Hey ..you know your stuff around network strength... How dangerous or not dangerous is 5g actually... I mean...not only on the streets or inside a home ..I mean..with a tower on your roof and fith a full functioning network like we have now with 4g .. Would be really interesting to know what you think about this...
@Broke As FK oh God ...I would NEVER believe COVID19 has anything to do with 5g ...that's just stupid... But what I am believing are some tests from German and uk scientist. They've used 5g and high radiation 4g with some insects and these started to cannibalize and get really fvcked up while being tested ... Also I have really big problems with my heart when I let any source of electrical radiation in my bedroom active...so I AM a little bit concerned... Also ..I DON'T go into the sun either...
The Nickel silver Cylinders are tuned to correct frequency boost or resonance by adjusting antenna wires or screw close to the cylinders. works exactly as If you fill a waterbottle to different volumes and blow over the bottle opening; you get different tones depending on the water amount.
I pulled apart a similar unit that had doherty amplifiers in it. I was able to cut out sections of the PA's and they work very nice at 2.4ghz in non doherty mode with minimal tuning. Those diplexers are a work of art!
I love videos like this. Thank You for the tear-downs. I made the diplexer high-res snap my facebook title photo with the link to Your web of course. I can't stop looking at it.
The Chinese characters said "The oxidation process (of the aluminum casing) passes the anti-corrosion (e.g. 168 hrs continuous salt fog corrosion) test requirement".
@@KaizerPowerElectronicsDk The reason for me to write it as clear as possible, because I had been worked in one of such facilities, which handled the aluminum parts anonadization process for Huawei and Apple. They were among the pickiest customers; only slightly better than airliner parts (e.g. handrails).
I do believe the long copper rod with plastic spacers at the bottom of the screen at 16:00 is an implementation of coax. Once the top cover is on it would be an enclosed cavity. The parent stock is already big enough that it would have been cheaper to tool that slot than to add another pair of connectors
It would have to be a external unit as the enclosure did not have any holes for forced air cooling. I guess this is a pure convection cooled unit, which is doable when it is mounted in the top of a tower.
I use AnSoft's HFSS software to simulate high speed interface design on PCB and radiative cavity designs, this outs a smile on my face. Such design we run on a cloud, as regular maxed out PC with best processors would take weeks to do.
Many times electrical Engineering concepts are learned in the abstract/simbolic/squematic dimension. That openned resonator filtering cavitie really clears one of those concepts. Physically filtering (modeling the frequency response curb) of electromagnetic radiation is almost witchcraft with all the orthogonal issues involved. I wonder if that cavety structure was designed empirically/manually/trial-and-error or by software simulation. I have handle those models myself some years ago when the 4g was a new thing.
Crazy! RF stuff is weird, that a low/high pass can be made with just the geometry of the diplexer... How do these get designed, are there programs which optimize the geometry exactly?
Think about the 5G base stations and their power usage! Might be worth it for some areas. It will help in cities where the internet is quite saturated with people on the net and where it is still is adsl and coax.
I machined resonator filters for Ericsson for a year, we had 19 procent recected parts . but then they moved all to china . one year later im back making this shit again , the chinese foundery and machining factory had 95 procent rejected parts . nice.
TTLt106 the US is no better, they monitor everybody through the giant high tech companies, they harvest globally by their power, they spread wars and poverty in developing countries, they kill women and children in the Mid East, then Europe is forced to wipe their shit by accepting the refugees they have created, how evil is this? Boycott China and US, boycott every super power!!!
The Chinese QC has improved a lot for the past 10 years. Every country need a learning curve. I works in UK Dyson. My supervisor told me that in 60,70's they were using a lot of Japanese transistors because the price was much cheaper than the European ones. But the quality was so bad, they have to spent a lot of time to test the parts and in the end it turn out to be more expensive than just order the European parts. It just took japan 20 years to catch up and surpass the European quality. Same story for German quality, MADE IN GERMANY was meant to be a humiliation towards German product by Britain Government.
Does anyone know how they tune those multi-resonator filters? I recently found out how to build and tune bandpass filters with two resonators. I would like to make filters with more resonators but I dont understand how to tune them. There are too many variables to adjust! There has to be some adjustment procedure for that but I cant find anything :(
I seem to recall a commenter long ago, talking about how this is all done with servo/stepper motors on all the adjustment screws and its a algorithm that tunes it all. Almost impossible to do 100 variables by hand...
With the growth of the cutoff frequency, radio devices are more and more like plumbing fixtures. Channels, compartments, tubes, seals))) But how beautiful it is, these are magical devices!
A #diplexer is a passive device that implements frequency-domain multiplexing. "Two ports" (e.g., L and H) are multiplexed onto a third port (e.g., S). The signals on ports L and H occupy disjoint frequency bands. Consequently, the signals on L and H can coexist on port S without interfering with each other 18:37 & "Right Insulators" some study "software defined radio" modulation as #RDS add-on functionality...
@@KaizerPowerElectronicsDk my dad started designing wave guide antennas a few years back but the guy that got him started tried scamming him so he basically just shut it down on him. but i did help him make a few up, there is one down in Brazil providing internet access that someone looking to provide it bought, one in Greece and one in Texas that i can remember and that guy has a 70 mile range with his! they were aluminum tube that he'd drill out and put end plates in and then filed all the holes to perfection to tune it.
I used to do that job ... back in the mid 90's ... it's fun the first few times but when you're doing 16 per day day after day... but this looks easier to tune than the ones we were making. this is a dual diplexer (2 complete separate units) 9 resonators with 2 inverted poles on the transmit side and 7 resonators with 1 inverted pole on the receive side of each one. Ours were 12(2-) poles and 5(1-), and they get exponentialy more difficult with more poles...
@@thkatsou i'm not sure what they had for a setup, my dad was the one that talked with the guys that bought it to put up but i do remember it was a 70 mile range they got. not sure if they were testing new equipment with it or what. the antenna we built was able to be tuned slightly and we made a few in the 5 GHz range but most were 2.4GHz with "wings" on them to increase the strength of the field. the antennas themselves were about 3.5 to 4' tall and the feed cones inside were custom built by my dad, he's pretty meticulous when it comes to that kind of stuff being an engineer.
Not sure if someone else commented this in the years this has been up, but in all likelihood that date on the inside of the termination cover is in the WWYY format used on ICs; I.e. it's saying the 23rd week of 2012, which means it was potentially qualified a little before final assembly.
E and W would probably be east and west, perhaps so you can daisy chain a couple of these units together from a single network feed. Standard network engineering terminology when building rings.
ABD AL-RHMAN AL-TAWDY It’s a diplexer apparently, a passive device to high and low pass filter the signal coming in and out of the antenna. Why it looks like that, I have no idea.
Hi, is it possible to use the Power Amplifier of the RRU to amplify a signal from a signal generator and the connect the output of the RRU to an antenna??? thank you
I guess that if you feed a signal directly into the power amplifiers pre-amplifier you have bypassed a lot of the pre-checks. But there might still be some shutdown mechanisms on the output part of the power amplifier. But if you supply the power to the power amplifiers from off the board aswell it will properly work in full manual mode, but then you lost all the advantage of the high tech driver and processing boards, so I am not sure you really gain anything useful.
@@KaizerPowerElectronicsDk thank you very much, I heard somebody took an rru and somehow use the rru power amplifier to amplify a cw signal. The purpose was not to use the other components, it was just to find a high power amplifier for a not so common frequency band and perform some CW testing. I think there isnt a port to feed the amplifier and if so, somebody has to tell the rru via command or something what channel and what power etc etc... Do you think that its possible?
@@jrmg5556 Maybe on the older 2G/3G generations where I have seen config files in plain text on memory cards, but the newer 3G/4G are just becoming such a integrated mystery box that its really hard to even follow traces from system board to amplifier. So I guess it would take a mobilephone RF designer to reverse engineer it aswell
12.23.11 that is written in the lid, corresponds very well with the the sticker at 5:19 May 18th 2012 could be 12.18.05, but the text in the lidt could be anything since its a later date than the sticker.
RF electro magnetic radiation. The short answer is: it moves like waves in water. The long answer: www.comsol.com/blogs/your-guide-to-the-physics-interfaces-and-studies-in-the-rf-module/
You are lucky that I made a video about these kinds of filters where I try to cook it down to the most important details without requiring a masters degree in RF electronics: Duplexer band pass filter explained: ua-cam.com/video/HNaAQ3a7Duc/v-deo.html
What is that "diplexer" for? What are those cavities and resonators actually doing? The term "Resonator" sounds like a narrow bandpass-filter with high feedback, but why is this not done with electronic circuits?
My brain isn’t working, hah, Common something radio interface... had to google it to figure out the something Common Public Radio Interface. I was thinking telco not cellular gear.
Yes, it has to do with the network connection " This connection (often referred to as the Fronthaul network) can be a fiber to an installation where multiple remote base stations may be served."
Kaizer Power Electronics In this case I think Huawei supports 2 cascaded RRU connected to a single BBU port. I am curious where you found this unit as it is my understanding that the only Danish operator using Huawei RAN is TDC and this unit seems a bit old to come from TDC!
Okay, so tha way they can do 6 antenna LTE, but it requires many amplifiers and uses a lot of power. I also thought that TDC was the only operator using Huawei, so either they started out with old equipment or its from somewhere else. Its from a scrap yard, no idea about the origin.
Now if I could only find a BDA for my home, need something that works GSM 900/1800 MHz as well as 3/4G networking. The service in my home is absolutely terrible. Brings back memories of my 25 years as an RF technician. Any European suppliers for RF equipment here in the EU similar to my suppliers of Tessco and Hutton communications in the USA?
I just subscribed yesterday and i have to say this kind of content is super interesting. I just would like to ask, how much is the average price of this class of apparatus? Thanks for the content, gentleman.
As scrap it has a rather low value. Mixed aluminium, steel, Electronics and plastic. So maybe around 1€/kg if you find someone that wants the gold plated boards out. But properly much less. You can find them at 1000-3000$ used or NOS on alibaba. From new... Properly pretty expensive, anyone knows?
@@KaizerPowerElectronicsDk thank you, i'll stay tuned for some more base stations teardowns since this goodness isn't really easy to find anywhere else. ;)
E and W mean East and West. They are the two direction to create a ring connection. The ring topology allows for single failure of a ring segment.They obviously have no relation with geography they just mean that you have to connect a East port to a West port on another apparatus and viceversa.
Interesting, there must be some history behind that, that the first designs was facing east and west. Normally from redundant networking in industrial settings, we call it A and B.
@@KaizerPowerElectronicsDk In a redundant 1+1 leg of a star topology you would generally call it A and B. However in a ring topology of interconnected nodes which each can be transit nodes for others then E and W is common terminology for traffic between nodes at the same tier. North/South topologically would be up and down the network tiers.
No, these are tightly specified around +/- 100 MHz of its working frequency. I think you would need to change the resonators to get another frequency span.
@@SteveWrightNZ It's not that simple. The resonances of the resonators are all interlinked and the design of this is extremely precise and mathematically super complex. Getting anything even slightly (0.1mm) out of place, even without changing the design, will result in very little functionality. This is the reason for the tuning screws, because manufacturing tolerances are insufficient to get the system well enough in tune to work (like, *at all*). I doubt this one will be in spec when reassembled, even without moving the screws, just because the lid will be on slightly different.
@@treelibrarian7618 Well, you get ham radio people who try things and people who don't. I'm not trying to find people who don't try things and say it cant be done.
@Tree Librarian and @Steve Wring There is amateurs working on reverse-engineering these power amplifier modules, here is a good example of one from my teardowns: highvoltageforum.net/index.php?topic=765.0
When you pass electricity through electrodes in a conductive solution, the negative side gets electrons from power source, and gets reduced. The positive side loses electrons vice versa and gets oxidized. To prevent occasional leakage to cause corrosion to the power cable, telecom gears use negative input, so that the ground is positive, and the core is negative. If there is a leakage, the much larger ground wire (usually the shield) gets corroded, rather than the much thinner core, so it is more resilient to corrosion.
Someone: Just trim it a bit. You look immature. Dude: Impossible! I look fabulous. Must be jealous. It means I'm on the right track. It means, I should grow them even bigger!
Everything is returned to the owner for metal scrapping, as it is highly valuable boards due to the gold and other precious metal contents. A board like this is properly around 5-15 Euro in scrap depending on content.
Contact me through here kaizerpowerelectronics.dk/about/contact/ I soon got a newer and smaller base station amplifier. I can send you a picture of the board once its out and you can get it at scrap value + shipping :)
From the HAM operators I have talked to, no, these are simply too complex and specific to the job (900/1800/2100 MHz) to be reused as a whole piece of equipment.
I have a total of 17x RF base station teardown videos in my 49 video long teardown playlist: ua-cam.com/play/PLw4xMO1xCMSV9REhsRRaTXc-AULq7lAJl.html
Have you got the second part of this up? I'm getting "Video Unavailable" from the link in the description.
Сбрей свои дурацкие усы!
Hey ..you know your stuff around network strength...
How dangerous or not dangerous is 5g actually...
I mean...not only on the streets or inside a home ..I mean..with a tower on your roof and fith a full functioning network like we have now with 4g ..
Would be really interesting to know what you think about this...
@Broke As FK oh God ...I would NEVER believe COVID19 has anything to do with 5g ...that's just stupid...
But what I am believing are some tests from German and uk scientist. They've used 5g and high radiation 4g with some insects and these started to cannibalize and get really fvcked up while being tested ...
Also I have really big problems with my heart when I let any source of electrical radiation in my bedroom active...so I AM a little bit concerned...
Also ..I DON'T go into the sun either...
@Andrew C definitely...I am just curious what's up with actual facts ...so I'm asking many different people and filter all the informations ...
15:00 Looks like ancient alien technology.
That's exactly what it is, just not ancient yet.
In fact, it is already ancient, it was decommissioned due to upgrades.
Technically, it is Winne the Pooh technology, honey-color included.
Stargate SG-1
СВЧ-тракт для непосвящённого ВСЕГДА выглядит как "технология чужих")
The Nickel silver Cylinders are tuned to correct frequency boost or resonance by adjusting antenna wires or screw close to the cylinders. works exactly as If you fill a waterbottle to different volumes and blow over the bottle opening; you get different tones depending on the water amount.
They also make for nice standoffs when reused in building other stuff :)
Reminds me on Helmholtz resonance...
did you fly a biplane in ww1 ?
*Puts on leather jacket and helmet*
Just found your channel and I had to subscribe. I love interesting teardowns. Thanks for letting us experience it with you.
Thank you for subscribing :)
Camera was losing focus because it was distracted by that amazing moustache.
not as distracted as i.
tis the reason i glanced down to the comments
I know right! Majestic!
\
I think it is glued on for a play he is in.
I pulled apart a similar unit that had doherty amplifiers in it. I was able to cut out sections of the PA's and they work very nice at 2.4ghz in non doherty mode with minimal tuning. Those diplexers are a work of art!
Damn, I installed and deinstalled hundreds of those without ever looking inside them. Thanks for the video. :)
That's crazy. Rf is the ultimate analog. Look at all those tuned resonant cavities!
I love videos like this. Thank You for the tear-downs. I made the diplexer high-res snap my facebook title photo with the link to Your web of course. I can't stop looking at it.
I've never seen anything like that before, absolutely amazing.
So well made and amazing.
i just stumbled on this channel and its highly interesting.... plz explain everything and make it easy to us noobs to understand
Beautiful work
Thank you for the Good Video. Now i can build my own!
I wonder if the plastic removable covers are for forced air cooling if it's used inside as the airflow would be parallel to the fins
That is a good suggestion!
The plastic shields are commonly known as sun shields on RRHs, they are to protect the unit from direct sunlight which improves cooling.
What a time to be alive!
The Chinese characters said "The oxidation process (of the aluminum casing) passes the anti-corrosion (e.g. 168 hrs continuous salt fog corrosion) test requirement".
Pretty high efficiency in those characters. They are like 4TB disk of information in each.
@@KaizerPowerElectronicsDk The reason for me to write it as clear as possible, because I had been worked in one of such facilities, which handled the aluminum parts anonadization process for Huawei and Apple. They were among the pickiest customers; only slightly better than airliner parts (e.g. handrails).
氧化合格 Qualified (against) oxidation
Am I the only one who thought it was a water cooling block?
Same ! :)
You are like 50+ IQ from the correct answer. :)
Same
Kevin Kristiansen same looool but at the same time I though there is no rubber insulation and looked at the cover I find so many holes
It's not?
I do believe the long copper rod with plastic spacers at the bottom of the screen at 16:00 is an implementation of coax. Once the top cover is on it would be an enclosed cavity. The parent stock is already big enough that it would have been cheaper to tool that slot than to add another pair of connectors
Great video, great moustache.
Damn well built
Thank you for sharing video. I have a question. Does this RRH have motor fan to cool ? If not , it has only heat sink to coo ?
It would have to be a external unit as the enclosure did not have any holes for forced air cooling. I guess this is a pure convection cooled unit, which is doable when it is mounted in the top of a tower.
Power RF voodoo is weird and organic looking.
I am sure those are fan mounts, for cabinet, low-latitude, etc.
Greg S. on ZTE RRUs, that’s where the mounting bracket goes.
beautiful!
This is your daily dose of Recommendation
Huawei is also an expert at networking infrastructure.
So that is where all the traffic comes from... I won the youtube algorithm lottery.
@@KaizerPowerElectronicsDk you are being lucky right now.
Nice video
How are the accustics calculated for the channels?
Hmm.. Intresting!
Maybe you can explain and show whats the different between 2G - 4G and 5G Antennas are.
I use AnSoft's HFSS software to simulate high speed interface design on PCB and radiative cavity designs, this outs a smile on my face. Such design we run on a cloud, as regular maxed out PC with best processors would take weeks to do.
Thank you for sharing how its done in real life :)
wonderful !!!!!
Your mustache is lit 🔥
Many times electrical Engineering concepts are learned in the abstract/simbolic/squematic dimension. That openned resonator filtering cavitie really clears one of those concepts. Physically filtering (modeling the frequency response curb) of electromagnetic radiation is almost witchcraft with all the orthogonal issues involved. I wonder if that cavety structure was designed empirically/manually/trial-and-error or by software simulation. I have handle those models myself some years ago when the 4g was a new thing.
I had to google orthogonal
My god, that thing is a work of art.
Crazy! RF stuff is weird, that a low/high pass can be made with just the geometry of the diplexer...
How do these get designed, are there programs which optimize the geometry exactly?
There is powerful tools to do these kinds of calculations: www.ansys.com/products/electronics/ansys-hfss
what a marvel piece of electronics.
I have no idea what this is or does but thoroughly enjoyed the video anyway, thanks 👍
It's what your phone connects to on the cellphone tower.
Anonymous user cheers for that Mr Anonymous 👍
It’s this guys vape mod.
Brad Foster 😂
Think about the 5G base stations and their power usage! Might be worth it for some areas. It will help in cities where the internet is quite saturated with people on the net and where it is still is adsl and coax.
Great disguise. I'm digging the moustache! Don't let them find out who is exposing their old equiptment. Lol
I have installed over a thousand of those.
I machined resonator filters for Ericsson for a year, we had 19 procent recected parts . but then they moved all to china . one year later im back making this shit again , the chinese foundery and machining factory had 95 procent rejected parts . nice.
19% really tells a story about the strict specifications for filter cavities. Thank you for sharing.
TTLt106 the US is no better, they monitor everybody through the giant high tech companies, they harvest globally by their power, they spread wars and poverty in developing countries, they kill women and children in the Mid East, then Europe is forced to wipe their shit by accepting the refugees they have created, how evil is this? Boycott China and US, boycott every super power!!!
@@janfischer2844 don't girlcott the humanitarian superpower Sweden
@@cesteres wtf?
The Chinese QC has improved a lot for the past 10 years. Every country need a learning curve. I works in UK Dyson. My supervisor told me that in 60,70's they were using a lot of Japanese transistors because the price was much cheaper than the European ones. But the quality was so bad, they have to spent a lot of time to test the parts and in the end it turn out to be more expensive than just order the European parts. It just took japan 20 years to catch up and surpass the European quality. Same story for German quality, MADE IN GERMANY was meant to be a humiliation towards German product by Britain Government.
Thanks
Does anyone know how they tune those multi-resonator filters? I recently found out how to build and tune bandpass filters with two resonators. I would like to make filters with more resonators but I dont understand how to tune them. There are too many variables to adjust! There has to be some adjustment procedure for that but I cant find anything :(
I seem to recall a commenter long ago, talking about how this is all done with servo/stepper motors on all the adjustment screws and its a algorithm that tunes it all. Almost impossible to do 100 variables by hand...
With the growth of the cutoff frequency, radio devices are more and more like plumbing fixtures. Channels, compartments, tubes, seals)))
But how beautiful it is, these are magical devices!
Very interesting
A #diplexer is a passive device that implements frequency-domain multiplexing. "Two ports" (e.g., L and H) are multiplexed onto a third port (e.g., S). The signals on ports L and H occupy disjoint frequency bands. Consequently, the signals on L and H can coexist on port S without interfering with each other 18:37 & "Right Insulators" some study "software defined radio" modulation as #RDS add-on functionality...
omg that thing looks like a hell of a fun RF tuning adventure!
I hope they have robots for that. 20 servo driven screw drivers to a tuner :)
@@KaizerPowerElectronicsDk my dad started designing wave guide antennas a few years back but the guy that got him started tried scamming him so he basically just shut it down on him. but i did help him make a few up, there is one down in Brazil providing internet access that someone looking to provide it bought, one in Greece and one in Texas that i can remember and that guy has a 70 mile range with his! they were aluminum tube that he'd drill out and put end plates in and then filed all the holes to perfection to tune it.
I used to do that job ... back in the mid 90's ... it's fun the first few times but when you're doing 16 per day day after day... but this looks easier to tune than the ones we were making. this is a dual diplexer (2 complete separate units) 9 resonators with 2 inverted poles on the transmit side and 7 resonators with 1 inverted pole on the receive side of each one. Ours were 12(2-) poles and 5(1-), and they get exponentialy more difficult with more poles...
@@ToeCutter454 those things were used in point to point connections?
@@thkatsou i'm not sure what they had for a setup, my dad was the one that talked with the guys that bought it to put up but i do remember it was a 70 mile range they got. not sure if they were testing new equipment with it or what. the antenna we built was able to be tuned slightly and we made a few in the 5 GHz range but most were 2.4GHz with "wings" on them to increase the strength of the field. the antennas themselves were about 3.5 to 4' tall and the feed cones inside were custom built by my dad, he's pretty meticulous when it comes to that kind of stuff being an engineer.
Not sure if someone else commented this in the years this has been up, but in all likelihood that date on the inside of the termination cover is in the WWYY format used on ICs; I.e. it's saying the 23rd week of 2012, which means it was potentially qualified a little before final assembly.
There is another comment further down where we discussed the date stamps :)
E and W would probably be east and west, perhaps so you can daisy chain a couple of these units together from a single network feed. Standard network engineering terminology when building rings.
15:09 what is this exactly and the technology behind it/ theory behind it
ABD AL-RHMAN AL-TAWDY It’s a diplexer apparently, a passive device to high and low pass filter the signal coming in and out of the antenna. Why it looks like that, I have no idea.
Awesome
Ah yes I see; enslaved black magic.
Hi, is it possible to use the Power Amplifier of the RRU to amplify a signal from a signal generator and the connect the output of the RRU to an antenna??? thank you
I guess that if you feed a signal directly into the power amplifiers pre-amplifier you have bypassed a lot of the pre-checks. But there might still be some shutdown mechanisms on the output part of the power amplifier. But if you supply the power to the power amplifiers from off the board aswell it will properly work in full manual mode, but then you lost all the advantage of the high tech driver and processing boards, so I am not sure you really gain anything useful.
@@KaizerPowerElectronicsDk thank you very much, I heard somebody took an rru and somehow use the rru power amplifier to amplify a cw signal. The purpose was not to use the other components, it was just to find a high power amplifier for a not so common frequency band and perform some CW testing. I think there isnt a port to feed the amplifier and if so, somebody has to tell the rru via command or something what channel and what power etc etc... Do you think that its possible?
@@jrmg5556 Maybe on the older 2G/3G generations where I have seen config files in plain text on memory cards, but the newer 3G/4G are just becoming such a integrated mystery box that its really hard to even follow traces from system board to amplifier. So I guess it would take a mobilephone RF designer to reverse engineer it aswell
Can someone please tell me what is the bottom "empty" copper part about? Is that for cables?
It is a duplexer band pass filter and I explained it here: ua-cam.com/video/HNaAQ3a7Duc/v-deo.html
4:36, Date usually be formatted with YYYY/MM/DD in China. Anyway, I do not find any information about date on the metal shield.
12.23.11 that is written in the lid, corresponds very well with the the sticker at 5:19 May 18th 2012 could be 12.18.05, but the text in the lidt could be anything since its a later date than the sticker.
fascinating.
Co to jest? Z kont się wzięły te nieregularne kształty wewnątrz? Gdzie można o tym poczytać?
Great Videos. I am going to buy you a power screwdriver for Christmas.. :)
I can not wait to get that package from you ;) All kinds of donations are possible at kaizerpowerelectronics.dk/about/donation/
Explain what's up with those small Chambers with cups and when cover with pegs in place over cups.
Duplexer band pass filter explained: ua-cam.com/video/HNaAQ3a7Duc/v-deo.html
Anyone know what software Huawei uses to model the waves thru the diplexer?
Another commenter mentioned that they use this at his work: www.ansys.com/products/electronics/ansys-hfss
@@KaizerPowerElectronicsDk Thank You! I will check it out.
BTW, I am completely joking about the mustache thing. Diversity is awesome.
What is moving in and through the empty cavities in the diplexer?
RF electro magnetic radiation. The short answer is: it moves like waves in water. The long answer: www.comsol.com/blogs/your-guide-to-the-physics-interfaces-and-studies-in-the-rf-module/
Where can I read about such volume resonators as at 15:00 ?
You are lucky that I made a video about these kinds of filters where I try to cook it down to the most important details without requiring a masters degree in RF electronics: Duplexer band pass filter explained: ua-cam.com/video/HNaAQ3a7Duc/v-deo.html
Nice moustache bro...
What is that "diplexer" for? What are those cavities and resonators actually doing? The term "Resonator" sounds like a narrow bandpass-filter with high feedback, but why is this not done with electronic circuits?
Duplexer band pass filter explained: ua-cam.com/video/HNaAQ3a7Duc/v-deo.html
@@KaizerPowerElectronicsDk thx :)
Feels like alien technology to me.
CPRI is probably channelized primary rate interface... -E for east and -W for West.
My brain isn’t working, hah, Common something radio interface... had to google it to figure out the something Common Public Radio Interface. I was thinking telco not cellular gear.
Yes, it has to do with the network connection " This connection (often referred to as the Fronthaul network) can be a fiber to an installation where multiple remote base stations may be served."
Kaizer Power Electronics In this case I think Huawei supports 2 cascaded RRU connected to a single BBU port. I am curious where you found this unit as it is my understanding that the only Danish operator using Huawei RAN is TDC and this unit seems a bit old to come from TDC!
Okay, so tha way they can do 6 antenna LTE, but it requires many amplifiers and uses a lot of power. I also thought that TDC was the only operator using Huawei, so either they started out with old equipment or its from somewhere else. Its from a scrap yard, no idea about the origin.
I’m curious, is this cavity technology considered solid state?
No, it is a pure analog filter.
Now if I could only find a BDA for my home, need something that works GSM 900/1800 MHz as well as 3/4G networking. The service in my home is absolutely terrible. Brings back memories of my 25 years as an RF technician. Any European suppliers for RF equipment here in the EU similar to my suppliers of Tessco and Hutton communications in the USA?
I just subscribed yesterday and i have to say this kind of content is super interesting. I just would like to ask, how much is the average price of this class of apparatus?
Thanks for the content, gentleman.
As scrap it has a rather low value. Mixed aluminium, steel, Electronics and plastic. So maybe around 1€/kg if you find someone that wants the gold plated boards out. But properly much less. You can find them at 1000-3000$ used or NOS on alibaba. From new... Properly pretty expensive, anyone knows?
@@KaizerPowerElectronicsDk thank you, i'll stay tuned for some more base stations teardowns since this goodness isn't really easy to find anywhere else. ;)
@@genericdynamics6618 Thank you for the sub. I got some more Nokia Siemens gear in editing, 2 power amplifiers :)
thumbnail invokes my trypophobia
May I know, how did you get it?
Found at privately owned scrap metal recycler company.
After watching this video I still have no idea what that thing is...
Duplexer band pass filter explained: ua-cam.com/video/HNaAQ3a7Duc/v-deo.html
"A thing of beauty a joy forever " Dave Jones /Willie Wonka
Why 200 screws, are they used for adjustments?
To avoid RF energy leaking out and noise getting in. Only the painted/counternut screws are for adjustment.
*_What is a diplexer?_*
Duplexer band pass filter explained: ua-cam.com/video/HNaAQ3a7Duc/v-deo.html
Good for a ham repeater project.
Looks like Alien tech, i am baffled
Нихуя не понятно, но очень интересно!
Особенно доставила аналоговая СВЧ часть. Красотень неземная )
16:20 all this, antenna ? My English is not good.
Filter, you can find antenna in my other videos.
E and W mean East and West. They are the two direction to create a ring connection. The ring topology allows for single failure of a ring segment.They obviously have no relation with geography they just mean that you have to connect a East port to a West port on another apparatus and viceversa.
Interesting, there must be some history behind that, that the first designs was facing east and west. Normally from redundant networking in industrial settings, we call it A and B.
@@KaizerPowerElectronicsDk I don't go farther than SDH/SONET networks and such terminology was already present there is 1997-ish.
@@KaizerPowerElectronicsDk In a redundant 1+1 leg of a star topology you would generally call it A and B. However in a ring topology of interconnected nodes which each can be transit nodes for others then E and W is common terminology for traffic between nodes at the same tier. North/South topologically would be up and down the network tiers.
i could have a use for this RF module
Are you asking to buy a power amplifier output module?
15:59 Whaaat the heck is that thing
Duplexer band pass filter explained: ua-cam.com/video/HNaAQ3a7Duc/v-deo.html
This is the best ever! Have you many of those?
Follow the link to my play list for teardowns and you can find 17 RF related videos.
Why the cavities. What's their function, resonances?
Band pass filter for the received and transmitted signals, Duplexer band pass filter explained: ua-cam.com/video/HNaAQ3a7Duc/v-deo.html
It started from an ESP32 WiFi antenna which seem shorted to ground just after started
that mustache from 1800s :d
Will that diplexer go up to the 2.4GHz ham band?
No, these are tightly specified around +/- 100 MHz of its working frequency. I think you would need to change the resonators to get another frequency span.
@@KaizerPowerElectronicsDk It seems those cups could be machined down easily, and a nice 2.4G project might be realised.
@@SteveWrightNZ It's not that simple. The resonances of the resonators are all interlinked and the design of this is extremely precise and mathematically super complex. Getting anything even slightly (0.1mm) out of place, even without changing the design, will result in very little functionality. This is the reason for the tuning screws, because manufacturing tolerances are insufficient to get the system well enough in tune to work (like, *at all*). I doubt this one will be in spec when reassembled, even without moving the screws, just because the lid will be on slightly different.
@@treelibrarian7618 Well, you get ham radio people who try things and people who don't. I'm not trying to find people who don't try things and say it cant be done.
@Tree Librarian and @Steve Wring There is amateurs working on reverse-engineering these power amplifier modules, here is a good example of one from my teardowns: highvoltageforum.net/index.php?topic=765.0
were is the laser and why its there?
The laser warning is due to the optical network interface, there is no big scary laser inside.
That thing look so strange..... almost like the I side of a manifold cover
Did the sticker say negative 45V or positive 45V?
Weird labeling if it's actually positive 45V
Telco is usually -48
When you pass electricity through electrodes in a conductive solution, the negative side gets electrons from power source, and gets reduced. The positive side loses electrons vice versa and gets oxidized. To prevent occasional leakage to cause corrosion to the power cable, telecom gears use negative input, so that the ground is positive, and the core is negative. If there is a leakage, the much larger ground wire (usually the shield) gets corroded, rather than the much thinner core, so it is more resilient to corrosion.
Someone: Just trim it a bit. You look immature.
Dude: Impossible! I look fabulous. Must be jealous. It means I'm on the right track. It means, I should grow them even bigger!
You are 100% right. It is even more in these corona times, not getting out often, its more like 3-4 days between a shave than daily :)
And i thought my 25W FM transmitter was dope....
Have you found any spyware in there?
It reminds me more of one of the old white Xbox 360's than it does an iPhone.
What the mustache LMAO
I am an electrician, I have a mustachio as well
Deal with it
Looks like military signal jammer
I used to make and tune diplexers...
What kinds and for what?
Would love to get one of those main boards when you have finished filming
Everything is returned to the owner for metal scrapping, as it is highly valuable boards due to the gold and other precious metal contents. A board like this is properly around 5-15 Euro in scrap depending on content.
Would have been happy to pay, was not expecting anything for nothing!
Contact me through here kaizerpowerelectronics.dk/about/contact/
I soon got a newer and smaller base station amplifier. I can send you a picture of the board once its out and you can get it at scrap value + shipping :)
Would the RF stuff - specifically the power amplifiers - be easily modified to work on an amateur radio band?
From the HAM operators I have talked to, no, these are simply too complex and specific to the job (900/1800/2100 MHz) to be reused as a whole piece of equipment.
Who knew cellular networks ran on copper plated engine heads lol