Here’s a picture of both the synth and the ampeg pedal together. It has by now got new electrolytic capacitors and a calibration. Worth knowing is that synthcubes “full kit” did not include the powersupply.Ī gutshot of the Ampeg pedal. The offboard wiring is a challenge on this thing. Synthcube carries a full kit for the build.Here’s the circuitboard, started to get populated. So what’s needed from me is to build the syntheziser. It’s got three controls, Pitch, glide and 5 th. The interface between the guitar and the synth is an Ampeg Patch2000 pedal.

It is the first guitar/synthesizer hybrid made by Hagström in collaboration with Ampeg. The guitar is Hagström Patch2000 from the late 1970:s. I just need to find the time for everything.A both intresting and a challenging project. The Microcon will get a new chassie and a calibration. So what’s left for now is to check the Pitch pedal on the Ampeg, it does not always work, there’s some problem with the 7 pin DIN cable from time to time. This videoclip also appeared in my earlier post Mystery circuit…. Here’s a short video of the tryout, my son Markus is playing the guitar wich is connected both to the synth and as a normal guitar to an amp. Here’s a pic of the guitars circuitboard U7 is located on the low left So the 74LS151 got replaced with a new one and suddenly things started to interact as it supposed to. I found nothing wrong with the guitars harware and measuring indicated that U7 (string monitor) was defect. Second thing was that the guitars electroninc always had the high E string set as active, therefore the Ampeg pedals Gate got blocked. After sorting that out the synth now seems to work properly. There’s eleven pots and a few switches and I had got some wires mixed. Once I finally got things hooked up together and could try it out it was clear that it is not fully functional.įirst thing I did was check was the offboard wiring on the microcon.

A both intresting and a challenging project.

Ampeg patch 2000 pedal service manual