I have acquired some radio equipment from an estate that was functioning 5 years ago. I have a HRO-50T1 receiver and a Viking Valient model 240-104 and a Vibroplex key w/ black box and lock. Where can I get some info on the Viking transmitter and the Vibroplex key?? Info such as specs and values etc. Thanks in advance for your interest in ham radio. Ralph Howes W8BVH