I have this HP 430C Microwave Power Meter I recently bought online.
The manual says copyright 1955, someone has been inside of it more recently (Before Me![(y)]( "Thumbs Up (y)")
)
Just by looking at the "glow" of the internals of a tube can you see that one has failed?
For instance two or three tubes do not "glow" like the rest, instead towards the top I see two bright red-hot spots.
I assume something is wrong.. But I don't know! The unit turns on, and kind-of gets stable...
I can link in a youtube video if...
Could you spot a bad vacuum tube if you saw one?
The manual says copyright 1955, someone has been inside of it more recently (Before Me
)Just by looking at the "glow" of the internals of a tube can you see that one has failed?
For instance two or three tubes do not "glow" like the rest, instead towards the top I see two bright red-hot spots.
I assume something is wrong.. But I don't know! The unit turns on, and kind-of gets stable...
I can link in a youtube video if...
Could you spot a bad vacuum tube if you saw one?