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)
  • https://re-ws.pl

RSS One-Forever Radio

  • Tune In to Fun: Planning the Perfect DJ Birthday Party
    Introduction Picture this: a dance floor bathed in pulsating lights, the beat of your favorite tunes reverberating through the room, and a crowd of friends […] The post Tune In to Fun: Planning the Perfect DJ Birthday Party appeared first on One-Forever Radio.
  • The difference between digital radio and internet radio
    Digital 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 podcasts
    Podcasts 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 podcasts
    Today, 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.

RSS Run my testbed experiment

  • Exploring the 5G RAN
    In this experiment, you will explore the 5G RAN by bringing up an end-to-end 5G network on a single server. You will see: how a 5G RAN can be split with the CU (centralized unit) handling SDAP, PDCP, and RRC layers, and the DU (distributed unit) handling RLC, MAC, PHY
  • Exploring the 5G core network
    In this experiment, you will explore the 5G core network by bringing up an end-to-end 5G network on a single server. You will see: how 5G core network functions can be deployed in containers the HTTP2/TCP interfaces between network functions the NGAP/SCTP interface between the 5G gNodeB and
  • Network layer security
    The exercises in this experiment will focus on security services offered at the network layer of the TCP/IP protocol stack. You will configure a network with a VPN tunnel, and then you will examine the extent to which you are protected from unauthorized eavesdroppers on network traffic, when you

RSS Blog – Hackaday

RSS ZephrSec – Adventures In Information Security

  • 2024 - The Year of Learning More and More
    2024 marks 13 years in security, 10 in offensive security, and 11 of blogging. This year has been about growth, learning, and sharing knowledge. From leadership insights to career reflections, this "year in review" celebrates technical contributions, personal achievements, and key milestones.
  • (Re)Building the Ultimate Homelab NUC Cluster - Part 2
    Welcome to part 2 of my NUC cluster; in the first part, I explained how to deploy a cluster using proxmox and walked through the hardware setup and the rest of the connectors. In this part, we'll dive into building your own Active Directory Lab environment and show
  • Adversarial SysAdmin - The Key to Effective Living off the Land
    Introducing Living off the Land Searches (LOLSearches), using advanced search operators with SharePoint and Explorer to help in Red Teams.

RSS fetch( ); decode( ); execute( );

  • Running Blink Example on Raspberry Pi Pico
    Today, I managed to find some time to try out a Raspberry Pi Pico module that had been awaiting my attention at the lab for some months. More details about this module can be found in their website's documentation. The following are the steps that I followed to get their default LED blink example running […]
  • Fundamentals of Radio Tomographic Imaging - Part 1
    Nodes vs Links Consider a wireless network consisting of \(K\) number of devices. If each and every device is communicating with each other, there will be a wireless link between each and every pair of nodes. The number of such unique two-way links is depicted as \(M\). The following equation describes relationship between \(M\) and […]
  • Observing I2C Communication using Logic Analyser
    Figure: 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 […]

RSS AMSAT-UK

  • Space Station Slow Scan TV Transmissions
    Just in time for the holidays and New Year, ARISS is planning an Slow Scan Television (SSTV) event from December 25 to January 5. Series 23 will consist in 12 pictures celebrating ARISS memories of 2024. Starting time of transmsissions … Continue reading →
  • Space Station Slow Scan TV Transmissions
    ARISS is planning a Slow Scan Television (SSTV) experiment from the International Space Station (ISS) on 145.800 MHz FM. It is scheduled to start on Monday, November 11, at 11:50 GMT and end Monday, November 18, at 14:10 GMT. There … Continue reading →
  • Telebridge ISS Contact with Essex School Students
    Amateur Radio on the International Space Station (ARISS) has received schedule confirmation for an ARISS radio contact between an astronaut aboard the International Space Station (ISS) and students at the Robert Drake Primary School located in Benfleet, Essex, UK. Update … Continue reading →

RSS Gough's Tech Zone

RSS Compass Security Blog

  • A Nifty Initial Access Payload
    Red Teaming engagements are “realistic” attack simulations designed to test the security posture of an organization and its Blue Team. This term is used in many different ways, so if you’re not sure where to draw the line, Michael Schneier’s latest blog post provides a good comparison of different types of assessment. Anyway, when doing […]
  • Harvesting GitLab Pipeline Secrets
    TLDR: Scan GitLab job logs for credentials using https://github.com/CompassSecurity/pipeleak Many organizations use (self-hosted) GitLab instances to manage their source code and a lot of infrastructure is managed in code (IaC), thus these configurations must be source-controlled as well, putting a lot of responsibility on the source code platform in use. Often deployments are automated using CI/CD […]
  • A Look Back: Insights from Our Managed Bug Bounty Program
    At Compass Security, we are proud to offer a fully managed bug bounty program tailored to the needs of both SMEs and larger enterprises. From scoping to payout, we manage every aspect of the process to ensure a seamless experience for our customers and valued hunters. In this blog post, we'll take a look at […]

RSS Nick Whyte

  • Ender 3 v2 Pen Plotter
    Last 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 Analysis
    Over 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.

RSS Baltic Lab

  • Restoring proxied visitor IPs from Cloudflare
    Proxy servers are a great tool. Be it for security, filtering, load balancing through multiple origin servers or origin shielding. Unfortunately, reverse proxy requests make it a bit more difficult to recover the original visitor IPs. This article shows how to securely restore visitor IPs through the use of the Apache module mod_remoteip.
  • Simple Microphone Preamplifier
    Electret microphones are cheap and extremely useful for DIY audio projects. One of their drawbacks, as with many microphones, is their very low voltage output level. The easy solution is to build a simple microphone preamplifer that boosts the signal to a much higher level.
  • DIY Spark Gap Transmitter
    This article plunges you into the mesmerrizing world of early radio technology through the assembly and analysis of a DIY spark gap transmitter. This project offers a practical insight into the fascinating dynamics of damped harmonic oscillators and explains charasteristics such the logarithmic decrement, decay rate, damping factor, q factor, and beyond. Prepare to spark […]

RSS owenduffy.net

  • Why do I keep saying “NOT for Amidon #43?”
    Amidon is a reseller, and sells ferrite products. They sell some products in #43 material. In recent years, they published data for their #43 material, the published characteristics are a copy of National Magnetics Group H material (though they changed the letterhead). Above is a side by side comparison of the NMG H material datasheet […]
  • A prototype 50:75 RF transformer
    The design is of a 50:75Ω autotransformer using a single Fair-rite 5943003801 (FT240-43) core. Note that this data is NOT for an Amidon #43 core. The winding is a total of 6t tapped at 5t, wound as two close wound layers. The prototype used a single conductor stripped from LAN cable. The winding configuration is […]
  • G5RV baluns – a comparison of two options – part 2
    This is a follow up article to G5RV baluns – a comparison of two options – part 1 and will make more sense if that article is read first. Louis Varney, G5RV, described his multiband HF antenna in two forms. The configuration pictured above using a hybrid of open wire matching section and low impedance […]