply, connectors and mounting hardware are not included. The VSPS Kit is a limited edition project, there will be only 100 sold and all kits will be identical. The boards are dual-layer, with extra-heavy 70µm copper traces and black solder masks. The parts have been specially selected for high sound quality and accurate RIAA response. The kit ships with a printed instruction sheet.
I also sell circuit boards for the Phonoclone 3 and VSPS 300 projects. The Phonoclone 3 is a Phonoclone moving magnet coil phono stage with the Xreg voltage stabilizer circuit. The VSPS 300 is the same circuit as the regular VSPS but configured to the same level as the Phonoclone 3, with dual-mono boards and the Xreg stabilizer circuit.
Prices listed below are in us dollars and include shipping worldwide. Payment is by Paypal. Please send an email to rjm003.geo at yahoo.com with your requests and I will send you a Paypal invoice for the total.
The parts lists and worksheets for the projects are in a single spreadsheet (Office 2007 .xlsx file format). This is a must-have if you any doubts about sourcing the parts for the boards, as it features a pre-formatted BOM you can import directly into your shopping cart at Mouser. It also has worksheets for calculating the circuit gain and regulator output voltage. You can download the latest version here.
Price List
- VSPS Kit : $35 for a kit that includes the stereo circuit board, all the components for it, and instructions. You will need to provide the chassis, connectors, mounting hardware, and the power supply. Photo (parts), Photo (assembled)
- 1 set VSPS 300 : $40 for a set of two boards. (rev. 300i) Photo
- 1 set Phonoclone 3 : $40 for a set of two boards. (rev. 35b) Photo
The Phonoclone 3 and VSPS 300 are not normally available as a kit, but I keep some of the less common parts in stock and you can order them with the boards to save time.
- IC1-4 (Phonoclone 3) or IC 1,3,4 (VSPS 300): +$32 for a set of 8 OPA27 opamps and sockets for the Phoncolone 3, +$24 for a set of 6 OPA27 opamps and sockets for the VSPS 300.
- Q1 and Q2: +$4 for a set of 2 BD135 and 2 BD136 transistors.
- C1 and C2 polypropylene: +$5 for a set of 8 Wima FKP 1 nF to fit C1 and C2 of any of the VSPS boards below.
- C1 and C2 mica: +$12 for a set of 8 Cornell-Dubilier 5% 1000pF mica capacitors to fit C1 and C2 of any of the boards.
- C3 : +$5 for a set of 2 Arcotronics 2 µF MKP to fit C3 of any of the boards.
- Electrolytics : +$18 for a set of 24 100 µF and 4 1000 µF Nichicon KW 25V audio electrolytic capacitors. This is sufficient to populate a set of two Phonoclone 3 or VSPS 300 boards.
Circuit Boards
The printed circuit boards are for the Phonoclone and VSPS phono stage projects. The VSPS is for moving magnet or high out moving coil cartridges, while the Phonoclone is for low output moving coil cartridges only. The boards features here are differentiated by the size, layout, and the voltage regulation circuitry used. In addition to the circuit boards you will need to supply the chassis hardware and power supply. More details are available in the construction guide. While you are welcome to get the boards made yourself, I currently have a selection of boards, parts, and kits for sale.
You will need to download and install the free Eagle Layout Editor software to view the schematic and board layouts. With Eagle you can make any changes and then send out the layout files for fabrication. The most convenient way to get boards made is to send the .brd file as-is to Olimex. You can do whatever you like with these files except for two things: don't pass them off as your own work, and don't use them for commercial gain.
VSPS
The latest 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.
For home-etching, or to minimize costs, there is also a single-layer version. The files are here.
VSPS 300
The VSPS 300 is a dual-layer 10 cm x 8 cm board. This is the "high-end" version of the VSPS. It is a single channel board (two complete boards required for stereo) and features the Xreg voltage stabilizer circuit instead of 3-pin voltage regulators. It requires three single op amps of your choice. It is the same size as the Phonoclone 3 boards, below, and has the same mounting holes, to allow upgrading or swapping boards.
Phonoclone 3
The Phonoclone 3 is dual-layer 10 cm x 8 cm board and a drop in replacement for the earlier BE board. It is a single channel board, two complete boards are required for stereo. The Xreg voltage stabilizer circuit is used as the voltage regulator.
Help and Instructions
- VSPS and Phonoclone project pages.
- The consolidated construction guide for all boards listed above, with details of the power supply and connections.
- Problems? Questions? Check out the VSPS and Phonoclone Help Desk at diyaudio.com. There is also a VSPS and Phonoclone Group Buys thread.
rjm003.geo at yahoo.com
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