Tube tester recommendation!


Is there an inexpensive (but accurate) tube tester that one can buy? Here on Agon sometimes? Through a merchant? Amazon? Ebay?

Tubes can be expensive and I want to get every bit I can from them but once they begin to go I'd like to have the means to validate that (sometimes I think my hearing may be the issue :-))

Thank you!  
rbschauman

Showing 1 response by sksos1