[Johnson] What is the key terminal voltage for Johnson Adventurer, Ranger, Viking II and Valiant ?

[Sherrill Watkins]

Gentlemen: I am trying to obtain a suitable device for keying various
transmitters and need to know the open key terminal voltage for the
following: 1. Adventurer, 2. Ranger, 3. Viking II, and 4. Valiant? If anyone
can supply this information I will appreciate it. (Don't' bother sending me
to my owners manual as I have already looked and could not find it.)Thank
you.- Sherrill W. k4own.