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 Radio for Everyone

  • FM Audio Transmitters - Portables and Car Hands-Free
    FM Audio Transmitters - Portables and Car Hands-FreeI'm using FM transmitters for years, both portables and vehicle versions, and pretty much used the majority of types on the market, so here's how they work and which ones I recommend.How FM transmitters work?Output audio from a device via FM transmission standard: you set a frequency on […]
  • Review: Nooelec Rattlesnake 3-antenna kit
    Three antennas with magnetic mount and coax for $16:Review and observations are based on over half a year's use, summary: order from manufacturer, Amazon USA, or eBay right away. Rattlesnake kit is the best value aftermarket antenna package I ever came across. Period.Direct competitor on price ($15 on Amazon) is rtl-sdr.com's antenna kit, separate review here.First impressionsHeavy, feels good when opening the envelope:M5: Screw standard referring to […]
  • Portable Bluetooth Audio Signal Receivers
    Receive an audio signal up to 50 feet / 15 meters - best replacement for wires, also work as hands-free in a vehicle. Hands-on guide and five units tested and compared: cheap from China, for Hi-Fi, and midrange and expensive hands-free. Regardless of locale and prices, these four types cover most flavors on the market.What […]
  • Maximum USB cable length
    Question often comes up, Answer: 27 feet / 9 meters with RTL-SDR dongles:For testing, I tried four separate RTL-SDR dongles in image above: rtl-sdr.com v3, Nooelec Mini 2, Nooelec E4000 SMArtee and regular Nooelec SMArt.USB connector cable is crucial, as mentioned in a previous post detailing stuff I'm happy with, blue 5 feet / 1.5 m […]
  • RTL-SDR Dongles Image Gallery
    Studio Photos of over 20 RTL-SDR dongles on the market:More than 200 high-resolutions PCB, case and comparison images by clicking here.

RSS Run my experiment on GENI

  • Multicast routing with PIM
    In this experiment, we will see how multicast routing protocols build a distribution tree between one or more multicast receivers and sources. It should take about 60-90 minutes to run this experiment. To reproduce this experiment on GENI, you will need an account on the GENI Portal, and you will
  • A peek into Internet routing
    In this experiment, we will see how traffic traverses the Internet across different autonomous systems. We'll use traceroute to sample some Internet paths. Then, we'll try to find clues about the routers along the path from the router hostnames. We'll also examine how traffic moves from one autonomous system to
  • Experimental evaluation of the impact of Tor latency on web browsing
    Tor is an anonymity network that is used by privacy-conscious users around the world to browse the web anonymously. However, routing web traffic through the Tor network also adds extra latency to each packet. In this experiment, we will set up a private Tor network, with complete control over network

RSS Crazy Danish Hacker

RSS Blog – Hackaday

RSS ZeroSec – Adventures In Information Security

  • Old but Gold - Attack and Defend the Sys Admins
    Older techniques used in a sysadmin space, weaponised for red teaming and how to detect them from a blue team perspective.
  • Paving The Way to DA - Complete Post (Pt 1,2 & 3)
    As this series is a three part and dives into how to get domain admin in a windows estate using different techniques I found it useful to link them altogether in one flowing post, yes it is a straight pull of the other posts into one continuous post but it
  • Reviving and Refactoring DNS Enum
    I have been using Lepus for a number of years as it is one of the better subdomain enumeration tools. I integrated some of the lessons learned from DNS Queue and added additional functionality to a project that had not been updated in over 2 years. So here is my

RSS Genesys Guru Blog

  • Genesys Integration on The Wire (IOTW)
    Following on from a previous post on Genesys Management 2.0 here I’ve been doing some additional work on integrating Genesys environments with Elasticsearch. The result is what I call Genesys Integration on The Wire (IOTW).     Integration on The Wire (IOTW) is a technology which enables system level integration based on a “zero touch” […]
  • Genesys Management 2.0
    Hi – I’m back! Unfortunately, due to client confidentiality I’ve not been able to blog about Genesys work projects for a few years. Let’s change that .. This post is about something I have been looking at for several years in the form of a shelved project which gets events from Genesys components via the […]
  • 2016 Xmas Light show using Raspberry Pi Controller
    Enjoy!  

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

  • Enabling Hibernation in Ubuntu 20.04 LTS using a Swap File
    Enabling of the hibernation option on Ubuntu 20.04 LTS didn't work in the way I used to do. So, I had to explore further and do it slightly differently. This blog post records those things I did to get hibernation option working.1. First of all, create a swap file using the following commands.sudo fallocate -l […]
  • Encrypting Files Using GnuPG
    This post shows how to use GnuPG to encrypt and decrypt files on a Linux environment.1. If you haven't created your GnuPG key pair yet, you can use the following commands to create them and view their details.Create a pair of GnuPG keys using the following command.gpg --gen-keyThe keys and their relevant information are stored […]
  • Sending Secure Emails with OpenPGP
    Use of encryption in our electronic communication is essential to protect our security and privacy. Here's how we can use OpenPGP standard to send and receive emails securly. While there are many software tools to get this done, I prefer this way.1. Create a pair of GNU Pritty Good Privacy (PGP) keys using the following […]

RSS AMSAT-UK

  • Radio amateur G3YJO on BBC Radio 4
    Radio amateur Professor Sir Martin Sweeting G3YJO, was the guest on the Radio 4 show The Life Scientific that was broadcast on Tuesday, April 20. Martin Sweeting G3YJO pioneered the original SmallSats revolutions with the UOSAT-1 and UOSAT-2 spacecraft that … Continue reading →
  • Spring issue of OSCAR News now available
    E-members of AMSAT-UK can now download the March 2021 edition of OSCAR News, issue 233, 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 →
  • Contests on QO-100 allowed in time for Yuri Gagarin contest
    On April 4, AMSAT-DL announced the opening of the QO-100 NB satellite transponder to general contest operation in the upper mixed-mode range. This weekend (April 10-11) will see the Yuri Gagarin contest. The contest area on the QO-100 geostationary satellite … Continue reading →

RSS Gough's Tech Zone

RSS Compass Security Blog

  • Straightforward Mobile Forensics
    We put more and more sensitive data on mobile devices. For many private conversations we use mobile applications, such as WhatsApp. This smooth access to the data and the Internet provides multiple benefits in our lives. On the other side, new attack vectors are created. Phishing messages do not need to be delivered in an […]
  • SAML Raider Release 1.4.0
    SAML Raider 1.4.0 is out which contains several new features like UI changes, new text editor, raw mode, XSW match/replace, parameter name definition and attack templates for XXE and XSLT attacks.
  • The Good Old DNS Rebinding
    A post on how to trick browsers to work as a gateway to internal web servers and IoT devices, the concepts behind and how to easily exploit DNS rebinding using the Singularity of Origin framework.

RSS 0xicf

  • ClearEnergy ransomware can destroy process automation logics in critical infrastructure, SCADA and industrial control systems.
    Schneider Electric, Allen-Bradley, General Electric (GE) and more vendors are vulnerable to ClearEnergy ransomware. Researchers at CRITIFENCE® Critical Infrastructure and SCADA/ICS Cyber Threats Research Group have demonstrated this week a new proof of concept ransomware attack aiming to erase (clear) the ladder logic diagram in Programmable Logic Controllers (PLCs). The ransomware a.k.a ClearEnergy affects a massive […]
  • Flaws in Samsung’s ‘Smart’ Home Let Hackers Unlock Doors and Set Off Fire Alarms
      A smoke detector that sends you a text alert when your house is on fire seems like a good idea. An internet-connected door lock with a PIN that can be programmed from your smartphone sounds convenient, too. But when a piece of malware can trigger that fire alarm at four in the morning or […]
  • Waze | Another way to track your moves
    Millions of drivers use Waze, a Google-owned navigation app, to find the best, fastest route from point A to point B. And according to a new study, all of those people run the risk of having their movements tracked by hackers. Researchers at the University of California-Santa Barbara recently discovered a Waze vulnerability that allowed […]

RSS Nick Whyte

  • 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.
  • 100 Warm Tunas 2017 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 2017 would look like. Along the way we encountered a bug in the collection process, however data was backfilled and showed that I […]

RSS owenduffy.net

  • Logging temperature meter (ltm) v1 – prototype VY NTC calibration
    Logging temperature meter (ltm) is a ESP8266 based temperature measurement and logging device. ECT NTC in VY Holden Commodore Snap-On have produced a table of temperature/resistance values for the ECT sensor in the VY 6 cyl Commodore. From that, I can calculate the Steinhart-Hart coefficients and their standard error. Additionally, B equation coefficients are calculated […]
  • N6THN’s novel balun – flux leakage
    N6THN’s novel balun presented measurement of the Insertion VSWR of the subject balun, and N6THN’s novel balun – an explanation gave explanation that included mention of flux leakage as a contributor to the quite high inductance per unit length of the transmission line formed by the two windings. A correspondent suggested that with a ferrite […]
  • A handy 230VAC 15A inline power meter based on an inexpensive module from eBay
    This article describes a simple and inexpensive inline power meter for use as a test instrument. CNC routing The box cutouts were done on a CNC router, but they could be done with hand tools. Above, calcs of feeds and speeds for the CNC router. The box is actually ABS, but cutting speed for Polycarbonate […]