Simple jFet Preamplifier – jBoZ – Progress June 2024
I made a few changes to the schematic and PCB. The biggest one was to create a jfet footprint that supports both DGS and DSG packages. The idea came from the PCBs designed by Passworks for the 2022 DIY front-end, published at diyaudio. Basically, it allows a plain 3-pin symbol for the schematics, and defines…
Technics SL1200 MK2 Regulator progress – Alpha version finalized
Version 0.3.2024.a is finalized and I have ordered some sample PCBs from elecrow. I have also assembled a first draft of a BOM, with parts that I either have or that I can easily order. I have also added some notes on the schematic. These can be shown on the HTML BOM file so that…
Simple jFet Preamplifier – jBoZ – New Project
Catching up with my numerous projects, it’s time that I revisited my version of what became popular in diyaudio and pass labs circles as the jBoZ preamp. There is nothing particularly critical about the circuit. It’s pretty much a simple jfet circuit, very close to what one can find in electronics tutorials. Below you can…
Universal Power Supply
Status: The boards are under evaluation A singly supply rectifier followed by a CRC/CLC filter. This is my workhorse PCB. It is used in almost all my projects. Features: Schematics: Indicative Bill of Materials: Under Review This is just an indicative list of parts that are known to fit and work with the PCB for…
Technics SL1200 MK2 – External PSU
One of the most impactful modifications that you can do on your SL1200. Currently under heavy reviewing General Idea The project started as part of an idea by Jim/6L6 from the diyaudio forum. It was inspired by the previous work of Wayne Colburn of Pass Labs. While simple, the idea had a profound impact on…
Technics SL1200 MK2 Modification Project
This page is an index of all the modifications I have made or designed for my SL1200 turntables Under Heavy Reviewing
Technics SL1200 MK2 – Regulator Modification
How to make the venerable SL1200 even better by replacing its discrete regulator with a more modern idea.
Technics SL1200 Regulator progress – last RC stage
Rechecking my old notes I did some changing to the PCB of the regulator
Technics SL 1200 – Adding a Filter to the External PSU
How to make a good turntable even better by moving the internal transformer into an external case, and adding an easy custom DIY regulator with a CRCRC filter