Just got a Hickok 6000 tube tester that seems to be clean and in good condition.Have tube data but no schematic yet so have not tried it. Switches seem
a little stiff but work ok.Should these be lubed
or left alone? Would appreciate any comments about
this tester.
Bob

You might want to try some contact cleaner. You can get it at most Radio Shacks or at www.tubesandmore.com

:Just got a Hickok 6000 tube tester that seems to be clean and in good condition.Have tube data but no schematic yet so have not tried it. Switches seem
:a little stiff but work ok.Should these be lubed
:or left alone? Would appreciate any comments about
:this tester.
:Bob