Best Tube Tester for 6SN7 & 6AS7

You might try posting your question at the OTL Asylum, as both of these tube types are used in OTL amps so there's a good chance some of the people there will have experience with suitable tube testers.

http://www.audioasylum.com/forums/otl/bbs.html

Duke

I recently also made a decission on which tube tester to buy after reading and looking at multiable testers I decieded on a B&K 747B the reasons I choose this tester
1 easy to calibrate
2 lightweight
3 solid state no calibration tubes to buy
4 all different tube testers give readings in different values so you are looking not to match these values but to qualify the T.M.C. and tube life also look for shorts and grid emissions
5 but the real test is how do they sound I have tubes that do not test as well as others but outperform them in listening..

VacuTrace does this in real time:

http://www.hagtech.com/images/6sn7ab.jpg

It's the easiest way bar far to match sections within the tube. Also measures transconductance at any bias point.

jh