Author Archive

S-A-A-2 NanoVNA V2

A Vector Network Analyzer (VNA) is an extremely useful tool for radio hobbyists as it allows you to measure and tune antennas and filters, as well as measure cables. The most affordable such instrument for some time has been NanoVNA. NanoVNA V2 Vector Network Analyzer can be viewed as next updated version of NanoVNA. The

Old Usenet posts on-line again

Decades before Twitter threads, Reddit forums, or Facebook groups, there was Usenet: an early-internet, pre-Web discussion system where one could start and join conversations much like today’s message boards. It was launched in 1980. On Usenet, people talked about everything. And there were many interesting discussions and technical details posted. Old 80s Usenet content published

Legacy systems issues

The IT systems that governments and businesses depend on are often decades old and prone to failure. Why do they cost trillions to maintain but are so hard to modernize? Water treatment plants, telephone exchanges, power grids, and air traffic control are just a few of the systems controlled by antiquated code. Does everybody agree

DT830 multimeters

Saw in Facebook discussion Another meter is fried again today!!! I have six meters blown in 2 years, while reading high voltage AC. I guess I will find a better alternative for such reading. Is there a way of fixing spoilt meters!?. We are talking about this kind of DT830 type multimeters: My answer:

Friday Fun: Turing Tests

The Turing Test is a test designed to test a machine’s ability to think. A human submits questions to the machine, and it answers (usually in written form). If the person cannot distinguish between it, and a person answering, the machine is said to be intelligent. Turing himself never claimed this would test whether the

ETSI IoT security standard

Security standard for consumer IoT emerges. ETSI approved and published its standard ETSI EN 303 645 V2.1.1 (2020-06) – Cyber Security for Consumer Internet of Things: Baseline Requirements in June 2020. This puts it on track for final approval and release later this year. The standard specifies the high-level security and data protection provisions that

NanoVNA RF Demo kit

Got RF test kit to play with NanoVNA from Banggood: RF Demo Kit NanoVNA RF Tester Board Filter Attenuator for NanoVNA-F Vector Network Anaylzer. I selected this RF Demo Kit NanoVNA over another quite similar RF demo kit because this kit was cheaper and looked better. This RF Demo Kit is specially designed for RF

Cyber Security News October 2020

This posting is here to collect cyber security news October 2020. I post links to security vulnerability news with short descriptions to comments section of this article. If you are interested in cyber security trends, read my Cyber security trends 2020 posting. You are also free to post related links to comments.

Windows 10 fixes for 100% disk usage

My computer feels slow even though I have enoug memory and powerful CPU. Got 100% disk usage in Windows 10? So your computer is hanging and freezing because of it. You want to fix this vexing Windows issue. The following article gives several potential fixes! It promises to solve the issue with 15 tricks list.