# Yamaha DX7II Cartridge DIY?

**URL:** <https://forum.midibox.org/t/yamaha-dx7ii-cartridge-diy/19592>\
**Category:** Miscellaneous\
**Tags:** dx7ii, dx7, dx7s, diy, cartridge, yamaha\
**Created:** [May 25, 2016, 10:23am UTC](https://forum.midibox.org/t/yamaha-dx7ii-cartridge-diy/19592 "2016-05-25T10:23:46Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![clem](https://forum.midibox.org/user_avatar/forum.midibox.org/clem/32/139_2.png) [@clem](https://forum.midibox.org/u/clem)\
**Post date:** [May 25, 2016, 10:23am UTC](https://forum.midibox.org/t/yamaha-dx7ii-cartridge-diy/19592/1 "2016-05-25T10:23:46Z")

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Hi there,

I know this a is little bit OT and may be not very contemporary:

I have bought an old DX7S and thought about building a RAM-Cartridge by myself. Maybe someone here has some experience with this or knows where to find completed eagle files or a pcb to do this.

Best regards,

clem!

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**Author:** ![ilmenator](https://forum.midibox.org/user_avatar/forum.midibox.org/ilmenator/32/10_2.png) [@ilmenator](https://forum.midibox.org/u/ilmenator)\
**Post date:** [May 25, 2016, 11:44am UTC](https://forum.midibox.org/t/yamaha-dx7ii-cartridge-diy/19592/2 "2016-05-25T11:44:36Z")

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Do you have the schematics for these cartridges? If so, the layout should not be a major problem.

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**Author:** ![clem](https://forum.midibox.org/user_avatar/forum.midibox.org/clem/32/139_2.png) [@clem](https://forum.midibox.org/u/clem)\
**Post date:** [May 28, 2016, 7:31pm UTC](https://forum.midibox.org/t/yamaha-dx7ii-cartridge-diy/19592/3 "2016-05-28T19:31:40Z")

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Thx for the reply ilmenator,

I didn’t found any schematic for the Yamaha RAM4 or RAM5 on the web but I have a service-manuals for DX7II&nbsp; and you can find pics of the PCBs of the RAM-Cartridges - so you are right. But I never worked with eagle and the spacing of the pins of the cartridge port is a bit uncommon, so it would be helpful not to start from scratch. Perhaps etching a&nbsp; breadboard-catrtridge will do it. But I don’t know how to create a matching connector in eagle.

BTW Kölle am Rin is my old Heimat 😉 but that was 25 years ago.

Best,

clem!