WTB: 3B4 plug in for RTTY


I am going to use the 561B rack mount scope I have restored in an RTTY setup. The time base I have does not offer an external horizontal input. A 3B4 or perhaps 3T4 does have it. Does anyone have one to spare? Thanks,

Bruce Gentry, KA2IVY

Join TekScopes@groups.io to automatically receive all group messages.