Tube Testers: Threat or Menace?

[Tubejunke]

Originally Posted by miniman82

My Eico 625 does 6CA7's, and a lot of other funky tubes too. Pretty sure it came out in the late 50's, so your tester much be a lot older I'm guessing? Perhaps the manual of your unit says something similar?

I didn't even think about subs. If the 6CA7 is an older sub for an EL-34, then I could just use those settings for a test. I know that amp tubes like the EL-34 aren't new news by any stretch. However, the part # doesn't go back as far as a lot of, probably most of, the vintage scrolls provide data for. Out of the 4 or 5 testers that I have, I am sure that more than one will do the 6CA7.

Heck, although I do play guitar and have one tube amp, I don't expect to be worried about any EL-34s soon if ever. My Epiphone is circa late 50s. No octals; just miniatures.