DIY Antennas, QRP, SDR & Ham Radio Projects from VU3DXR
This tag features technical guides on receiving long-distance FM and AM signals, SDR configurations for broadcast monitoring, and antenna optimizations for capturing distant stations. Perfect for hobbyists tracking atmospheric skips and signal propagation.
On the day Israel and the United States launched their first strikes against Iran, a mysterious shortwave radio station flickered to life on 7910 kHz. It hasn’t gone silent since. Broadcasting streams of numbers in Farsi — a Cold War spy radio technique that was thought to be fading from use — the signal has now been logged from Europe to North America. Radio amateurs have given it a name: V32
Discover the science behind Sporadic E propagation — the ionospheric phenomenon that lets FM radio signals travel 2,000+ km. Includes antenna tips, best seasons, monitoring tools, and DX listening tricks
Build a low-noise VHF RF preamplifier using the MAX2633 MMIC to improve receiver sensitivity and antenna signal strength on 144–148 MHz. Simple biasing and matching provide wideband gain for FM, repeater, and weak-signal reception.
The Faulkner FM Loop Antenna is a popular and highly effective design among FM radio enthusiasts and DXers worldwide. It provides excellent reception over the 87.5–108 MHz FM broadcast band and can be built easily using common materials. Despite its simple structure, it performs as well as many commercial indoor FM antennas
On the evening of 3 October 2025, radio listeners across Tamil Nadu were pleasantly surprised: broadcasts soon resumed on the Medium Wave frequency 1548 kHz using the high-power transmitter in Trincomalee, Sri Lanka — the same facility that formerly belonged to Deutsche Welle (DW). What We Know The test broadcast started at 8:00 PM IST […]