[Ron Ramirez]

Personally, I think the tube tester which offers the best bang for the buck is the Heathkit TT-1, with its optional TT-1-A adapter. It is a dynamic mutual conductance tester, and is sometimes overlooked by those who want the Hickok testers.

I picked mine up at an auction of an old radio-TV repair shop in western Kentucky back in the 1980s. In more recent years, I fully recapped it, found the calibration instructions online, and calibrated it.

I consider it to be the best two dollars I ever spent.