WEBVTT

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did you know that when your phone says 5G up there it's probably lying when I

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type star pound star pound 4636 pound star pound star LTE I paid for 5G darn

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it what's going on here as it turns out

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corporations is a liar sometimes and this kind of trickery is one of the

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reasons that we decided to spend nearly

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$45,000 on an industry standard radio

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frequency shielded room it will allow us to identify and debunk all kinds of

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Industry connivance like this as well as test products like cell phones routers

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even microwaves for things like signal range battery drain interference

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Regulatory Compliance and so much more

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there's just one small problem they shipped us the wrong one and they

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stopped replying to our emails so now all we have is this foam a big pile of

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wood some other assorted paraphernalia

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and a great big project to turn this

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into something usable but don't worry we got a plan for that that I'm going to

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share with you along with this segue to our sponsor team group Black Friday and

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when it comes to wireless technology it's really hard to know what's going on

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and it's not like you can see it which means that before we canest anything

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we're going to need some specialized equipment for one thing we're going to need a 4G 5G lab kit which is

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essentially a mobile network in a box that will allow us to spin up our own

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access points here and then measure the performance at various frequencies

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across the Spectrum with all kinds of devices be they iPhones or Samsung

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Galaxies naturally we'll want to do the same thing for Home wireless equipment

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be it Wi-Fi or Bluetooth and in order to

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ensure that our measurements are accurate we will need an EMC chamber so let's talk about

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the kind we were supposed to get for those of you in the oh 45 Grand for a

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fully assembled 16x 12T EMF chamber is

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actually not a ton of money that is because we bought it used wait

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used no actually that is completely

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normal and fine as long as it was built by reputable manufacturer these things

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have no moving parts so they don't really wear out the way that you might

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imagine and it's extremely common to see scientific equipment like this on its

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third or fourth or fifth owner decades after it was first

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built of course it doesn't really look like anything special what makes it a a

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good one well this one honestly not much

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it took 3 weeks to ship and not only does it not match the picture on the

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website it is entirely the wrong size we ordered 16x 12 and they shipped us a

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13x13 not to mention that it is in

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horrible condition like seriously this thing looks like they stored it outside

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look how beat up these foam panels are like what even happened to the tips on

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this one and this one and this these are

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the most critical part of the chamber but since it's in this state anyway I

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guess nothing prevents me from cutting it open and giving you guys a little lesson about foam different kinds of

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Chambers those designed for acoustic use or radio frequency

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use wow this stuff is pretty heavy ah

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come on open up the point is they will use different kinds of foam materials in

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construction depending on their purpose ours is a high performance fire

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resistant theoretically so it is pidal foam EMC

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absorber EMC stands for electromagnetic

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compatibility and means that it shouldn't unintentionally generate

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reflect or retransmit electromagnetic interference oh that stinks of course no

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material is going to be absolutely perfect in this regard which is where

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the shape comes into play these pyramids aren't purely aesthetic but rather they

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have a function an electromagnetic wave like a sound wave can reflect off of a

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flat surface which means that if you're trying to measure the strength of a signal from a Wi-Fi router for example

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with a sensor here that bounce or realistically many

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bounces could interfere with your reading now to be clear acoustic and EMC

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products can be flat like the acoustic panels that we mounted for col me Chris

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and that will still help to reduce the energy of any waves that hit them but by

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employing this shape we give the waves

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multiple opportunities to bounce off of

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the sides of the pyramids before hopefully being nearly fully dissipated

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this elimination of bouncing waves is where an an eoic chamber gets its name

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an like not any echoic like not any

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Echoes not all Foams are created equal though like the highdensity foam that we

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use in our super comfortable straps on the LTT backpack LTD store.com and there

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are a couple of main differences between EMC foam like this and the kind that you

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would find in a Sound Chamber first up while both are made of polyurethane the

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density and the internal structure tends to be higher for acoustic applications

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compared to what we need the second major factor is that EMC foam like ours

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is carbon impregnated carbon has a lot of space in its outer electron orbitals

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allowing it to absorb energy which then

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gradually dissipates causing the electrons to fall back into their normal

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orbitals this makes it super effective like iron at blocking electromagnetic

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interference turning the entire chamber lined with this stuff into a sort of

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Faraday cage sort of For Better

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isolation what we should really have is high density ferite tiling that lines

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the inside of the chamber but a 2X 2 in tile okay is $8 which is why comparably

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sized Chambers with fite can run you into the millions of dollars that's a

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yikes the good news is that we don't actually need ferite tiling ferite is

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useful for blocking lower frequency waves and with it we could block signals

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all the way down to 26 to 30 MHz

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allowing us to test like am radios and

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stuff but I suspect most of you don't really care about that sort of thing

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anyway and besides without the ferite tiling we can still keep anything above

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800 MHz from passing through the walls into our chamber as for extremely high

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frequencies well we don't need to worry about those in here either because we've

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got a 10in thick concrete building all the way around us that is going to block

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them out nicely the finished chamber is going to be assembled right here and

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it's going to be about this big I'm walking around inside it right now which

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is a perfect fit for our consumer electronics devices along with our 4G 5G

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antenna cameras and any other measuring equipment that we will need when it's

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built but first story time as I already

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mentioned the picture on the website didn't match what was shipped but guys

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it gets way worse than that the seller never sold that chamber or even owned it

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in the first place I mean we thought we were at least buying a comparable one

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but it was completely different well could have been an innocent mistake

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right no not so much thanks to the

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contractor who ironically the seller ired to come out and build this thing

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for us we got in touch with the original seller of the actual pictur chamber and

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it turns out that they messaged these guys years ago telling them to remove

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those photos thing is the RF industry is

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pretty small and it seems like everyone knows everyone now thankfully we haven't

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actually wired the money for this so the obvious course of action was hey guys uh

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can you pack all this up and take it back and this I kid you not is their

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response it has been months of crickets

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now which I guess means I am the proud owner of many many piles and pallets of

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literal garbage it's not all bad though through the assembly contractor we were

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able to get in direct contact with some excellent EMC chamber manufacturers and

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we're hoping that the next time we update you guys on this it'll be with great news and maybe there's a way to

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make some lemonade out of the lemons the thing is the degradation of these

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pyramids means that we cannot trust this

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foam to evenly attenuate any RF in the interior space but it could still prove

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useful for our future sound isolation chamber which will be a dual wall design

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so there's no reason that we couldn't pack this stuff into the airspace

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between the inner and outer walls to improve the isolation even further as

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for the framing well

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we can use that to put together our camera testing chamber which is going to

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have consistent lighting and lots of fun little objects and test patterns that we

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can take pictures of to evaluate both Standalone and smartphone integrated

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cameras if I get my way it'll also have a little model train which I think would

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be sick as for the rest of it well I don't

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know hopefully we'll figure something out and they're not expecting us to send

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this back after leaving it with us and ignoring us for months I mean the way

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that I see it if they asked for it back at this point by the way you guys this

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looked like a lot come come come come come come come over here it's two layers

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thick no no no you got to see yeah here here can you see that it oh sorry sorry

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it's two it's two layers thick so if

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they ask for it back I think I'm just going to send them a storage invoice for

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their garbage and it might end up being a better deal for them to simply walk

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away like look I don't like to have to do it but if I have to go ruthless

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business guide then I I will I will cuz this is this

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ridiculous look at this it's got like tree debris on it like all over it

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that's not from us we've had it inside oh we haven't tested to see if it

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actually works at all for anything are you thinking what I'm thinking foam Fort

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foam Fort LMG 5 we're sitting at about 60

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okay okay and going into the chamber and

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then wow I'm already already at 70 and

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here we are while I may not be able to present the data we would collect from

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this chamber to you guys as valid results just because of all the issues

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with it can confirm carbon impregnated

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foam definitely does a thing in fact I'm

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using my onboard recorder right now that goes to the pack at my hip and we're

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going to switch over to the one that I am transmitting to our camera operator

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over there and you guys are going to see it's pretty bad Adam want to go ahead and close in the last

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spot here we go all also you're going to

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see that when I bust out of here this red SSID in the corner here is going to

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go from about minus 80 two here we

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go I dropped myself up to minus 50 all

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right I can't wait to have an actual working one just like I can't wait to

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tell you guys that you can see the full video of us building the blockport over

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on Floatplane decom and oh I also can't wait to tell you about our sponsor

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design philosophy of its predecessor with a brushed metal cover and Chevrons

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around each fan there's sections of different heat sink fins to disrupt

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unwanted airflow sounds to reduce noise and thermal pads under the metal back

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plate to provide additional cooling while ventilation reduces trapped Heat

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their Torx fans promise excellent longevity due to the double set of

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durable ball bearings that keep them spinning and there dual BIOS feature

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gives you control you can choose either full performance gaming or silence and

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they bundle in a support stand that can be attached to your case to hold up the

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card because hey every tank needs good support that's actually very funny I

00:12:12.800 --> 00:12:19.680
like the talking points so check out the RTX 490 Supreme at the link in the video

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description if you guys enjoyed this video you might also enjoy the one where

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we gave you guys a lab update on what's going on with keyboard testing so why

00:12:24.519 --> 00:12:32.839
don't you go check out that one um can I actually get a hand though

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just get that CL yeah CL yep no no for real like it y okay it's just at a

00:12:35.800 --> 00:12:40.199
really weird angle I couldn't get any Leverage