Massive Rack Upgrade for the Homelab! Geerling Engineering 2022-05-18 | Every now and then you run out of rack space. Or you need to mount a 300 lb server. And that's why we upgraded the rack in Jeff's basement!What are your favorite rackmount tips and tricks? Is there any piece of gear you just can't live without in your racks?Support me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.com2nd Channel: youtube.com/c/GeerlingEngineering#Homelab #Rackmount #SelfhostedAll the gear mentioned in this video: - StarTech.com 25U Open Frame Server Rack: amzn.to/3LmGw3q - StarTech.com 4-Piece Caster Kit: amzn.to/39VrILV - Neat Patch Cable Management Unit: amzn.to/3wllI88 - StarCase.com Cage Nut Insertion Tool: amzn.to/3NoYqE7 - Tripp Lite Isobar 12-outlet surge protector: amzn.to/3Lmf8Cv - APC Smart-UPS 2200 RM XL: amzn.to/3Lnlf9Q - ASUSTOR Lockerstor 4 AS6604T (primary NAS): amzn.to/3yNnyjF - ASUSTOR Drivestor 4 Pro AS3304T (backup NAS): amzn.to/3MrBm7l - Mikrotik 10G Cloud Router Switch (CRS309-1G-8S+IN): amzn.to/3PnteqF - (Let us know if there's anything else I missed you'd like to see here!)Contents:00:00 - Why a new rack?01:18 - Assembly + Homelab philosophy03:40 - Planning the move (and hijinks)06:14 - Beginning the move08:09 - UPSes are heavy09:16 - IoT bedtime woes09:37 - Finishing the move11:17 - Final touches 12:40 - Bonus content - fancy wood top!
Can we turn a bratwurst into a radio speaker? (ft Plasma Channel) Geerling Engineering 2024-09-03 | What do you get when you touch a bratwurst or a pickle to 7 kW of AM RF? Science!Note: DO NOT mess with AM towers. Or, really, any towers which you're not qualified to work on. RF burns hurt—and they don't really heal.Check out all our experiments at the 12 kW AM radio transmitting site just outside St. Louis, MO, with special guest Jay from @PlasmaChannel!Related videos: - Plasma Channel's video: youtube.com/watch?v=NowhPAMDOTo - Original hot dog experiment: youtube.com/watch?v=GgDxXDV4_hc - Phasor video - 8 tower AM array: youtube.com/watch?v=49bwwQxUgcsAnd huge thanks to Covenant Network for allowing us to do our testing on their equipment, and to Adam Wright, who coordinated with us for the bratwurst experiments :)Support me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.comMain Channel: youtube.com/@JeffGeerlingContents:00:00 - Plasma and high-power AM radio00:57 - Hot Dog02:02 - Pickle02:48 - How does AM radio work?04:04 - Pickle, Analyzed and Tasted05:40 - Bratwurst06:05 - Vegan Hot Dog06:47 - Corn Dog08:14 - A.M. Breakfast Sausage08:39 - Hot Dog Warmer09:50 - Did we break the transmitter?11:52 - How is the signal affected?
Cooking with AM radio Geerling Engineering 2024-08-21 | DO NOT ATTEMPT! Full video coming soon, but here's a taste of our experiments with the 12kW AM transmitter, cooking hot dogs on a stick.Any questions? Please comment!Support me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.comMain Channel: youtube.com/@JeffGeerling
When smartphones fail — free P2P wireless mesh networking Geerling Engineering 2024-07-24 | Open source, off-grid, decentralized mesh networking on small, affordable devices. That's Meshtastic!You can learn more about the protocol and how to get started at meshtastic.orgHUGE thanks to Muzi Works for reaching out after Open Sauce and sending over their H1 and R1 pre-built Meshtastic radios! You can find out more about them and see all their products here: muzi.worksThey did not pay us anything to make this video, but they did send the radios that we're using to learn Meshtastic (thus the 'Paid sponsorship' disclosure at the beginning of the video!).I've also ordered a few extra radios and my Dad and I are starting to learn about this fancy new radio tech! The map I showed near the end of the video is here: meshmap.netThere's another map here: meshtastic.liamcottle.net — and there are even others out there too... it's kind of the wild west right now in Meshtastic-land!Support me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.comJeff's Main Channel: youtube.com/@JeffEngineering3rd Channel: youtube.com/@Level2JeffContents:00:00 - What is Meshtastic?01:33 - Setting up the node04:30 - First mesh message!06:08 - We're still learning07:41 - Meshtastic uses?
This AM radio still costs thousands of dollars—why? Geerling Engineering 2024-06-05 | My Dad put his Potomac FIM-21 Field Intensity Meter on the bench.In 1986, this radio cost $1,950—which is nearly $6,000 today! (And this isn't even the most expensive AM radio today—there's a newer version for $15,000!)It measures the field intensity of AM radio signals in volts, and a calibrated unit like this one can be used for official readings sent to the FCC for broadcast stations in the US.A few other things we mentioned in this video (some links are affiliate links): - Potomac FIM-21 Field Intensity Meter: pi-usa.com/legacy-products - RTL-SDR v4 dongle: amzn.to/3KvDbku - SaferCCTV AN-200 Indoor AM Loop Antenna: amzn.to/3KvDdZE - Gqrx SDR software: https://www.gqrx.dk - We made a hot dog talk... with RF: youtube.com/watch?v=GgDxXDV4_hc - Workbench build video: youtube.com/watch?v=JV1Iv9bXkdISupport me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.com2nd Channel: youtube.com/@GeerlingEngineering3rd Channel: youtube.com/@Level2JeffContents:00:00 - Field Intensity Meter 2101:13 - Over 900!02:22 - How to take a measurement03:14 - Loop antennas, nulls, and SDR05:56 - External antenna testing08:16 - What about FM?09:16 - Why it costs thousands of dollars10:46 - Field Calibration13:33 - Is it still useful?14:46 - The importance of calibration15:50 - Justifying the cost... with a hot dog?
Building the ULTIMATE Electronics Workbench (with my Dad) Geerling Engineering 2024-05-10 | It's finally time to start setting up the new Geerling Engineering workbench!This video shows the setup process in the studio, and some of the first tools to go on it.Here are some of the things we mentioned in the video (some links are affiliate links): - UltraHD Workbench: amzn.to/44A93h5 - We Made a Hot Dog Talk... with RF: youtube.com/watch?v=GgDxXDV4_hc - ShelfLink Shelf Brackets: amzn.to/4b8Tnnl - DataVac Duster: amzn.to/3yaXfFX - ATEngeus AC Air Duster: amzn.to/4du6e5b - Scientific Americas ESD Mat: ebay.com/itm/272769915697 - Ken's Custom Crafts (he made the beautiful magnetic pickup tool!) facebook.com/profile.php?id=100090090706988 - QUANSHENG UV-K5 Radio: amzn.to/3QDAG2SSupport me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.comMain Channel: youtube.com/c/JeffGeerlingContents:00:00 - A workbench to honor a brother and uncle01:21 - The bench02:08 - Shelves with ShelfLinks05:35 - Cutting wood07:17 - Screwing in wood08:23 - Jeff goes solo10:59 - Setting up the bench11:25 - Dad's back!12:19 - Initializing the gear14:19 - The final touch15:54 - What are we missing?17:13 - Spurious emissions18:04 - Audience participation19:29 - The memorial workbench's many arms
This old tech could cost automakers BILLIONS Geerling Engineering 2024-05-08 | The Center for Automotive Research says it would cost the industry $3.8 billion dollars to solve interference problems in EVs to put AM radio in new cars.It's a wonder any EVs on the road today have AM radio tuners, then! But they don't seem to happy with new legislation, the AM Radio for Every Vehicle Act. We dive into this spat between the radio industry, automotive manufacturers, and the US government.Resources referenced in this video: - CAR estimated $3.8 Billion cost: radioworld.com/news-and-business/headlines/report-solving-analog-am-interference-in-evs-could-cost-billions - AM Radio for Every Vehicle Act: congress.gov/bill/118th-congress/senate-bill/1669 - Ars Technica coverage: arstechnica.com/cars/2024/05/am-radio-is-a-lifeline-lawmakers-say-tech-and-auto-industries-disagree - CTA EAS Test Survey results: https://cdn.cta.tech/cta/media/media/pdfs/cta-u-s-adult-emergency-alert-survey-2023.pdf - CTA's page against the AM radio mandate: https://www.cta.tech/Advocacy/Issues/AM-Radio - How the EAS Alert was Broadcast: youtube.com/watch?v=Rsp_N83_AzEThe AM radio we're using in the video is the Sony ICF-506, in case you were wondering. If you want one, you can use our affiliate link to pick one up! amzn.to/3UPWGdzSupport me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.com2nd Channel: youtube.com/@GeerlingEngineering3rd Channel: youtube.com/@Level2JeffContents:00:00 - 3.8 billion dollars01:30 - Asking a radio engineer07:56 - AM interference (spurious emissions)10:19 - What must be done?
This 100-year-old tech splits my voice in five Geerling Engineering 2024-04-17 | Geerling Engineering encounters a phasor at the 8-tower site of WSDZ-AM in Belleville, IL—formerly a Radio Disney station!Special thanks to Aaron Cox and Relevant Radio for letting us see this tower site!Resources mentioned in this video: - Antenna Theory Directivity: youtube.com/watch?v=ysNkjEnoRsU - How Does Starlink Satellite Internet Work? youtube.com/watch?v=qs2QcycggWU - We made a hot dog talk... with RF: youtube.com/watch?v=GgDxXDV4_hc - If I touch this tower, I die: youtube.com/watch?v=Aax-ehkRTnQSupport me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.com2nd Channel: youtube.com/c/GeerlingEngineeringContents:00:00 - It splits your voice?00:59 - Set Phasor to 'stun'05:26 - Day and night patterns07:33 - A 'dummy' load?10:38 - Signal routing and monitoring11:44 - Power and a massive grounding system13:59 - Strange parts17:14 - Designing an 8-tower array
We made a hot dog talk... with RF Geerling Engineering 2024-03-27 | DO NOT TRY THIS.Seriously.That out of the way, we devised a test to see just how dangerous the RF energy can be on an AM tower, if someone were to touch it while it was transmitting.This tower was operating under 10 kW. There are many AM towers broadcasting at _much_ higher power levels, so they are even _more_ dangerous. RF burns can kill, and there's a reason there are fences around these towers.Hopefully we have satiated your curiosity with this video.Support me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.com2nd Channel: youtube.com/c/GeerlingEngineering
They stole the WHOLE TOWER?! Geerling Engineering 2024-02-09 | The 200 foot radio tower for WJLX-AM in Alabama went missing.Is there more to this story? It seems like a lot of information is missing from early news reports—and just what is an FM translator, anyway? We'll cover all that in this video!More info and articles mentioned in the video: - WJLX 101.5 FM (1240 AM) website: wjlx1015.com - FCC AM Station Profile for WJLX: publicfiles.fcc.gov/am-profile/wjlx - Coverage from CNN: cnn.com/2024/02/08/us/stolen-transmitter-radio-tower-jasper-alabama/index.html - Discussion on Reddit: reddit.com/r/amateurradio/comments/1am3iza/alabama_station_in_disbelief_after_200foot_radio - Discussion on Radio Discussions: radiodiscussions.com/threads/wjlx-200-tower-reported-stolen.769741/#google_vignette - Video of AM transmitter off air (2013): youtube.com/watch?v=l1Srg9WEPzwSupport me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.comMain Channel: youtube.com/c/JeffGeerling
We found the strangest AI tech at CES 2024 Geerling Engineering 2024-01-22 | CES 2024 got weird. AI was everywhere, and the theme of the year was "add AI before any word and see what sticks". Here's our take from the show floor!Here are links to some of the things we mentioned: - Kohler's Smart Toilet: kohler.com/en/products/toilets/shop-toilets/numi-2-0-one-piece-elongated-smart-toilet-dual-flush-30754-pa?skuId=30754-PA-HB1 - AI Crap: waterplantir.com - Indy Autonomous Challenge: indyautonomouschallenge.com - Marvoto Fetus Camera M2: medicalexpo.com/prod/marvoto-technology/product-4577699-1069669.html - DolbomDream Huggy Vest: en.dolbomdream.com - Straffr Smart Fitness Band: en.straffr.com/en-us - Apex Storage X21: apexstoragedesign.com/apexstoragex21 - Cammy AI Highchair Cam: https://mastodon.social/@geerlingguy/111741678105702486 - Marvoto Ultrasound Z2 Pro Body Fat Scanner: fptmed.com/products/ultrasound-scanner-marvoto-z2-muscle-fat-scanner - eVTOL Flying Car: aeroht.com - AI Life: ailife.ai - Nomo smart care: nomosmartcare.com - Concha Labs OTC Hearing Aids: conchalabs.com - Stern Pinball: sternpinball.com - Proto Hologram: protohologram.com - iNixie Nixie Tubes: inixielab.com - Interview with Eben Upton at CES 2024: youtube.com/watch?v=Lky4FSfbc1ESpecial thanks to Arm for sponsoring our trip to CES 2024 (they did not sponsor this video, but they did pay for our travel for a video on the Jeff Geerling channel!).Support me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.com2nd Channel: youtube.com/c/GeerlingEngineering#CES2024 #AIContents:00:00 - AI hype train01:03 - Our top 304:16 - WIERDEST tech at CES07:29 - What tech's coming home in 2024?09:53 - More sightings at CES11:42 - Expensive tech
If I touch this tower, I die Geerling Engineering 2023-11-16 | KMOX-AM is a 50kW clear channel station in St. Louis, MO; take a tower of the tower and transmitter site!Special thanks to Audacy and KMOX-AM engineers for assisting us with this tower tour. Find KMOX online here: audacy.com/kmoxSupport me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.comMain Channel: youtube.com/c/GeerlingEngineeringContents:00:00 - 50,000 Watts00:23 - The tower is the antenna04:12 - The ATU (Antenna Tuning Unit)11:30 - Transmitter building14:03 - PEP Station (EMP-proof)15:28 - Transmitter building (and power distribution)20:50 - Giant tower lights, and the !@&(* button23:41 - Guy wires and a full-service restroom25:31 - Transmitter room37:43 - Backup studio and MREs39:34 - A century of tools in the workshop41:21 - Fried frogs and other tails
This radio tower fries frogs! Geerling Engineering 2023-10-31 | That's what 50kW'll do to you, be safe around RF!Full video of our tour of the KMOX-AM transmission site coming soon, stay tuned ;)Support me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.comMain Channel: youtube.com/c/JeffGeerling
An ACTUALLY smart air quality monitor (its open) Geerling Engineering 2023-10-25 | Special thanks to AirGradient for sending the AirGradient units to my Dad to install at his office!They provided us a special $10 off discount code — use code WG8N2JG at checkout! They also just released a new 'ONE' model, check all their devices out at: airgradient.comHere's my ESPHome configuration for Home Assistant integration: github.com/geerlingguy/airgradient-prometheus/blob/master/AirGradient-ESPHome/airgradient-diy.yamlSupport me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.com2nd Channel: youtube.com/c/GeerlingEngineeringContents:00:00 - Are you sure that's air your breathing?01:01 - AirGradient01:45 - How it works at the studios04:05 - Indoor and outdoor05:50 - How important is open?07:01 - In the basement07:53 - Wildfires and long meetings09:30 - Healthy changes
How the EAS alert was broadcast (its just a test) Geerling Engineering 2023-10-01 | DON'T PANIC! On October 4th, everyone in the US will get an alert.Why? And how is it delivered?We'll talk about the EAS (Emergency Alert System) for broadcast television and radio, and WEA (Wireless Emergency Alerts) for mobile devices. How they are propogated, and how and why the nationwide system is tested.Read more about the alert here: fema.gov/press-release/20230803/fema-and-fcc-plan-nationwide-emergency-alert-test-oct-4-2023Support me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.com2nd Channel: youtube.com/c/GeerlingEngineering#EAS #WEA #EmergencyContents:00:00 - October 400:45 - Why do we need nationwide tests?02:03 - How do they run the test?03:57 - Past tests and a MASSIVE failure04:59 - What is a successful test?06:31 - EAS Audio chain (local radio stations)09:40 - Jeff runs a test live, on-air!11:28 - Why so much testing?12:17 - Is EAS required for all stations?
Its ILLEGAL for my Dad to transmit! Geerling Engineering 2023-08-30 | Well, technically *now* he can. But when we started making this video, he couldn't.Learn more about amateur ('ham') radio: http://arrl.org/what-is-ham-radio73 to all you hams!Some of the things mentioned in this video: - ARRL Ham Radio License Manual: amzn.to/3qQMuFu - Baofeng UV-5R 5W two-way transceiver: amzn.to/45LU1Ei - Nagoya NA-771 15.6" whip antenna for UV-5R: amzn.to/45PBp6w - Yeasu FT-65R 5W two-way transceiver: amzn.to/3EfJcyqSupport me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.com2nd Channel: youtube.com/c/GeerlingEngineeringContents:00:00 - It's illegal to press this button00:55 - Amateur radio03:23 - What hams do04:27 - Getting licensed06:49 - Avoiding the FCC's ire09:01 - Finally, First Contact
Not just cars: Where does AM radio go from here? Geerling Engineering 2023-06-28 | Joe and Jeff Geerling discuss AM radio station ownership, emergency use, rural listeners, and more.Mentioned in this video: - Homemade radio (with a toilet paper tube): youtube.com/watch?v=_AI2Jixj5Bs - AM Radio Tower Power: youtube.com/watch?v=uo9nGzIzSPw - Hawaii PEP EMP-hardened Broadcast Studio: youtube.com/watch?v=nOKuDPaVxIg - XKCD Devotion to Duty: xkcd.com/705 - Grid Studio iPhone 4S display: gridstudio.cc/products/grid®4sSupport me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.com2nd Channel: youtube.com/c/GeerlingEngineering#AM #RadioContents:00:00 - Tesla, Ford, and AM radio in cars02:12 - Can emergency use save AM?05:48 - Rural use and wide area coverage06:52 - Ownership08:18 - Old people vs free airwaves09:19 - Local coverage10:25 - Rising costs, fried frogs12:12 - Trains are still here13:38 - NRSC and the future of AM radio15:00 - Father's Day gift time!
Dad helped me NOT burn down MrBeasts studio Geerling Engineering 2023-05-29 | It was crazy!We helped make Mr. Beast's 1-100 video: youtube.com/watch?v=FM7Z-Xq8Drc — and thanks to my Dad's testing, we caught a wiring issue that could've led to a fire!And check out the _whole_ story here: youtube.com/watch?v=wsV_C9cMf8ASupport me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.comContents:00:00 - Day 100:42 - What's up at Beast HQ01:31 - First we Feast(ables)01:58 - Validating the LED strips02:49 - McDonalds ... and a frozen tea03:19 - Day 204:41 - Shenanigans, and many miles of cabling05:37 - Down to the wire06:16 - Parting thoughts08:53 - The longest run (325 feet!)09:37 - Challenges ahead!
Control any computer, ANYWHERE — PiKVM v4 is here! Geerling Engineering 2023-05-10 | The PiKVM v4 is here, and we're going to replace the BliKVM on the studio PC to see how it works.Check out the PiKVM v4 Kickstarter: kickstarter.com/projects/mdevaev/pikvm-v4And our video on the BliKVM from last year: youtube.com/watch?v=3OPd7svT3bESupport me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.comMain Channel: youtube.com/c/JeffGeerling#RaspberryPi #PiKVMContents:00:00 - PiKVM v4 Intro00:36 - Teardown and internals02:10 - Getting ready for the new KVM04:16 - ATX front panel connections07:09 - Plugging it back in09:29 - First login and setting up displays12:33 - Changing the default password13:00 - Testing latency and video playback14:12 - It was (mostly) uneventful, which was good!
Whats inside the 2nd oldest TV tower in the West Geerling Engineering 2023-03-17 | KSDK TV has a storied history as the second oldest TV station west of the Mississippi River in the US.My Dad and I explore the history and the present for this 50,000 Watt broadcast TV tower—which was built in the 50s to spread KSDK's signal further West from the downtown area.Mentioned in this video: - Slo-Mo Guys 'How a TV works in slow motion': youtube.com/watch?v=3BJU2drrtCM - EEVblog 569 - Tour of an Analog TV Transmission Facility: youtube.com/watch?v=mR_wJkxKSXU - WFAA Original: Tower Climbers: youtube.com/watch?v=DtjaJjkmRg8#broadcast #engineering #tourSupport me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.comMain Channel: youtube.com/c/JeffGeerlingContents:00:00 - TV and... golf?00:48 - Transmitter room02:29 - Lots of packets04:13 - Transmitter up close05:37 - Feed lines, filters, and waveguides08:11 - 10 massive water cooling pumps09:41 - Remote room and old-school HD CRT11:02 - Power feed and filtering13:21 - Motorized multi-band satellite13:55 - Massive generator, multi-kV transformers14:43 - A fine weathered feed line15:42 - The red elevator16:38 - Low-power TV and an AM translator18:27 - Tx protection18:55 - If only these walls could talk (could they?)
Is AM radio dead? Tesla thinks so! Geerling Engineering 2023-01-26 | Is AM radio dying? If you ask Tesla, it's already dead. But what does that mean for the hundreds of local AM radio stations across the US?Mentioned in this video (some links are affiliate links): - Earlier video on the Retio retro nixie tube clock/radio: youtube.com/watch?v=VLWATdYT1u0 - Open Circuits book: amzn.to/3Db2ftQSupport me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.comMain Channel: youtube.com/c/JeffGeerlingContents:00:00 - Is AM Radio Dead?00:48 - Retio AM disaster01:47 - Why is AM so noisy?04:03 - Why keep AM alive?05:22 - Tearing down the Retio06:30 - A whole lotta hash08:06 - Content is king08:40 - Indoor solar?
1 MILLION watts—really? FM Supertower Part 2! Geerling Engineering 2022-12-07 | You had a LOT of questions about the 1 million watt FM tower, so we went back, and went even deeper!Support me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.comMain Channel: youtube.com/c/JeffGeerlingContents:00:00 - Megawatt, really? ERP Explained01:39 - Not all radiation is ionizing04:05 - Thousands of pounds of rigid coax05:25 - It didn't fry the drone!06:39 - Ice and other falling objects08:12 - A bubble of lightning protection09:01 - Incandescent? Why not LED?10:14 - 90-degree coax (not waveguides)12:00 - Little coax, BIG coax12:50 - A blue flame of RF13:35 - Why combine signals?14:23 - A desk fan is so cool15:09 - Inside a 30 kW FM Transmitter15:53 - HD Radio (US) vs DAB+ (EU)17:31 - Analog tubes? RF burns!18:18 - Reflected Kilowatts19:06 - We love hams!
Exploring a 1 MILLION Watt FM Tower Geerling Engineering 2022-11-11 | My Dad and I took a road trip to tour the 1 MW FM community tower in Crestwood, MO, serving the entire St. Louis metro area combining 10 FM radio signals into two antenna systems.Special thanks to the Audacy engineers who allowed us to take a peek at their (very clean!) transmitter rooms and equipment!Support me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.comMain Channel: youtube.com/c/JeffGeerling#Radio #Transmitter #EngineeringContents:00:00 - The Supertower01:52 - Grounding and Guy-Wires03:11 - Tower-scale cable management04:13 - Transmitter Room05:49 - 400A power and backup power07:09 - 50kW Dummy load, switching, and 30kW water cooling!09:16 - MARTI filter cans and cable loss10:37 - In the basement - from 30 to 300 kW12:47 - Giant coax with explosive arcing potential14:00 - Tower safety: RF lockout15:01 - Power, Aux services, Comms, and Lights16:41 - One tower, many stories
I interviewed a REAL Time Lord (in St. Louis!) Geerling Engineering 2022-10-07 | My Dad and I interviewed John Clark and Demetrios Matsakis at Masterclock. We talked about horology, timekeeping, and even linguistics!Support me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.comMain Channel: youtube.com/c/JeffGeerlingCheck out the Matsakis Minute over on @MasterclockTime's YouTube channel! youtube.com/watch?v=WUBOEwd7SGAContents:00:00 - Time is everything00:39 - Masterclock01:39 - John Clark and Masterclock's role in time05:26 - Factory tour06:40 - Interviewing a *real* Time Lord!11:00 - Linguistics and terminology
Raspberry Pi used in Biomedical Research Geerling Engineering 2022-08-10 | The Geerling Lab at the University of Iowa uses Raspberry Pis in cutting-edge medical research!We travelled North to talk to Joel Geerling, MD, PhD, and Fillan Grady, a neuroscience graduate student performing research on thermoregulation in mice. See what this means for humans, and how he and his Dad built two Raspberry Pi-powered enclosures!Support me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.comMain Channel: youtube.com/c/JeffGeerling#RaspberryPi #ResearchContents:00:00 - Road trip!00:23 - The parabrachial what?01:43 - Replication and open source02:19 - Human connection03:07 - Pi Thermal chamber04:36 - Pi Nose Poke chamber06:15 - Better than commercial products?08:16 - Fillan's Dad11:05 - Good science is reproducible
Dad tests the Retio (retro nixie tube clock!) Geerling Engineering 2022-06-18 | Thanks so much to the viewer who sent the Retio, it's definitely a conversation piece! It's a bit pricey, but for someone who loves nixie tubes, vintage electronics, radio, and fine woodworking... it's about as close to a perfect product as it gets!Here are links to all the other odds-and-ends we talked about in the video: - Retio: retio.co - Wicked Device Angular Clock Kit: jameco.com/z/ANGCLKV1-Wicked-Device-Angular-Clock-Kit-No-Soldering-Required-User-Programmable_2207831.html - Robot USB 2.0 Hub: ideastage.com/Robot-USB-20-Hub-383162251 - Non-contact voltage tester: amzn.to/3N2uk8N - Insignia HD Radio Portable Player NS-HD01: ebay.com/itm/175316195043 - RTL-SDR Blog V3 Software Defined Radio: amzn.to/3xu9ppa - Airspy SDR Software: airspy.com - SPARC HD Radio SHD-T750: amzn.to/3mYwGef - TWTADE SSR-25AA 25A AC Relay: amzn.to/3tJyknX - Drone - DJI Mavic Pro: amzn.to/3y20oW1Support me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.comMain Channel: youtube.com/c/JeffGeerling#FathersDay #Engineering #RetioContents:00:00 - Unboxing (Jeff)00:58 - Dad's Desk and SDR04:33 - Unboxing (Dad)05:44 - Testing Retio (clock and radio)07:52 - Testing Retio (bluetooth)10:24 - More knick knacks11:24 - Drone for Tower inspection12:28 - 5000 watts!13:06 - Conclusion
Pro NAS drives - worth the upgrade? Geerling Engineering 2022-04-22 | My Dad and I got an unexpected surprise after our last video: 64 terabytes of IronWolf Pro hard drives for the radio studio's NAS! Watch as we install them and compare the old 4 TB IronWolf drives. Are the Pro drives worth the price?Support me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.comMain Channel: youtube.com/c/JeffGeerling#NAS #Storage #ASUSTORMentioned in this video (some links are affiliate links): - IronWolf 4TB HDD: amzn.to/3EyyWAO - IronWolf Pro 16TB HDD: amzn.to/3rIHi3I - ASUSTOR Lockerstor 4RS: amzn.to/3rJp0iC - Unitek Powered SATA USB 3.0 Adapter: amzn.to/3v48yM2 - Blackmagic Disk Speed Test: apps.apple.com/us/app/blackmagic-disk-speed-test/id425264550?mt=12 - Level1Techs 'Hardware Raid is Dead' video: youtube.com/watch?v=l55GfAwa8RIContents:00:00 - 16 to 64 Terabytes00:54 - We'll do it live!02:27 - IronWolf Pro vs IronWolf05:03 - Change of plans: BTRFS06:30 - Change of plans: Back to Raid 1007:04 - File copy tests08:13 - SMB Multichannel08:53 - Feels pretty goodWriting, Cameras, and Recording: Jeff GeerlingEdited by: Stephanie Mueller
My Dads idea for #shorts ⚡️ Geerling Engineering 2022-04-07 | This is his idea of a good short...Support me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.comMain Channel: youtube.com/c/JeffGeerling
Extreme Studio Makeover: Storage Edition! Geerling Engineering 2022-03-12 | The radio station was down to a few gigabytes of free space. I asked my friends at ASUSTOR, and they saved the day with their rackmount NAS, along with some NAS hard drives from Seagate.Support me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.comMain Channel: youtube.com/c/JeffGeerling#ASUSTOR #NASMentioned in the video (some links are affiliate links): - ASUSTOR Lockerstor 4RS: amzn.to/3i1rqnz - Seagate Ironwolf NAS 4TB Hard Drives: amzn.to/3MIcPvk - Asustor Rack Rails (AS-60XR): amzn.to/3t3JHXR - Synology Rackstation RS820+: amzn.to/3tPonEH - Main channel video on 3-2-1 Backup Plan: youtube.com/watch?v=S0KZ5iXTkzgThe NAS and hard drives were provided to us by ASUSTOR and Seagate, respectively. No other form of compensation was given, nor were they given any control over the content of this video.Contents:00:00 - Storage intervention!01:00 - Lockerstor 4RS walkthrough02:28 - Delivery03:39 - Rack ears04:58 - Drive trays06:07 - Floppy drive - still alive!07:21 - Rack mounting08:02 - Sysadmin ASMR08:52 - Cabling09:49 - Power on10:46 - Network setup11:34 - RAID levels14:00 - Blinkenlights and Windows Update Woes15:13 - File copy test16:40 - Notifications and security18:06 - Summary
Choosing a UPS (Uninterruptible Power Supply) Geerling Engineering 2022-02-25 | Radio engineer Joe Geerling explains UPSes, why you need one, and how to choose one, based on decades of experience building and maintaining critical radio infrastructure.Support me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.comMain Channel: youtube.com/c/JeffGeerling#UPS #Backup #ITContents:00:00 - Introduction00:37 - Single workstation UPS01:27 - Rackmount UPS03:00 - Sizing a UPS03:23 - Network integration and monitoring04:21 - Getting clean power04:54 - Battery hot-swap06:36 - Battery chemistry and choice08:55 - Stories from the trenches09:47 - Why you need a UPS
This Raspberry Pi controls ANY PC (BliKVM) Geerling Engineering 2022-02-11 | The BliKVM is a PiKVM-compatible hardware kit that allows you to remote-control any PC, complete with ATX integration for system power control and status indication.The unit used in this video was provided to us by blicube. The BliKVM is available on Alibaba here: aliexpress.com/item/1005003262886521.htmlGuides referred to in this video: - How to flash eMMC Compute Modules: jeffgeerling.com/blog/2020/how-flash-raspberry-pi-os-compute-module-4-emmc-usbboot - Enable the external antenna connector on the CM4: jeffgeerling.com/blog/2022/enable-external-antenna-connector-on-raspberry-pi-compute-module-4Support me on Patreon: patreon.com/geerlingguySponsor me on GitHub: github.com/sponsors/geerlingguyMerch: redshirtjeff.com#RaspberryPi #PiKVM #BliKVMContents:00:00 - What's a KVM?01:46 - BliKVM Walkthrough08:27 - Assembly with CM409:54 - Installation into PC14:46 - Exploring PiKVM19:45 - More notes about BliKVM
