Hi All, I need a pair of crystals, any size ok although smaller is preferred. 453 and 457 KHZ or 452.5 and 475.5 KHZ or 452 and 458 KHZ For a product detector circuit for rigs with 455 KHZ IF Thanks, 73, Keith ve3ts --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com