EMF and RF reduction

[speakerman1]

Is there any way to use a composite material to block either of these? Carbon or Kevlar? It would be very light. Wonder about heat dissipation. Lead would work. To heavy. I'm trying to remember there was an adhesive that had metal in it. No I'm wrong. It was like Bondo with metal in it. Stuff hardened just like metal. I'm just trying to think of a low cost and light way to do it. Would you want to absorb them or block them. Your supose to lay the cloth at 45 degree angles. You could I guess put metal dust in your resin. Suck it down There wouldn't be one pore to go through. Any suggestions?

 

[rtp_burnsville]

Larry,

I have used a paint like material containing very tiny balls of silver. Chromerics (spelling) was the company that made the stuff, but that was 10 years ago. Used to spray the inside of enclosures to pass FCC emission tests.

Also have used carbon filled plastic in injection molding to help with ESD protection.

All of this is a bit of an art.

Robert

 

[Gepetto]

Chomerics is the spelling Larry. They make a whole line of RF shielding materials. We use them to keep RF from getting out of the box, you will be using them in reverse.

 

[orange]

My DTV converters, especially the livingroom's Dish Pal JR+ or whatever flake off well but my computer seems to occasionally screw the picture up (it's behaving today). The Dish box won't deal with alternate audio, meaning I can't listen to OPBMusic and KMHD Portland jazz radio and it has more mapping issues than my Digital Storm DTX-99x0, which is why the DS is in the bedroom where I watch music shows at night.

Believe me, if I had had the money at the time I'd have two DS boxes. I won't look for any others on Craigslist. My opinion of Dish Network is not very good anymore after I got treated like it was a 'freebie', why bother about finding a solution? My satellite will be FTA.

Anyway the darn things, especially the DS put out receiver type heat. Don't confine one or leave something on top. They seem most vulnerable at the back connections and there are some digital lower powered UHFs that are otherwise OK but break down regularly. The last time was when The CBS station moved from the 20s to RF channel 9 recently and after scanning/resetting to factory over six times they pulled all the TX at that site for repairs (maybe they're moving them to the other site where their first station went in five years ago in analog and leased to the NBC affiliate for their then-new news/special programming subchannel).

For a while CBS 2 messed up FOX 9 (next door at RF 10). Even though I feel *still* that my market has some of the best engineered signals in the western US I can't help but feel they are learning as much as I am. This is smelly lutefisk.

After two weeks of $$$$$$$ with the antenna and rescanning etc it would be no wonder I get mad and fed up with the 'not our station' attitude that permeates our local broadcasting culture now, 40 years after they were crosspollinating and buzzing around to build out the 3 networks and PBS by 1974 it's like they live in a damn bunker.

More than you expected from a thread about shielding but it's beyond related, it's inbred. I'm too old to do all this stuff AND freak about trying to watch TV, guessing whether it's my problem or theirs.

My 2 kopeks, as a friend on AK would say.

 

[speakerman1]

Well someone told me to try TI shield. I found it. It is better to work with than MU Metal. So I may try some. Michael Percy sells it.

 

[speakerman1]

I bought some lead. I wrapped the trans in the SP. You know the mind is a terrible thing to wasted. Oh I mean waste. LOL

 

[laatsch55]

Yep, that mind needs more solder fumes....yep.....