Advice on Eico 666 tube tester

My Eico works pretty well but I'd like to get it calibrated. Any recommendations? (Preferably someone friendly who will talk on the phone.)

Also, am I right in assuming I should use the same settings for testing a 7308 as a 6922? From my reading the 7308 is just a more robust version of the 6922.

Thanks for your help.

There is much available on-line for these. Start with doing a search on Tone Lizard. There you can get a manual as well. Then fourwater dot com will give you a very comprehensive restoration and repair routine, including calibration information.

Good testers, but LOTS of mistakes on the roll chart - again, check Tone Lizard for information on this aspect of things.