Author: Johnson Francis

I had posted about measuring length of coax using NanoVNA with the transform function. In that method, we use the velocity factor of the coax in percentage. If

Fed up with the S9 or more noise in my radio most of the time, I was thinking of buying battery and testing whether working on pure DC

Coax length is measured using the transform function and the S11 port of the NanoVNA. What we get is either the length of the cable or the distance

PIC16F1938 is the microcontroller used in this antenna tuner. It is an 8 bit CMOS microcontroller with clock speed of 32 MHz. CMOS stands for Complementary Metal-Oxide-Semiconductor. A

NanoVNA is a very hand and relatively inexpensive Vector Network Analyzer which can be used to optimise the performance of the antenna. Here we will see how the

Fram2 spacecraft has been launched into orbit and has four astronauts. LB9NJ/KD3AID is among them and talked to university students of TU Berlin today from orbit. The event

OSL stands for Open-Short-Load. OSL calibration is used in NanoVNA and other vector network analyzers (VNAs). That gives a reference for the test port of the VNA. Open

Earlier I had referred to ATmega328 as the ‘Heart of Arduino Nano’. On second thought I think I have to call it the ‘Brain of Arduino Nano’ which

Thought of checking the activity on the important amateur radio bands at 3.45 pm local time using PSK Reporter. PSK reporter has plenty of amateur radio stations globally,

Bootloader is also known as boot manager and bootstrap loader. Bootloader is a small program responsible for booting a computer. In case of Arduino microcontroller, bootloader is a