Hickok 600 settings for the 6C45 tube?

I found this:  https://www.diy-audio-guide.com/support-files/6c45.pdf

Hi

i have some Hickok documentation and also manuals with lots of hand written notes from the past and could not find that tube or and substitute traced back to that type.   My tester was built in 1960 , nothing that new in my docs.  

Try looking at manuals for testers built in the late 60’s and 70’s and you might have better luck