KTechlab hasn't had any new release tarballs for a good while, however, development is still somewhat ongoing in the SVN trunk. The live version has quite a few new features such as JFETs/MOSFETs and animated wires. Here is an ebuild for the SVN version.
Created attachment 173646 [details] ktechlab-9999.ebuild
a few QA suggestions: fix copyright year :D cleanup cvs log from $Header remove SRC_URI (not needed for live ebuilds) remove keywords from KEYWORDS variable (never keyword live ebuilds, they are always unstable) use http://svn.sourceforge...... instead of https://${PN}.... (no validation will be then required) Also, give a try to slot it. KDE Herd plans to change kde-3 eclass to auto-slot all kde misc packages in order to reduce kde3/4 bugs, but since it is not ready yet....
Live ebuilds are only added when absolutely necessary and certain conditions are met. A much better alternative is contacting upstream and have them make a release instead. Denis.
sci-electronics/ktechlab removal, see bug #293089 for reference