Greeting's All, Thank You for reading this message. A coworker has ask me if I could post a request for him. He has a Kenwood SM220 Monitor Scope and the CRT is starting to go bad. The CRT is marked 75ARB31, the question is is there a good replacment to use and what number is it. Any information will be greatly appreciated. Please reply to me off the refelector. Thank You. 73's de: Jeff N2LXM