I picked up a Dow-Key DKC-TRM-1 tube-type T/R switch. All of them that I've
seen before use a 6EH5 tube. This one has a 6CB6 installed. I have no idea
if it works or not. My question: Does my unit have the wrong tube installed,
or did Dow-Key use more than one type of tube in this model?

73,
Dean K5DH