What is a good tube tester and where can I buy one

I am currently looking for a tube tester, but I have no idea which are the reliable and dependable ones, and where can I buy them?
thanks

umaasa10-03-2002 11:53am

peter_s Details Discussions Posts This discussion Message User 1,313 posts 02-21-2003 at 04:27am Copy Comment URL Report Comment Edit Delete What about the lower price models, such as the 533, 533a, 600, 600a? Is it true that the non "a" models can't test 6922's 6DJ8's, etc? Thanks.