Hi Guys!
Yes Mr. Creosote, 12AX7, 6V6 and 6SN7's are easy to test. Also, sounds like you're working on a Tweed Champ 5F1? My son and I built one from a kit last year. Send me a PM, I can lend you some new tubes that are tested and known good, or sell them to you for a great price.
Mr...