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Date
Re: Recommendations for a synthesized 20GHz+ RF gen
[hp_agilent_equipment] <hp_agilent_equipment@...> wrote: Interesting - I don't foresee calibrating more than the one, but this is good to know - thanks.
By Sigur?ur ?sgeirsson · #73749 ·
Re: Recommendations for a synthesized 20GHz+ RF gen
Hey Vladan, the 8341 looks quite interesting, but boy it looks like a beast. Has the look of a mountain fortress :). I'll be sure to keep an eye out for one of those. Siggi
By Sigur?ur ?sgeirsson · #73748 ·
Re: [TekScopes] Re: Why is Mu Metal used?
I don't know about that being the "primary" but ya that too!
By Jack Mcmullen <forjack842@...> · #73747 ·
Re: Recommendations for a synthesized 20GHz+ RF gen
Hey Ancel, that's a very interesting device. See <http://www.rf-consultant.com/>. Looks like a combo RF synthesizer from 35MHz to 4.4GHz and power meter. Doesn't quite go where I'd need it to, but
By Sigur?ur ?sgeirsson · #73746 ·
Re: Recommendations for a synthesized 20GHz+ RF gen
Hey Bob, thanks for the tips - I'll read up on those for sure. It's sad to see otherwise perfectly good instruments going off due to the calibration software. The Tek TDS scopes have similar problems,
By Sigur?ur ?sgeirsson · #73745 ·
Re: eBay buyer protections are poor
Daniel I think you have missed the point of my comment. Why do some items cost 3 times as much to ship as the other same item?? And you are wrong - ten years ago USPS were quite reasonable. It seems
By Peter VK2AN · #73744 ·
Re: [TekScopes] Re: Why is Mu Metal used?
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@...
By Chuck Harris · #73743 ·
Re: eBay buyer protections are poor
Precisely why, when the cards are stacked against me, my ONLY option is to refuse to play the game!
By wb6dgn_tom@... · #73742 ·
Re: [TekScopes] Re: Why is Mu Metal used?
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
By David Hess · #73741 ·
Re: Why is Mu Metal used?
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
By David Byrne · #73740 ·
Re: Why is Mu Metal used?
By Brad Thompson · #73739 ·
Re: eBay buyer protections are poor
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
By Daniel Wolstenholme · #73738 ·
Re: Why is Mu Metal used?
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:
By Richard Knoppow · #73737 ·
Re: [TekScopes] Re: Why is Mu Metal used?
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:
By cheater cheater · #73736 ·
Re: [TekScopes] Re: Why is Mu Metal used?
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
By Jeff Kruth · #73735 ·
Re: eBay buyer protections are poor
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
By twrch@... · #73734 ·
Re: [TekScopes] Re: Why is Mu Metal used?
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
By Jack Mcmullen <forjack842@...> · #73733 ·
Re: [TekScopes] Re: Why is Mu Metal used?
Hello-- ...And Mew Metal shielding will keep cats out of transmitters....<g>. 73-- Brad AA1IP
By Brad Thompson · #73732 ·
Re: [TekScopes] Re: Why is Mu Metal used?
I know they're different Jack, I'm asking how. Cheers [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:
By cheater cheater · #73731 ·
Re: [TekScopes] Re: Why is Mu Metal used?
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
By Jack Mcmullen <forjack842@...> · #73730 ·