Memory Solutions for Synthesizers

About Sector101...

Hi! You've landed on the "About.." page of Sector101!

What is Sector101?
Sector101 is a spare-time hobby project based in the United Kingdom.

The items on this site are designed, assembled and tested at home. For this I use an ESD complient PCB workstation, soldering tools, magnifiers, test equipment, and synthesizers to test the finished items.

These projects have been inspired by members of the forums at
This forum is well worth a visit as there is a collective goldmine of information about current and past Yamaha synth products. There is a huge following of the older models like the DX Series, SY & TG, and the EX Series. The forum list can be viewed here.

What is your day job?
My regular job is in the electronics industry where I have worked for over 27 years. In that time I've gained knowledge of the automated SMD (Surface Mount Device) assembly line process and PTH (Plated Thru-Hole) assembly process.

In recent years I have been involved with Test & Test Development. In layman's terms this means designing a test for a product, testing the product, and debug the product if it fails the test. The products I deal with are many and varied: High-end audio equipment, oil refinery monitoring equipment, web-based security systems, fiber-optic optical switching controllers.

A useful skill I've picked up along the way is PCB rework / repair & modification. This is where components on the PCB are to be carefully removed and replaced, repairing broken tracks and lands, or circuit modifications where tracks are intentionally cut and mod-wires routed between components. Any of these jobs can involve replacing simple thru-hole components, or the more taxing high-density surface mount FPGA and DSP devices with 100's of fine legs, or BGA devices with 200+ Ball Pads.

How did the Sector101 projects start?
It all started in 2006 with an idea I had about making some type of memory circuit that would work in place of the obsolete Yamaha SYEMB06 memory board for my SY85.

I had no schematic for the SYEMB06 so after a lot of probing on the SY's connectors and internal components I finally got a rough schematic worked out. Armed with this info the first prototype veroboard-mounted circuit was built and working.

Around the same time there was a discussion on the YamahaForums site about re-creating the SYEMB06 module as a proper PCB assembly. As time went on I got more info about the Yamaha SYEMB06 assembly from the forum members. After doing some PCB design work a small batch of SYEMB06 clones were made.

How can I contact you?
If you want to contact me about anything please use the email address below. I will reply to your as soon as I can.

Email Us!