I have a Precision tube tester model 654 circa 1950.
It has socket sizes to accomidate older tubes such as 80's 42's 6f6 ect but the manual and roll chart has no test settings. They must have been considered obsolete then.
Does anyone have a chart for the above? I will pay mailing and coping costs. thank you

:I have a Precision tube tester model 654 circa 1950.
:It has socket sizes to accomidate older tubes such as 80's 42's 6f6 ect but the manual and roll chart has no test settings. They must have been considered obsolete then.
:Does anyone have a chart for the above? I will pay mailing and coping costs. thank you

This web page has the information you are seeking, http://users.iglide.net/hworth/radio/precision.html

Ross