File:SparkNet 101.1 Jack FM logo.png

Main SparkNet logo for Jack FM stations on 101.1 MHz, such as KRXX Kodiak, Alaska and WHPI Glasford, Illinois. Not the same as the style in File:Nycjacklogo.png used by WCBS-FM and other CBS Radio stations. Reduced to 3-item palette (a red, a blue, and a transparent) by User:Closeapple using The Gimp (to remove very nasty JPEG artifacts that carried through to reduced sizes); optimized with multiple runs of  (4-bit depth just happening to edge out other depths for this particular image's deflation; it can actually be stored at 2-bit)