# ECC Push-Pull — KiCad open-hardware example

Design: ECC Push-Pull, revision 0.1, dated 2015-03-21. Attribution: KiCad demo contributors; original design notices remain in the design files.

Source: https://gitlab.com/kicad/code/kicad/-/tree/10.0.6/demos/ecc83
Pinned source commit: caf7377e9cb6fa1535ec3596dcb8c99bf44a996e

The schematic, PCB and project settings are unmodified copies of the upstream files, distributed under Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0), as stated in upstream LICENSE.README:
https://gitlab.com/kicad/code/kicad/-/blob/10.0.6/LICENSE.README
License: https://creativecommons.org/licenses/by-sa/4.0/
Legal text: https://creativecommons.org/licenses/by-sa/4.0/legalcode

nomoreda's screen preview is an adaptation of this design under the same CC BY-SA 4.0 license. Browser edits create a personal project copy; exported modified copies remain subject to that design license. The application code is separate from this example's license. No endorsement by KiCad is implied.

This valve amplifier uses hazardous high voltages. It is provided to exercise editing and interoperability, not as a build recommendation. No electrical safety or manufacturing approval is implied. The upstream local symbol library, footprint library, library tables and valve 3D model are bundled. Standard KiCad 3D libraries are not bundled. Install the standard KiCad libraries for the remaining 3D models.