Kilroy schematic, "part of a band pass filter" according to the narration of <i><a href="https://en.wikipedia.org/wiki/V." class="extiw" title="w:V.">V.</a></i> by <a href="https://en.wikipedia.org/wiki/Thomas_Pynchon" class="extiw" title="w:Thomas Pynchon">Thomas Pynchon</a> [the configuration is actually "band-stop"]. Traced in Inkscape.
Original version: <a href="https://en.wikipedia.org/wiki/User:Eli_the_Bearded" class="extiw" title="en:User:Eli the Bearded">Eli the Bearded</a>, SVG version: <a href="//commons.wikimedia.org/wiki/User:WhiteTimberwolf" title="User:WhiteTimberwolf">WhiteTimberwolf</a>
2008-06-27
<span class="int-own-work" lang="en">Own work</span>