Liên kết hữu ích
- MARTIN - G8JNJ - ECLECTIC AETHER - Adventures with Amateur Radio
- Owen Duffy VK2OMD (ex VK1OD) - Good practical information relating to Electronics, Antennas, Feedlines, Baluns & just about everything else
- Steve G3TXQ - Home of the Broadband Hexbeam and 1:1 Balun common mode impedance charts
- Tom W8JI - Lots of practical antenna information and theoretical analysis
- Dan N3OX - Lots of antenna practical construction information (especially verticals) and theoretical analysis
- Adam AB4OJ/VA7OJ - Excellent information relating to Icom Radios and associated items
- Alan K0BG - Everything you will ever need to know about mobile operation and compact antennas
- Phil AD5X - Lots of very interesting articles and construction projects
- Ian GM3SEK - Lots of practical design info. Especially these pages on cost effective common mode choke design
- Jim KY9C - Loads of design and measurement information relating to common mode chokes
- Chuck W1HIS - More notes on ferrite common mode chokes. Showing what you need to do to reduce EMI problems
- L.B Cebik W4ML (SK) - The best resource for antenna design and modelling (free but you need to create a login account)
- The difference between digital radio and internet radioDigital radio is not the same as Internet radio. Online radio uses a data stream received through Internet access via a computer, personal devices, or Internet-enabled radio. The post The difference between digital radio and internet radio appeared first on One-Forever Radio.
- What’s the Difference Between a Podcast and an Internet Radio Show?Two of my most frequently asked questions are: "What are podcasts?" and "What's the difference between a podcast and an internet radio show? The post What’s the Difference Between a Podcast and an Internet Radio Show? appeared first on One-Forever Radio.
- How to listen to podcastsPodcasts are available on devices that are connected to the Internet and can play audio. These are smartphones and tablets, laptops and desktop computers. The post How to listen to podcasts appeared first on One-Forever Radio.
- Should businesses create podcastsToday, podcasts are among the most effective marketing tools. Taking into account available experience, it is possible to point out 5 main factors which indicate the prospects of creation The post Should businesses create podcasts appeared first on One-Forever Radio.
- Podcasts: who needs them and whyIn the rhythm of modern life, many people have switched to audiobooks instead of paper books. Against the backdrop of universal multitasking, podcasts are especially popular. The post Podcasts: who needs them and why appeared first on One-Forever Radio.
Run my testbed experiment
- Secure networked applicationsThe exercises in this experiment will focus on the confidentiality of network services - to what extent are services that offer remote login, file transfer, or web access, protected from disclosure to unauthorized individuals? In particular, we will consider confidentiality with respect to malicious users who might be eavesdropping on
- Some of the Internet may be heading towards BBR dominance: an experimental studyBackground Low latency TCP congestion control (CC) is a key enabler of delay-sensitive applications such as cloud gaming, remote driving, and virtual/augmented reality(VR/AR). In recent years, TCP BBR has emerged as a popular choice for low latency CC, with it already having widespread adoption. However, a critical
- Emulating multipath wireless links on CloudLab and FABRICThis experiment emulates a multipath wireless scenario by "playing back" wireless network link traces that were collected in the same time and place. It should take about 60-120 minutes to run this experiment. You can run this experiment on CloudLab or on FABRIC! Refer to the testbed-specific prerequisites listed below.
Blog – Hackaday
- NASA Team Sets New Space-to-Ground Laser Communication Record[NASA] and a team of partners has demonstrated a space-to-ground laser communication system operating at a record breaking 200 gigabit per second (Gbps) data rate. The TeraByte InfraRed Delivery (TBIRD) …read more
- The PDP8 That Never Was: Hollow State Logic[Outer World Apps] noted that there was no PDP-8/V made by DEC — a variant that used vacuum tubes. So he’s decided to make one using about 320 6J6A tubes. …read more
- Recreating an Analog TV Test PatternWhile most countries have switched to digital broadcasting, and most broadcasts themselves have programming on 24/7 now, it’s hard to remember the ancient times of analog broadcasts that would eventually …read more
ZephrSec – Adventures In Information Security
- WebSockets are a Pain - A Journey in Learning and LeveragingBefore I dive in and show examples of implementations that worked, it is worth doing a quick explainer on what WebSockets are, how they work, what a typical request handshake looks like, and how to troubleshoot when things don't go the way you want them to.
- Ticket Fraud Scammers - An InvestigationIf you're reading this, it's a blog post that's not my regular write-up but more of an investigation and a hypothesis on the anatomy of a scam. I also put it together to raise awareness for those who read my blog and who might not be overtly technical-focused.
- LTR102 - Published Finally!Hello Everyone, This a short blog post to announce I have finally published my second book after several years of work. I have spent nearly five writing it; like my first one, it follows the path of getting into and progressing in the industry, while LTR101 was focused on bug
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- Observing I2C Communication using Logic AnalyserFigure: Connectivity between a master (controller) and slaves (target). (source: https://en.wikipedia.org/wiki/I²C)Inter-integrated circuit (I2C) protocol is an advanced protocol, that eliminates many weaknesses in the UART and SPI protocols to provide communication between ICs using minimum number of wires. I2C consists of just two wires interconnecting one or many master devices with one or many slave […]
- Observing SPI Communication using Logic AnalyserIn this article, let's try to understand how the serial peripheral interface (SPI) protocol works, which can be used to transfer data between digital electronics components. It is useful to connect various digital sensors and other peripheral modules with a microcontroller unit. As the name implies, it is a serial communication protocol. However, unlike UART, […]
- Observing UART Communication using Logic AnalyserThe Universal Asynchronous Receiver / Transmitter (UART) is an embedded communication protocol, which can be used to transfer data between two electronic devices. As the name implies, this protocol is asynchronous, meaning that the sender and receiver does not have to be time synchronised through a dedicated clock signal. Instead, the signal itself is transferring […]
- Summer 2023 OSCAR News now availableE-members of AMSAT-UK can now download the Summer 2023 edition of OSCAR News, issue 241, here. The paper edition edition will be sent to postal members and should arrive in the next 2-3 weeks. In this issue: • From the … Continue reading →
- DX Adventure Team will activate 4U100QO on QO-100 from the United Nations – Vienna International Center.DX-Adventure is proud to announce a partnership with the United Nations Amateur Radio Contest DX Club (ARCDXC). During 18 | 19 | May 20th we have the scoop to make the very first QO-100 connections from the United Nations – … Continue reading →
- WRC23: 23cm (1240-1300 MHz) Amateur/RNSS CoexistenceITU-R WRC-23 Agenda Item 9.1b: Measures to be applied in the frequency band 1240-1300 MHz to ensure the protection of the radionavigation-satellite service (RNSS) in accordance with Resolution-774. This presentation on 23cm Amateur/RNSS Coexistence was given by the IARU Region … Continue reading →
Gough's Tech Zone
- Quick Review: Kingston NV2 1TB NVMe SSD (@PCIe3.0x4)This SSD was originally reviewed with the Orico PWM2-G2/PWDM2-G2 USB3.2 Gen2 M.2 NVMe/NVMe+SATA Enclosure, but seeing as I now have an M.2 to PCIe adapter, I might as well install it into my main desktop as a tertiary SSD in … Continue reading →
- Review, Tested: Minthouz Multi-Color LED Strip Light Kit (MT-L001)As part of the deal in the previous post, I received a 10m multi-colour LED strip light set for “free”. While I’m not usually a fan of RGB LEDs on everything and I find the whole idea of such accent … Continue reading →
- Review: Minthouz 65W PD GaN Fast Charger (MT-G6502)Thanks to my devices, I’m slowly being dragged into the modern world of USB-C and PD charging, which means that my older USB-A only chargers are starting to become too slow and too wimpy for some of my devices. Thanks … Continue reading →
Compass Security Blog
- Compiling a Mimikatz Module for Dumping Citrix CredzSometimes, the good old credential dumping techniques just won't work. This is the story of how a bad actor could dump credentials on a fully-patched, monitored and hardened workstation.
- Compass Incident Handling and Forensics Number CrunchingThe anonymous data on our cases allows us to answer the question "What is a typical DFIR case at Compass Security?" and we conclude its the analysis, containment, eradication and recovery of one or a few devices in a Windows domain which is probably no surprise 🙂
- Level-up your Detection GameRed Teaming exercises are getting popular with the growth of security operations centers. These attack simulations aim to help companies improve their defenses and train the blue team. But solid foundations are necessary to get the most of such an exercise.
- Reblogging Gets a RefreshReblogging is a way to show appreciation for another creator’s work while also providing your own audience with a valuable piece of news, work of art, or thought-provoking opinion. We recently made a few significant improvements to the experience of reblogging to make it more customizable for you while also …
- Introducing Jetpack AI Assistant in WordPress.comYour rocketship to more powerful content creation.
- New to Newsletter — Earn With Paid SubscriptionsWhether starting a paid newsletter from scratch or taking an existing one up a notch, there's no better time than now.
- Ender 3 v2 Pen PlotterLast year I purchased myself an Ender 3 V2 3D Printer. It was a logical purchase, to compliment my home automation hobby, allowing me to design and print custom enclosures for miscellaneous ESPHome and Zigbee nodes. It turns out having a CoreXY 3D printer allows you to do more than just 3D printing if you’re […]
- 100 Warm Tunas 2018 Prediction AnalysisOver the space of 6 weeks, 100 Warm Tunas collected a large sum of data and chugged away at it to make some predictions about what the Hottest 100 of 2018 would look like. In summary, We collected 6,234 entries (13.6% decrease since 2017 🔻). We tallied 58,463 votes across these entries (12.9% decrease since […]
- 100 Warm Tunas has a new home!100 Warm Tunas has found a new home this year! This year’s results, along with the past 2 years can now be found at 100warmtunas.com. The existing domain (100-warm-tunas.nickwhyte.com) will simply perform a 301 permanent redirect to the new domain, so all existing inbound links should be unaffected.
- Program uBlox GPS-module timepulse frequency (dynamically) with an ArduinoThe uBlox GPS-modules are capable of providing various reference clock signals through the TIMEPULSE pin. By default, this pin outputs a 1 pulse-per-second (PPS) signal. For an upcoming project, a GPS disciplined oscillator (GPSDO), this output had to be adjusted to 100 kHz. Instead of using the manufactuer’s software, u-center, this task is supposed to […]
- JFET-based infinite impedance detector for AM-demodulationThe so-called “infinite impedance detector” is a circuit that was commonly used in the old days of vacuum tubes. Since vacuum tubes can be somewhat considered to be heated JFETs, it is evident that such a circuit can also be built using a more modern, silicon-based approach. This article covers my first experiments with a […]
- Total Harmonic Distortion (THD) from dBcHow to calculate THD from dBc This article supplements to my article titled THD Measurement with an Oscilloscope and FFT, which appeared in Elektormagazine . Here I will explain how the formula to calculate THD-F from relative power values (in dBc) was derrived from the standard voltage-ratio formula. A more in-depth explanation of the entire […]
- Determination of transmission line characteristic impedance from impedance measurements – eighth wave methodFor a lossless line, the reactance looking into short section and open circuit terminated line sections is and . Noting that when so when the line section is π/4ᶜ or 45° or λ/8, then . We can use this property to estimate Z0 of an unknown practical low loss transmission line by finding the frequency where […]
- Determination of transmission line characteristic impedance from impedance measurements #2Determination of transmission line characteristic impedance from impedance measurements discussed issues with the short circuit and open circuit terminations used with measurement of Zoc and Zsc for calculation of characteristic impedance of a line section. Included was a model of the effect of small delay offset in one of the termination parts on an example […]
- Relationship between radiation efficiency and minimum VSWR for common short helically loaded verticalsThis article explores the relationship between radiation efficiency and minimum VSWR for common short helically loaded verticals. For clarity, . Such antennas are often advertised with a “minimum VSWR” or “VSWR at resonance” figure, but rarely show gain figures. One might wryly make the observation that that is how one might sell dummy loads rather […]