开云体育

Because 60Hz isn't the primary reason for the mumetal shield. The primary reason is the Earth's magnetic field deflecting the beam in annoying ways. -Chuck Harris 'cheater00 .' cheater00@...

Precisely why, when the cards are stacked against me, my ONLY option is to refuse to play the game!

And this applies above power line frequencies. I have personal experience with this on the 7834 oscilloscope which uses a switching power supply. This particular 7834 has a geometry issue and one of

It’s used to keep magnetic fields out of the path the electrons travel in the CRT. Copper foil will shield electric fields, and to some extent will shield AC or changing fields. Mu metal channels or

This is excellent packing advice, and this is exactly why stuff like new TVs are also packed this way: engineers have researched the issue and come up with this stuff, since a lot of big things like

Mu metal is a shield for magnetic fields. It has extremely high permeability, the ability to conduct magnetic fields the Greek letter Mu u is the symbol for permeability. See:

Ahh ok, now THAT makes sense and tells me a lot + gives me some keywords to follow up on. Thank you very much! <hp_agilent_equipment@...> wrote:

The skin depth for copper at 60 Hz is large enough that significant field energy can penetrate through material thin enough to be practical, resulting in interference. Mu metal (iron that has been

I disagree. I have bought Agilent ESG-DP, 8341B, 8753ES, 4395A, E4440A, Tek CSA8000, R+S misc, and various heavier advantest equipment in the past year or so. The key is to use the 3" semi-hard foam

Another reason, the CRT beam is most?susceptible to magnetic fields as seen in the television deflection yoke scanning the beam. A sufficient magnetic field close to the CRT will deflect or modulate

Hello-- ...And Mew Metal shielding will keep cats out of transmitters....<g>. 73-- Brad AA1IP

I know they're different Jack, I'm asking how. Cheers [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:

You're comparing apples and oranges. 60hz Magnetic fields are what MU-metal are best at filtering out. Copper screen is best for shielding RF electric fields as radiated from antennae. Jack KG6INX

I understand a changing magnetic field would induce a current in the copper foil, and so the magnetic field would effectively be "used up" by the copper foil, though. Why is copper shielding not

Hi, Mu metal is used because the shielding is from magnetic fields not electric fields. Copper is diamagnetic so not a good shield of magnetic fields that would deflect the electron beam.

The Mu-Metal exhibits ?a shield against 60hz transformer magnetic fields commonly known to induce beam distortion.

Hi guys, Why is Mu Metal used to shield CRTs in scopes, rather than just grounded copper foil? I never understood the precise reason for that. Thanks

Hi everyone, I am posting this here in hopes that someone out there can help me with a MAJOR mistake! I erased the EEPROM to my HP70900B Local Oscillator, this in turns kills using the Spectrum

In the past I've very successfully shipped test equipment. Unfortunately, to pack it right takes strong boxes and good packing materials and these aren't always available for free. The extra size and