Found an old Leader freq counter (LDC-823S) in the trash at work, with a note attached, "not working after move to new lab". The display is dead, but everything else shows signs of life with my scope.
The blue florescent display, ITRON FG913, shows two pins labeled F1 & F2. They go back to the power transformer and appear to be the equivalent of a filament connection. Should I be able to measure some resistance across these, like a vacuum tube? It's reading open. Not so familiar with these florescent readouts.
I'm thinking it was dropped and something in the display is physically broken, hence no display. Found a new display, but this isn't worth the $45 they want for it.
this is a question begging a subjective answer .... to fix or not to fix
well I seem to have the same jones when it comes to hp test equipment .... the quality of construction is beautiful to my eye and so I want it to have another chance at usefulness ... so I buy it when I can and delite in it when working ....
a jones is a jones is a jones ..... at least the law dos'nt care about thisun .....ENJOY
n.b. offer them less than $45 .... they just might accept it