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.
Radios
- 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.
Test Gear
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.
Design Tools