View Single Post
Old 5th Jan 2023, 12:06 pm   #406
regenfreak
Heptode
 
Join Date: Nov 2018
Location: London SW16, UK.
Posts: 655
Default Re: 6-gang FM stereo tuner heads

Quote:
Originally Posted by Radio Wrangler View Post
Faraday screens leak like a seive. It's comparable to prefixing every mention of the word 'Tyre" with the word "flat". But Faraday screen/cage/shield seems to have entered folklore. Lexicographers have their dictionaries change to follow newer usage, but this is science and we are talking specific and defined terms here where we can't let meanings change without trashing knowledge.

Not being grumpy, just trying to defend something we need for accuracy.

David
The levels of H- and E- fields penetration vary significantly with frequencies, see attachment. Above 100KHz, the W- and H- field converges into plane waves over a wide range of frequencies...The rule of thumb is that the grid spacing is about 1/10th of the wavelength.
Attached Thumbnails
Click image for larger version

Name:	E -H field attenuation Faraday cage.jpg
Views:	48
Size:	97.6 KB
ID:	270937  
regenfreak is offline