Comparing NanoVNA with the Keysight Fieldfox N9952A
Vector network analysers (VNA) come in all sort of price ranges. Most of them are out of reach for a typical hobbyist. Very few VNAs are available to be bought by someone like you...
Category: Electronics
NanoVNA – A short review
Do you build RF circuits? Have you built any antennas? If the answer to any of the two questions is YES, then you know how valuable having a VNA (Vector Network Analyzer) is. Just...
Using LimeSDR mini as a RF source
In one of the previous posts we saw how we could transmit DATV using LimeSDR mini. This time we are going to use our LimeSDR mini as a RF source in our home lab....
Manual VCO selection for a faster locking PLL
PLL chips such as the ADF43xx, MAX287x and so on come with an integrated VCO. The frequency range on these PLL chips can extend all the way from few tens of MegaHertz to several...
A simple voice detector circuit
Voice detector can find it’s use in voice-activated circuits. For example, triggering a transmitter or enabling a speech processor and so on. At the end of this blog post, we will look at one...
RF Pulse generation with RF switch
Remember the previous post where we generated PWM? We are going to use the PWM output from the TivaC microcontroller and drive an RF switch. I will be using the Minicircuits HSWA2-63DR+ SP2T switch...
Generating PWM on Tiva C connected launchpad (TM4C1294)
Texas Instrument’s Tiva C connected launchpad is a really powerful Cortex M4 microcontroller board. The possibilities with this chip are endless. In this post, we will be generating PWM output on one of the...
Getting VHF station up and running
Days after clearing the ASOC examination, I finally got an official callsign – VU3XEN. The callsign would be useless if I have no means of communication. This post is going to be really short...
Home brewing a simple antenna analyzer – Part 1
A primary tasks of an antenna analyzer is determining how good of a match an antenna has with the transmitter. One of the ways of determining that is by looking at the reflected power from...
DRA818V VHF band transceiver – Part 1
Necessity to stay connected with others is growing by the day. In cases when mobile network is out of reach and a message needs to be relayed or received, ham radio can prove to...
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