I have 2 1LN5 tubes that show sorted on 1 tube tester and not shorted on another. Is there a way to test them with an ohmmeter?

: I have 2 1LN5 tubes that show sorted on 1 tube tester and not shorted on another. Is there a way to test them with an ohmmeter?
:
Pins 8 and 5 are tied together on that tube; pins 8 and 1 are the filament. No other pins should show a short.
Johnnysan-

I wonder, though, if a short might show up when the tube is heated but not when it's unheated? Or vice versa? I can visualize that maybe various internal clearances and dimensions might change with temperature.

I do think there is some weirdness in the way some tube testers check for shorts. My Heath TC-2 always shows a short for a particular tube type (can't recall which type). And, I think I've had tubes that tested as shorted that worked fine.

Also depends on how the tube is connected in the tester. Some testers tie all of the grids together with the plate, and others connect the elements to separate power sources, etc.

If there is in fact an unwanted short in those tubes, and not the interconnection between pins 8 and 5, and you know what you are doing, there are ways to 'blow apart' shorts with high current. With my EICO 625 I do this by turning the current setting to 4, and then depressing the merit button a few quick times. If done incorrectly, you can damage the tube and/or equipment.

T.

:Also depends on how the tube is connected in the tester. Some testers tie all of the grids together with the plate, and others connect the elements to separate power sources, etc.
:
:If there is in fact an unwanted short in those tubes, and not the interconnection between pins 8 and 5, and you know what you are doing, there are ways to 'blow apart' shorts with high current. With my EICO 625 I do this by turning the current setting to 4, and then depressing the merit button a few quick times. If done incorrectly, you can damage the tube and/or equipment.
:
:T.
:Thanks a lot guys. Will check that info out

Agree with all that has been said

If both tubes are from the same radio, it seems it is unlikely that they are not shorted, unless there is some inherent weakness with the ilk that has been buried in history. Small signal tubes very rarely short out. They burn out (open filament,) or wear out (too low emissions to work,) or lose their vacuuum due to trama, Otherwwise they live on.

:: I have 2 1LN5 tubes that show sorted on 1 tube tester and not shorted on another. Is there a way to test them with an ohmmeter?
::
:
:
:Pins 8 and 5 are tied together on that tube; pins 8 and 1 are the filament. No other pins should show a short.
:Johnnysan-
:
:
:
:

:Agree with all that has been said
:
:If both tubes are from the same radio, it seems it is unlikely that they are not shorted, unless there is some inherent weakness with the ilk that has been buried in history. Small signal tubes very rarely short out. They burn out (open filament,) or wear out (too low emissions to work,) or lose their vacuuum due to trama, Otherwwise they live on.
:
::: I have 2 1LN5 tubes that show sorted on 1 tube tester and not shorted on another. Is there a way to test them with an ohmmeter?
:::
::
::
::Pins 8 and 5 are tied together on that tube; pins 8 and 1 are the filament. No other pins should show a short.
::Johnnysan-
::
::Heres an Updat on this post. Continuity only from pin 1 to5, 1to 8,5 to 8 as it should be. So goingto keep them.
::
::
: