Curve tracer christmas calendar 13 – Funny Phillips Voltage Regulator tube This funny voltage regulator tube appeared here, so why not curve trace it? Probably a bit leaky after being in storage since it was produced. Share this: Click to share on X (Opens in new window) X Click to share on Facebook (Opens in new window) Facebook Like Loading... Author: Thomas S. Knutsen Electronics engineer with interests in RF and analog electronics. View all posts by Thomas S. Knutsen