model 751
French tube tester

click on any section of above image to enlarge in a new window

peek inside

A most interesting tube tester, French made in the early - mid 1930's (I suspect). The roll chart features American & European tubes from the early days; (1920's) - to the mid 1930's. The left side of the roll chart shows US tube settings, the right side are the European types.

Reproduction meter scale available, inquire for quote.


the instrument is no longer available