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What are small gold colored "caps" that came in bag with perfect path products?

I recently upgraded my Pre/amp/CD player and cables so I'm just now getting around to evaluating some perfect path products I bought.  In the bag with alpha e cards and thing you plug into outlets are several small gold colored objects looks like a cap to something, but it is not obvious what.  Anyone know what these are ?

Thanks for your time.
berner99
turnbowm
353 posts
 

millercarbon4,299 posts05-12-2020 7:48am"Because for like 20 years now they all have lots of extra plugs for surrounds and crap...."

That's true for receivers but NOT true for CD players.
imhififan's avatar
imhififan
2,210 posts
 
Great "explanation", as always...
geoffkait's avatar
geoffkait
23,365 posts
 
Just cover the open RCA jacks with copper foil. Also, is anyone suggesting something other than RFI/EMI rejection is going on here? For example, if the caps are used to cover unused RCA jacks on unplugged components.
millercarbon's avatar
millercarbon
12,531 posts
 
What about holons and morphic fields? How do you eliminate information fields? I mean, besides you being in the room.
geoffkait's avatar
geoffkait
23,365 posts
 
RFI. Let’s look at the wavelength of 1 Gigahertz wave for a second. It’s about 0.2 meter. So we can rule out all RF 1 GHz and below fitting into the opening of an RCA jack, let say it’s 3 mm. The hole diameter is too small. Pop quiz: at what frequency and above will RF fit into the opening?
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