I am a radio amateur, Ashhar Farhan. My callsign is VU2ESE. I like to experiment with radio electronics. These some of the radios, test gear and experiments that I have built. All the content of this website is freely reproducible for any purpose as long as you mention that the original source code/circuit diagram/text was from this website.
- BITX: An easy to build 6 watts SSB transceiver for 14MHz
BITX is very actively discussed by builders and kitters on https://groups.io/g/bitx20. Join it to get help, meet and discuss with other BITX builders.
- A Simple Dual-band Transceiver
This a well performing, simple two band transceiver. It was the first transceiver that I designed inspired by the S7C superhet.
- To see other Radios that I have built. Visit the Radios page.
What you can’t measure, you can’t know. Measuring is the most important part of our hobby and it is often the most overlooked. I have build a fair number of simple test gear. Here is an incomplete list:
- Specan: A Spectrum analyzer
This is a relatively easy to build spectrum analyzer based on Terry White/Wes Hayward’s QST analyzer. It as difficult as building a simple SSB transceiver. Very much worth the time.
- Two Tone Generator A two tone generator is an essential test gear made with just four transistors that helps you evaluate your amplifiers, mixers, receivers for distortion. Distortion makes all the difference between a pleasant receiver and a horrible sounding one, between a clean transmitter and bad, splattering one on air.
A Feedback Amplifier Calculator