RCA WT-100a Tube tester

[Tim]

I acquired one and went through it about a year ago. Unless it has been recently overhauled, you'll find that a lot of the 1% resistors are no longer 1% so it will need a complete going through and calibration. There were several different versions of this unit so make sure the manual and schematic matches your serial number.

It is set up by using data from a tube manual so no "setup charts" are needed but they did publish one with some common tubes in it. Having only one meter for all functions is a little strange but it does the job and is a great unit to really analyze tubes. Enjoy it.

[SwizzyMan]

Originally Posted by Tim

I acquired one and went through it about a year ago. Unless it has been recently overhauled, you'll find that a lot of the 1% resistors are no longer 1% so it will need a complete going through and calibration. There were several different versions of this unit so make sure the manual and schematic matches your serial number.

It is set up by using data from a tube manual so no "setup charts" are needed but they did publish one with some common tubes in it. Having only one meter for all functions is a little strange but it does the job and is a great unit to really analyze tubes. Enjoy it.

Thanks for the info Tim! But your information has revealed a possible problem. My tester is the first version, but I bought resistors using the parts list from the second version! Hopefully version 1 and 2 do not differ too much in part choices. Do you know if your tester was the first, second, or third version Tim?