Podcasts about transceiver

Back in the old days, before USB, we had to use RS-232 to communicate with computers. One of our first designs was the ATmex (https://www.ladyada.net/techproj/Atmex/index.html), a microcontroller board with a built in bootloader! We used the MAX232 (https://www.digikey.com/en/products/detail/texas-instruments/MAX232DR/555684) to convert 5V serial to +-10V RS-232. These days, with USB-Serial converter chips like the FT232 or CP2102, you'll still see remnants of that past, such as DTR and RTS pins. When working with retro or industrial equipment, you may still find RS-232 DE-9 connectors. Let's take a look at some 3.3V-friendly transceivers, and find one that can do the full 5/3 pin-complete DE-9 connection set. See the chosen parts on DigiKey here https://www.digikey.com/short/218mnb89 Visit the Adafruit shop online - http://www.adafruit.com ----------------------------------------- LIVE CHAT IS HERE! http://adafru.it/discord Subscribe to Adafruit on YouTube: http://adafru.it/subscribe New tutorials on the Adafruit Learning System: http://learn.adafruit.com/ -----------------------------------------

This week we had the idea of making a breakout for IrDA data transfer: this is an older infrared bi-directional protocol that can mimics UART-like behavior with RX and TX running at 115.2Kbps. It could be useful for projects where you want to make a link between two boards but don't want the expect, complexity or overhead over RF. Simply transmit and receive whenever the two are within about a meter of distance. This used to be used for simple data transfer between computers, handhelds, or watches. They've phased out of popularity in the last couple decades... can we still get IrDA transceivers at DigiKey? Let's find out! See the chosen part on DigiKey https://www.digikey.com/short/jrn4wzqb Visit the Adafruit shop online - http://www.adafruit.com ----------------------------------------- LIVE CHAT IS HERE! http://adafru.it/discord Subscribe to Adafruit on YouTube: http://adafru.it/subscribe New tutorials on the Adafruit Learning System: http://learn.adafruit.com/ -----------------------------------------

This new pocket-sized CW transceiver from Elecraft if GREAT! It makes me want to learn CW at a faster rate than I already am! Today I take you through the menus of the radio and show everything that comes in the Edgewood Package, which is an add-on option for the KH-1 TransceiverSPONSOR: Save 20% off of all courses with coupon JASON20 at https://hamradioprep.com KH-1 Link - https://elecraft.com/products/kh1-transceiver

Jaman dulu ada banyak orang yang menghabiskan waktu berkomunikasi dengan nge-break. Ini adalah alat saya, "pesawat" 2meter-an. Istilah "kopdar" (copy darat) juga muncul di jaman itu. "Mojok" di frekuensi tertentu juga muncul di jaman ini.

Elecraft announced a new pocket-sized HF Transceiver this weekend at Pacificon, so now I wish I had gone to that show! *sadface*But it is already available on their website with details about the specs, accessories and capabilities of this new transceiver that they are calling the KH1. Let's take a look at it and see what we have in store!Link - https://elecraft.com/products/kh1-transceiver

On tonight's livestream I plan to install a Raspberry Pi4 board into an sBitx V2 that I picked up at Hamvention last month. This radio can be purchased fully assembled, or without a Pi, or as a kit. I bought the version without the Pi because I need a few extra Pis at home and wanted to build it on a Livestream. Join me tonight!Link to sBitx Website - https://www.hfsignals.com/index.php/sbitx-v2/

Here, I look at the Quansheng UV-K5 handheld transceiver, a low-cost handheld radio that's been getting a fair bit of attention lately. Specifically, I'm looking at how it might be a useful rig for blind operators. Be kind, it's my first Youtube video review with actual video, and excuse the audio levels as I just recorded on my iPhone on a tripod. Thanks to my wife Angie for manning (personing?) the camera, to Quansheng Electronics for providing radios to play with, and the @HamRadioDX 'and @TechMindsOfficial reviews for lots of great initial information and tips. Feel free to get in touch in the comments. And if you find this review interesting or informative, you can buy me a coffee (though please make mine hot chocolate. To buy one of these radios find Amazon link below. Amazon.com: Quansheng UV-K5 Dual Band Radio 5 Watt Output Portable Two-Way Radio with NOAA Weather Alert Walkie Talki FM (1 pc) : Electronics For a transcription of this review click dropbox link below. https://www.dropbox.com/s/oi8dhv1eyw5dniw/Overview%20of%20the%20Quansheng%20UV-K5%20Handheld%20Transceiver%EF%BC%9A%20From%20A%20Blind%20Ham%27s%20Perspective.txt?dl=1 Don't forget to visit www.blindhams.com

Foundations of Amateur Radio A is for Antenna, the eyes and ears of any amateur station. You'll spend eighty percent of your life attempting to get twenty percent improvement for any antenna you'll ever use. B is for Balun, bringing together the balanced and unbalanced parts of your antenna system. C is for Coax, the versatile conductor that snakes into your station, one roll at a time. D is for Dipole, the standard against which all antennas are measured, simple to make, simple to use and often first in the many antenna experiments you'll embark on in your amateur journey. E is for Electron, source of all things RF, the beginning, middle and end of electromagnetism, the reason you are an amateur. F is for Frequency, the higher you go, the faster it happens. G is for Gain, measured against a baseline, you'll throw increasing amounts of effort at getting more, one decibel at a time. H is for Hertz, Heinrich to his mother, the first person to transmit and receive controlled radio waves in November of 1886 proving that James Clerk Maxwell's theory of electromagnetism was correct. I is for Ionosphere, the complex and ever changing layers that surround Earth which led radio amateurs to discover HF propagation in 1923. J is for JOTA, the Jamboree On The Air where radio amateurs, guides and scouts come together on the third full weekend of October to share global communications. K is for Kerchunk, the sound caused by the local repeater that brings a smile to the operator and a grimace to the listener, created by pushing the talk button and not saying anything. L is for Logging, the only way you'll ever remember who you spoke to and when and the perfect excuse for bragging to your friends after you managed to collect contacts all over the globe. M is for Modulation, adding information to a radio signal by varying the amplitude, frequency, or phase. N is for Net, a social excuse for getting on air and making noise with your friends. O is for Oscillator, making repeating currents or voltages by non-mechanical means. P is for Prefix, the beginning part of an amateur callsign that identifies your country or region of origin. Q is for QRP, the best way to make just enough noise to make yourself heard, low power is the way to go! R is for Resonance, the point where a circuit responds strongly to a particular frequency and less to others, used every time you tune a radio or an antenna or both. S is for Shack, the space you call home, where you live your radio dream. The size of the corner of the kitchen table, the back-seat of your car or a purpose built structure with never enough space, no matter how much you try. T is for Transceiver, a single box that contains both a transmitter and receiver that share a common circuit. U is for UTC, Coordinated Universal Time, the only time zone that radio amateurs should use for any activity that goes beyond their suburb. V is for VFO, the Variable Frequency Oscillator that provides radio amateurs with frequency agility, the means to listen anywhere, any-time. W is for Waterfall, which displays radio signals across multiple frequencies at the same time. X is for XIT, Transmit Incremental Tuning, changing your transmitter frequency whilst listening on the same frequency, helpful when you're trying to break through a DX pile-up. Y is for Yagi, or Yagi-Uda antenna, the most popular directional antenna invented in 1926 by Shintaro Uda at the Tohoku Imperial University in Japan and popularised to the English speaking world by his boss Hidetsugu Yagi. Z is for Zulu, the last word in the phonetic alphabet that every amateur should know and use. 73 is for best regards. Saying goodbye is hard to do, this says so without fanfare and clears your station from the air. I'm Onno VK6FLAB

We've been hosting a live show weekly on Mondays at 5p for about an hour, and recording them all; here is the recording from January 16th, 2023.In addition to Bryan Cantrill and Adam Leventhal, we were joined by Nathanael Huffman, Cliff Biffle, Rick Altherr, Matt Keeter, Eric Aasen, and Dan Cross.Check out the show notes on github to browse the images. (00:00) - Intro (11:42) - Gemini (18:33) - Root of Trust (RoT) carrier (20:53) - Power (23:41) - Trimmed Power (28:11) - SPI MUX (29:38) - SPI MUX rework (33:14) - Gimletlet (41:10) - Gimletlet NIC (46:28) - DIMMlet (56:39) - Gimletlet mk2 (58:27) - Adapters (59:54) - Adapters zoom (01:01:47) - Ignition (FPGA) (01:04:40) - Gimletlet peripherals (01:06:12) - Gimletlet with management switch (1/2) (01:07:22) - Gimletlet with management switch (2/2) (01:09:21) - Kludge.2 (K.2) (01:16:23) - Donglet (01:25:49) - RoT carrier carrier (01:26:17) - Tranceiver load tester (01:29:06) - Load slammer for Tofino 2 (01:31:30) - Power (improved) (01:32:08) - Part Toaster (01:33:28) - K.2r2 Images of each proto board: @11:42 Gemini @18:33 Root of Trust (RoT) carrier @20:53 Power @23:41 Trimmed Power @28:11 SPI MUX @29:38 SPI MUX rework @33:14 Gimletlet @41:10 Gimletlet NIC @46:28 DIMMlet @56:39 Gimletlet mk2 @58:27 Adapter zoom @59:54 Adapters zoom @1:01:47 Ignition (FPGA) @1:04:40 Gimletlet peripherals @1:06:12 Gimletlet with management switch (1/2) @1:07:22 Gimletlet with management switch (2/2) @1:09:21 Kludge.2 (K.2) @1:16:23 Donglet @1:25:49 RoT carrier carrier @1:26:17 Transceiver load tester @1:29:06 Load Slammer for Tofino 2 @1:31:30 Power (improved) @1:32:08 Part Toaster @1:33:28 K.2r2 If we got something wrong or missed something, please file a PR! Our next show will likely be on Monday at 5p Pacific Time on our Discord server; stay tuned to our Mastodon feeds for details, or subscribe to this calendar. We'd love to have you join us, as we always love to hear from new speakers!

Join us tonight on the weekly livestream as we walk through the firmware update for my Xiegu X6100 HF QRP Transceiver.Link: http://hr2.li/6dkx4Save $15 off of $65 at Radioddity with this coupon: https://radioddity.refr.cc/jasonjohnston

The tranciever seems to be set up, but Lum figures that Abner isn't holding up his end of the bargain and not turning the generator fast enough. Maybe Lum hasn't…

The package from Pearl has turned out to be a jumple of metal, and wires, and Abner is having trouble in figuring it out. He was so excited to unpack…

Talking briefly about GMRS. Lately I have had a lot of interest in my GMRS videos and requests to talk more about it.

  Vidcast:  https://youtu.be/lrdYz9jKwF8   The CPSC and Black Diamond announce the recall of Pieps Pro BT and Powder BT Avalanche Transceivers.  These transceivers may not switch from the SEND to the SEARCH mode preventing the device from locating a skier trapped in an avalanche and leading to a severe injury or death.  About 76,300 of these units were sold in the US and about 21,300 were sold in Canada at Liberty Mountain, REI, and other specialty outdoor stores nationwide and online at backcountry.com.  Do not trust these devices until you have done a safety check to verify that the devices can switch into SEARCH mode from SEND mode.  If your device cannot consistently do so, contact Black Diamond at 1-866-306-0865 to receive a prepaid mailer to return your device for a free repair or replacement.   https://www.cpsc.gov/Recalls/2022/Black-Diamond-Equipment-Recalls-PIEPS-and-Black-Diamond-Avalanche-Transceivers-Due-to-Risk-of-Loss-of-Emergency-Communications   #pieps #powder #avalanche #transceiver #search #injury #recall  

As a Boy Scout, young Leslie is abducted and must engineer his escape.

Xiegu reveals a new SDR QRP radio that they are calling the G106. Let's take a look at some of the advertised features of this new model.Radioddity Link: https://www.radioddity.com/products/xiegu-g106⭕Save $15 off at Radioddity with this coupon: https://radioddity.refr.cc/jasonjohnston

  Vidcast:  https://youtu.be/4OijUAAL_BA   The CPSC and Backcountry Access now recall Backcountry Access Tracker4 Avalanche Transceivers.  The toggle switch that permits the unit to search easily separates from the transceiver preventing the unit from locating a skier in an avalanche.  About 9,000 units were sold in the US and about 450 were sold in Canada at  REI, Evo, Cripple Creek Backcountry and other specialty stores nationwide and online at amazon.com, backcountry.com, snowbigdeal.com, jagaloon.com and specialty websites.  Stop depending on this faulty transceiver and contact Backcountry Access at 1-800-670-8735 or via email at bcatracker4@backcountryaccess.com to receive a prepaid mailer to return our unit for a free replacement transceiver.    https://www.cpsc.gov/Recalls/2022/Elevate-Outdoor-Collective-Recalls-Backcountry-Access-Avalanche-Transceivers-Due-to-Risk-of-Loss-of-Emergency-Communications   #backcountry #transceiver #switch #search #recall  

Members of our community share a review of the Yaesu FT-4XR. The purpose of the 30 Days feature is to provide an honest review system in which members of our community are randomly chosen to test ham radio or ham radio adjacent products.WebsiteContactDiscordFacebookYouTubeSupport the show (https://www.buymeacoffee.com/christiancudnik)

This week we're continuing on last week's RS-232 FeatherWing and looking at maybe making a multi-use design. We've also had requests for an RS-485 FeatherWing and perhaps we can design something that could be used for either. We've used a 'MAX232'-like before, but for RS-485 we'll need a different kind of chip, one that does a differential transmission. Let's see what's available and how we would wire it up! See on Digi-Key here! https://www.digikey.com/short/pd3945ww See other episodes of The Desk of Ladyada in the playlist here https://www.youtube.com/playlist?list=PLjF7R1fz_OOXUtaFu7-_D1UCugC8OecKv and other Great Searches in the playlist here. https://www.youtube.com/playlist?list=PLjF7R1fz_OOVHqJN28IbXLBj1FKCxw-xD Visit the Adafruit shop online - http://www.adafruit.com ----------------------------------------- LIVE CHAT IS HERE! http://adafru.it/discord Adafruit on Instagram: https://www.instagram.com/adafruit Subscribe to Adafruit on YouTube: http://adafru.it/subscribe New tutorials on the Adafruit Learning System: http://learn.adafruit.com/

Best QRP HF Ham Radio Transceiver for 2022 - the radios on this list are my choices for the best HF QRP Radio of 2022 with SSB capabilities. See the complete list here - https://www.livefromthehamshack.tv/2022/03/18/best-qrp-hf-radio-for-2022/Radioddity Coupon - https://radioddity.refr.cc/jasonjohnstonCW-only Radio Guide - https://youtu.be/jRoDZ8bODb0

Today I take a look at the new-ish uSDX QRP HF Transceiver which I purchased from Banggood. It is a Chinese radio for a low cost, but packed with features. Watch the video and let me know your thoughts, and for more info, check the link below.Purchase link: https://www.banggood.com/custlink/KvmhNay2wk

Tonight I welcome @Temporarily Offline Ham Radio and @HAM RADIO DUDE onto the channel to talk about this new transceiver from Xiegu, the X6100. What short-comings have we found with the radio? What do we like about it? What improvements are we hoping to see. Bring your questions!Purchase link: http://hr2.li/6dkx4Save $15 off at Radioddity: http://hr2.li/hl9gi

The Elecraft K4 is the latest and greatest HF Ham Radio Transceiver from Elecraft and today I get to sit down in front of one and go through some menus, plus show all of the buttons, ports and connections, and awesome touchscreen!Visit Elecraft's website: https://elecraft.com

Paul Mower, VA6MPM, treks across the Canadian Rockies, often for days at a time.  Amateur radio connects Paul to the outside world when he is far beyond his cellular telephone coverage.  Paul enjoys working Summits on the Air from some of the most remote outposts in the world.  VA6MPM is my QSO Today.

Nick McNutt Returns to the LPP!   The post #189 Nick McNutt – The Aftermath of Transceiver Saga appeared first on Low Pressure Podcast.

Celebrating 16 years of AmateurLogic.TV. Peter, VK3PB drops in for and update from downunder. George shows some of his favorite tips and projects from the last few years. Tommy demonstrates a neat battery capacity tester. Emile discovers new Cheap Tricks with Echolink. Announcing the winner of our 16th Anniversary contest! Cliff Boand, WA0JTW will receive an Icom IC-705 Transceiver, AH-705 Auto Tuner, LC-192 Backpack, MFJ-4230MV Power Supply, MFJ-2012 OCF Antenna, and RG-8X coax.

Celebrating 16 years of AmateurLogic.TV. Peter, VK3PB drops in for and update from downunder. George shows some of his favorite tips and projects from the last few years. Tommy demonstrates a neat battery capacity tester. Emile discovers new Cheap Tricks with Echolink. Announcing the winner of our 16th Anniversary contest! Cliff Boand, WA0JTW will receive an Icom IC-705 Transceiver, AH-705 Auto Tuner, LC-192 Backpack, MFJ-4230MV Power Supply, MFJ-2012 OCF Antenna, and RG-8X coax.

Celebrating 16 years of AmateurLogic.TV. Peter, VK3PB drops in for and update from downunder. George shows some of his favorite tips and projects from the last few years. Tommy demonstrates a neat battery capacity tester. Emile discovers new Cheap Tricks with Echolink. Announcing the winner of our 16th Anniversary contest! Cliff Boand, WA0JTW will receive an Icom IC-705 Transceiver, AH-705 Auto Tuner, LC-192 Backpack, MFJ-4230MV Power Supply, MFJ-2012 OCF Antenna, and RG-8X coax.

Unglaubliche 40 Folgen voller interessanter Leere stehen auf der Habenseite. Und wie immer, wenn es etwas Rundes zu feiern gibt (nein, nicht unsere Alkohol-Gesichter), verwandeln sich die drei Transmitter ins Transceiver und beantworten munter sämtliche wichtigen Fragen der Welt wie z.B. “Wie lange kann Basti Frank Tonmann tragen, während Thomas ihn kitzelt?” Die Erkenntnisse die bei diesen Fragerunden entstehen, sind teilweise recht erkenntnisreich und wer sich bilden, anstatt sich auf einen Mathetest vorbereiten will, sollte auch heut Mitternacht wieder eifrig reinlinsen. Owls before the sows! Alle Infos und Rabatte zu unseren Werbepartnern unter https://linktr.ee/EulenvordieSaeue

Could this week's EYE ON NPI help you with communicating with far away I2C sensors and devices? Yes, indeed it CAN! This week we're featuring the Analog Devices LT3960 (https://www.digikey.com/en/product-highlight/a/analog-devices/lt3960-high-speed-transceiver), a handy chip that will let you take advantage of the noise-durability of CAN with the universality of I2C. The LT3960 is a high-speed transceiver which creates the functional equivalent of a single-master I2C bus in the CAN physical layer and is powered from a single wide-ranging input voltage. Using two integrated CAN transceivers, the LT3960 creates a differential proxy for each of the single-ended I2C clock and data signals which is capable of traversing harsh or noisy environments across two twisted pairs. Please note! The LT3960 is not a I2C to CAN bus converter/adapter. It isn't like your CAN devices will appear on an I2C bus or vice versa. It's just a physical-layer converter: basically it lets you use your existing I2C controllers and peripherals but without the restrictive single-ended transmission layer: It should be noted that while the LT3960 uses the CAN physical layer to conduct bidirectional I2C data, the CANSCL and CANSDA buses created by the LT3960 are not traditional CAN buses carrying traditional CAN data. As such, the CANSCL and CANSDA buses between LT3960 devices cannot be shared with standard CAN transceivers in a multidrop configuration. However, you can (ha!) have multiple I2C sensors on the end of the long cable, either by having multiple sensors connected to one LT3960 or multiple LT3960's tied to the I2CAN bus along the route. A nice touch is the separate VIN pin, connected to a high-voltage LDO that can drop 60V down to 3.3V so you could also pass a high voltage power signal down the cable that could be then regulated at the end, locally, to provide power to the transceiver and sensor. This could do a great job for automotive/robotics/industrial/agricultural sensor systems with long distances or electrically-noisy environments, without having to go to wireless or having 'smart' nodes. OK so why not just use CAN bus straight-up, instead of this converter? Well, I2C is the vastly more popular protocol for a variety of sensors and devices - it's supported by every microcontroller and microcomputer we've ever seen. If you wanted to use CAN, you'd have to connect an existing I2C sensor to a microcontroller/computer with CAN and then write and support the converter firmware. But most low cost microcontrollers don't have native CAN - it's considered an advanced peripheral, so now you have to go with a pricey chip like the STM32F405 (https://www.digikey.com/en/products/detail/adafruit-industries-llc/4382/10673113) or you could try tacking a CAN converter chip (https://www.digikey.com/en/products/detail/microchip-technology/MCP2515T-I-SO/593681) onto your existing nodes, also not cheap and now adds another failure risk. So whether you're using an Arduino UNO, STM32F405 or Raspberry Pi main controller or data logger, you can take advantage of the existing I2C controller you've already got. Then use this low cost chip on either side of your sensor network to create a durable network without the added complexity of having I2C-to-CAN nodes. So for example, if you have a greenhouse with a plethora of SHT30-based soil sensors (https://www.digikey.com/en/products/detail/adafruit-industries-llc/4099/10230011), each on I2C, you can stick this chip on the end of each sensor and voila, the data can be run all the way to the end of the building (and with that 60V LDO, your CAT-5 cable (https://www.digikey.com/en/products/detail/amphenol-cables-on-demand/MP-5ERJ45UNNB-003/6052293) can provide power too). Sprinkle a few of these over your design and sweep away your EMI and stray capacitance problems with no change in firmware. This NPI just dropped, so sign up at digikey.com to be notified the moment the LT3960's (https://www.digikey.com/short/9wp0j1f5) are in stock!

In this episode, Martin (M1MRB) is joined by Leslie Butterfield G0CIB, Dan Romanchik KB6NU and Edmund Spicer M0MNG to discuss the latest Amateur / Ham Radio news. Colin (M6BOY) rounds up the news in brief and in the episode we feature Parks on the Air by Bill Barnes (WC3B) and XIEGU G90 SDR Transceiver Review by Ed Durrant (DD5LP). ICQ AMATEUR/HAM RADIO PODCAST DONORS We would like to thank Scott Wright, K0MD, and our monthly and annual subscription donors for keeping the podcast advert free. To donate, please visit - http://www.icqpodcast.com/donate Fly Me to the Moon WIA Seeks Review of Amateur Radio Exam System International Space Station to be in Cross-Band Repeater Mode for Field Day Aluminium-Ion Battery Development IARU Workshop Future of Amateur Radio - Strengths, Weaknesses, Opportunities and Threats RSGB EMF Update June 2021 FMH Portable Operations Challenge 2021, Parallel Regional or Local Group Competitions

In this demo, I discuss and demo the BTA-2 Bluetooth transmitter and Receiver to allow you to wirelessly connect to the P4. Note - as with connecting a TRRS cable, mic 3 (channel 3) needs to be in the most right position for the switch, and the BTA-2 plugs in to both the 2.5mm and 3.mm jacks on the side of the P$.

就在三天前，2021年3月23日，當地時間大約7:40 (5:40 UTC)，台灣的長榮海運公司的貨櫃輪「長賜輪」(EVER GIVEN)，在「蘇伊士運河」的航道上意外擱淺，正好將整個通道阻塞。因此，「蘇伊士運河」完全停止服務，任何輪船都無法穿越，一直到影片製作的現在。我從「維基百科」、「Google地圖」的觀察，我發現，「蘇伊士運河」本身存在著「單點故障、全體故障」的問題，也就是Single Point of Failure, SPOF。因為開鑿運河本身，就是一個極為昂貴的工程，我的重點不是在指出「蘇伊士運河」的設計規劃有問題。我只是藉由這個例子，來說明任何網路系統的設計，如果存在著「單點故障、全體故障」的服務停止缺陷，雖然發生的機會很小，只要機會不是零，我們就必須預先規劃好，如何降低發生的機率；或是當這個狀況發生的時候，所產生的代價，我們是否可以承受；還有，我們必須花費多久時間，才能修復回正常服務的狀態。「蘇伊士運河」事件的摘要我先將視野，站在「蘇伊士運河」業主本身。我從報導得知，「蘇伊士運河」在2020年一整年的過路費收入，大約是56 億美元 (5.6 Billion USD)。我假設運河本身365日每天都營運，平均每一天的收入，大約是一千五百萬美元 (15 Million USD)，這個數字大約是超過新台幣四億元。因此每停止服務一天，過路費收入的損失就是一千五百萬美元。到目前為止我的觀察，「蘇伊士運河」業主本身能夠做的手段，還沒有看到明顯的效果，包括使用拖船、挖開擱淺岸邊的砂土。目前已經尋求外部救援公司的協助。如果最後真的需要外部救援公司才能解決，我的估計，光是移動外部救援公司的機具到現場，可能就要好幾個星期，因此，這個阻塞問題需要更多的日子，才能夠解決。光是過路費的收入，就是一筆好大好大的數字。我將視野，拉回到網路系統。萬一我們的網路規劃，還存在著類似的「單點故障、全體故障」的SPOF問題，我提出下面幾個思考的切入點，來避免我的工作網路遇到，跟進行中的「蘇伊士運河」事故一樣糟糕的結果。停止服務事件，發生的機率有多大？雖然我沒有具體的統計數字，但是，經驗上告訴我，纜線、路由器、交換器、防火牆，任何可單獨安裝的硬體單位，一年內完全沒有任何故障的機率，幾乎是零。就算完全沒有故障，也只能算是運氣好。我必須預期，一條纜線，一個路由器，一個交換器，一個防火牆，就在未來的一年內，一定會產生故障的事件。在這個情境下，來進行我的網路規劃。因此即使發生單一硬體故障，也不會造成服務停止的冗餘設計(Redundancy)，非常重要。例如，多重冗餘路徑、多重冗餘硬體的加入，都能夠減少停止服務的機率。即使最後因為不敷成本不採用冗餘設計，這些冗餘設計的選項，我也必須列入考慮清單中。未來如果條件改變，我可以快速知道，我還有哪一些備案可以選擇。停止服務事件，發生後的代價有多大？地點不同，代價也不相同。如果某個網路連線，只服務一個時間要求不高的使用者，例如，單一普通員工的座位電腦、小群組印表機，代價也許不明顯。但是如果是主幹道上面的網路，停止服務後，損失一定很可觀。如果可能，將預期的損失用金錢來估算，這樣會比較有感覺，同時，這個數字也能夠幫助我評估，我能夠投入的合理預算，有多少。停止服務事件，發生的時候，要花多久時間修復？在網路系統距離不遠處，準備一些多餘的可能故障的備用品，例如網路線、光纖收發器(Transceiver)，甚至是交換器，都可以減少停止服務的時間。尋求外部公司的協助，也是可行的選項。例如資訊系統另外付費的「保證四小時內到場維護」等級的硬體服務。結論前面三個切入點的問題，每個企業內的系統的情境、取捨，可能都不一樣。重點是，我都必須隨時準備好，我要如何去回答。One more thing…雖然我的視角只是網路系統，事實上，前面全部的檢視，也適用於任何的資訊系統。回到「蘇伊士運河」。誰能事先想得到，竟然會這麼剛好，擱淺意外，發生在「蘇伊士運河」單向、單通道的航道段，而且主角是總重量超過二十萬噸的、世界最大型的貨櫃船。如果能回到過去，改成發生在雙通道航道段，或者是主角不是如此笨重的輪船，一切就不會演變成整個「蘇伊士運河」完全阻塞。只要機率不是零，我都必須假設，這種事故真的會發生。我不能只靠運氣好。我是洪李吉。我的網站是「Cisco學習資訊分享」。我們下次見！

Hey I’m Aaron Henriques, a British night rated aeroplane private pilot, doing my professional flight training and learning for my helicopter PPL. You can find me on Instagram @AaronHenray. I’m also a british business person and here to share an honest account of my flying journey with you!  I record this on my iPhone and there will be very little (or no) editing, so be prepared for the odd slip-up or swear! If you’re easily offended… find another podcast. Thanks! In This Episode... I give an update on general aviation flying in the UK during coronavirus COVID-19 lockdown and why I changed to Austro control for the ATPL professional pilot exams. I talk about the Sky Echo 2 by uAvioni purchased from Transair Flight Equipment, the eligibility rules and timelines for you to claim your rebate. Also about how the Sky Echo 2 can help to keep you safer as a general aviation pilot. What are your thoughts on Sky Echo 2? Have you flown with it yet? Let me know on my Instagram post. Want to know more?Follow me on Instagram @AaronHenray and see my latest aviation videos and pictures. Do you have a story to share? Something you’d like to hear on this podcast? Why not get in touch! Message me on Instagram @AaronHenrayDISCLAIMER: (Because I have to really...)I'm only sharing my own personal experiences and beliefs which may not always be 100% accurate but I will try to make it as accurate as possible. You should seek advice from professional sources yourself and not try to sue me or anything if it doesn’t work out for you in the same way as it has for me or any guests on the podcast!

This essay is part of Home Icons, a series about the cultural and material histories of domestic objects.  The allure of the once subversive technology of radio transmission for its seemingly inherently revolutionary qualities in fiction and in real life, falls short when set against today's revolution. It, like many coalitional mediating technologies now, is secondary to and serves the always-evolving work of care and resourcefulness.  Read more essays on living with technology at reallifemag.com and follow us on Twitter @_reallifemag.

Icom IC-705 Unboxing and Menu Demo with the new HF/VHF/UHF All Mode Transceiver.Purchase Here: https://tinyurl.com/y3r7fkam

Icom IC-705 Unboxing and Menu Demo with the new HF/VHF/UHF All Mode Transceiver.Purchase Here: https://tinyurl.com/y3r7fkam

The Great Search is a new series of videos focused on searching the Digi-Key catalog to narrow down to the parts you want to buy. This week: Today we were working on an all-in-one CAN bus Feather. CAN bus is a protocol with a hardware signalling layer that is specified for 5V logic, and there's a 120 ohm termination resistor. This means we will need at least 50mA for the signalling control. Let's find a DC/DC converter that will get us a nice clean 5V with minimal cost and complexity on Digi-Key! Search for yourself on digikey.com at https://www.digikey.com/short/z2rt3m ----------------------------------------- Visit the Adafruit shop online - http://www.adafruit.com ----------------------------------------- LIVE CHAT IS HERE! http://adafru.it/discord Adafruit on Instagram: https://www.instagram.com/adafruit Subscribe to Adafruit on YouTube: http://adafru.it/subscribe New tutorials on the Adafruit Learning System: http://learn.adafruit.com/

SunSDR2 DX HF Ham Radio Transceiver - today I setup a new HF radio from SunSDR, the SunSDR2DX 100 watt Transceiver running ExpertSDR software. A special thanks to the nice folks at Gigaparts for allowing me to review this radio!Purchase link: https://www.gigaparts.com/sunsdr2-dx-transceiver.html

SunSDR2 DX HF Ham Radio Transceiver - today I setup a new HF radio from SunSDR, the SunSDR2DX 100 watt Transceiver running ExpertSDR software. A special thanks to the nice folks at Gigaparts for allowing me to review this radio!Purchase link: https://www.gigaparts.com/sunsdr2-dx-transceiver.html

Gordon West, “Gordo”WB6NOA, may be one of ham radio’s most well known ambassadors and promoters of our amateur radio hobby today.  Through his books and courses over the years, Gordo, has licensed thousands of individuals to become amateur radio operators. Gordo tells me that this is the first time that he has told his ham radio story from the beginning in this episode of QSO Today.

Transformer Director Victoria Reis interviews DC community radio founders/leaders Amanda Huron (Radio CPR), Kymone Freeman (We Act Radio), and Joshua Gamma (DC Library Punk Archive) about the role of community radio as voice of the people in tandem with Transceiver Radio project at Transformer.

Jack Worth, WA0QZK, is a retired pastor with over 50 years of amateur radio operating experience who likes to QSO on CW from the Warsaw Telegraph Office.  Jack collects and restores antique Morse code telegraph keys and bugs and uses them to work the World and ragchew on QRP and a modified G5RV antenna. WA0QZK is my QSO Today.

In this episode, Martin M1MRB is joined by Chris Howard M0TCH, Martin Rothwell M0SGL and Frank Howell K4FMH to discuss the latest Amateur / Ham Radio news. Colin M6BOY rounds up the news in brief and this episode’s feature is a review of the UHF/VHF Weekender Transceiver Kit by Martin M1MRB. ICQ AMATEUR/HAM RADIO PODCAST DONORS We would like to thank our monthly and annual subscription donors for keeping the podcast advert free. To donate, please visit - http://www.icqpodcast.com/donate Radar makes 5 MHz Band 'Useless' Neil G0WPO - SOTA Mountain Goat Free Foundation Training Books for Australian Amateur Radio Students Radio Ham Takes on Department of Justice ITU Strengthening Emergency Telecommunications in the Americas GQRP Club Founder the Rev. George Dobbs, G3RJV, SK State of the Hobby Survey 2019 BYLARA Launches New Bulletin Publication RSGB AGM Online Voting

In this episode we discuss the WF200 Wi-Fi Transceiver with Nick Dutton, Wi-Fi Product Lead at Silicon Labs. Nick answers several questions to help engineers understand the benefit of designing with the WF200. What is the WF200? How does the WF200 simplify adding Wi-Fi to an external controller or processor? What does Silicon Labs provide customers to quickly get their products to market? What are the low power benefits of the WF200? How does Antenna Diversity help the WF200?

A flexible, powerful, and affordable digital transceiver for the Raspberry Pi.Jonathan Bradenburg, KF5IDY, shares with us his findings for using the Raspberry Pi as a digital transceiver, with a custom hat that he builds himself, and the various applications that he used it for.There were lots of Raspberry Pi type projects presented at the TAPR DCC this year and I was privileged to record all of them. I hope that you enjoy this presentation, along with the other ones posted on this channel, as much as I did.Be sure to subscribe for more Ham Radio video: https://goo.gl/6hjh2JTAPR DCC Website: https://www.tapr.org/dcc.htmlCheckout my website: https://livefromthehamshack.tv

A flexible, powerful, and affordable digital transceiver for the Raspberry Pi.Jonathan Bradenburg, KF5IDY, shares with us his findings for using the Raspberry Pi as a digital transceiver, with a custom hat that he builds himself, and the various applications that he used it for.There were lots of Raspberry Pi type projects presented at the TAPR DCC this year and I was privileged to record all of them. I hope that you enjoy this presentation, along with the other ones posted on this channel, as much as I did.Be sure to subscribe for more Ham Radio video: https://goo.gl/6hjh2JTAPR DCC Website: https://www.tapr.org/dcc.htmlCheckout my website: https://livefromthehamshack.tv

Dr. Ulrich Rohde, N1UL, is a pioneer in RF oscillator and receiver design. Over the last 40 years N1UL has authored over 60 articles for QST and QEX magazines, in addition to books, academic papers, and articles. Dr. Rohde has made significant scientific contributions to his family business, the Munich based Rohde and Schwarz test equipment company, and to amateur radio manufacturers including Icom. Ulrich, N1UL tells his ham radio story in this QSO Today.