After 48 years as a ham, there are still many big holes in my technical
understanding of things. One of the biggest is shielding -- elementary
questions like:
Does a shield box for RF need to be grounded? What about a shield against
magnetic fields?
Should high-impedance audio circuits always be installed in a metal box to
prevent hum pickup?
Does the material of a shield box make any difference as long as it is a
good conductor?
Should signal grounds in a computer cable be grounded to the shield box at
each end, or deliberately left to float?
I have looked for a coherent discussion of shielding against various types
of signal ingress, without success. There are passing references in the
Handbook under various other headings, but typically they seem to assume
knowledge I just don't have.
Can anyone suggest a good, entry-level discussion of the subject anywhere?
Thanks,
73, Pete N4ZR
73, Pete N4ZR
Sometimes a tower is just a tower
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