Log in
Register
Menu
Log in
Register
Home
What's new
Latest activity
Authors
Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Current visitors
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Terrestrial Broadcasting
Terrestrial Television, Digital and Analogue
Switch Mode Power Supply Woes - New Aerial/Mast head amplifier.
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="jeallen01" data-source="post: 1057854" data-attributes="member: 176704"><p>At around 200kHz, the beads would have to VERY big to have any effect (think PSU chokes), and, of course, the ferrites in them differ in terms of frequency response and most beads are intended for much higher frequencies.</p><p>Also (and I'm now getting a bit rusty at this, not having been involved in EMI suppression for over 3 yrs, <em>so it could be the other way round</em>!) if the coupling mode is Common, rather than Differential, Mode then they won't have much effect as the coupling path would also include the return path via a capactive external "virtual ground" link through the plastic case to whatever else is close to the unit.</p></blockquote><p></p>
[QUOTE="jeallen01, post: 1057854, member: 176704"] At around 200kHz, the beads would have to VERY big to have any effect (think PSU chokes), and, of course, the ferrites in them differ in terms of frequency response and most beads are intended for much higher frequencies. Also (and I'm now getting a bit rusty at this, not having been involved in EMI suppression for over 3 yrs, [I]so it could be the other way round[/I]!) if the coupling mode is Common, rather than Differential, Mode then they won't have much effect as the coupling path would also include the return path via a capactive external "virtual ground" link through the plastic case to whatever else is close to the unit. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Terrestrial Broadcasting
Terrestrial Television, Digital and Analogue
Switch Mode Power Supply Woes - New Aerial/Mast head amplifier.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top