doctorcilantro Posted August 26, 2008 Share Posted August 26, 2008 My tester has "50" as good with a max of "100". I'm testing some older 12AX7s and the test at 55/57 52/54 60/59 as a result of the two tests for 12 Real close to being barely "good" , but some brand new 6922 EH test at 70... How do I interpret these results? I'm selling all my extra tubes. Do I simply need a better tester? Should the new EH tubes be testing higher; does it sound like it's not properly calibrated? thanks DC Quote Link to comment Share on other sites More sharing options...
thebes Posted August 26, 2008 Share Posted August 26, 2008 You can pretty much gurantee that if never restored the caps etc. on your tester are dried out or drifted, the meter may be our of spec and if the Eico uses tubes, they could be old and worn out also. If your new tubes test at 70 I would use that as a baseline, which means the older 12AX7's are about 3/4's good. Don't forget small tubes last a long time, so well not new, they could have a long life ahead of them. Always keep some of the older spares around. They usually were made better and in applications like preamps will probably sound better. Quote Link to comment Share on other sites More sharing options...
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