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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Thu Apr 21, 2011 3:58 pm Post subject: interesting Christy board for marquee |
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saw this on flea bay and while it's a useless S-video/Comp board I thought it was intersting that thay added a big shield (Faraday cage) to the top of it. Is that to isolate the board from the chassis or vice-versa?
Also, their use of Alum. elecrtrolytic SMD caps instead of Solid Tantalums is something I've been playing around with here too.
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Thu Apr 21, 2011 10:19 pm Post subject: |
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| Nashou66 wrote: | What i do Drags is I made a metal plate and covered it with Copper Roof flashing and put that in the spot where the Multi decoder goes.
If you have a MDM board then leave it there as the copper in the PCB acts as a pretty good shield for the VIM. The HDM is right above it remember. 
Athanasios |
wow, never even thought of that  I can do better though, sheetmetal shear at work will cut a dummy-board to fit right in there out of Alum. .06 thick
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