Did you try the regular crystal manufacturers? I believe I obtained my 455.8 crystal from International Crystal, but that was several years ago. The crystal is a worthwhile addition to the receiver. Jim > Hello to the List, > > I am still looking for the 455.8-Kc crystal that gives you the 800 cps offset when used with the F455Q-5 filter. > > Any help out of your crystal box? > > Thanks es 73, > > Larry, K4CL