Boost Your DX: The Ultimate 30m/40m Dual-Band Delta Loop antenna

Boost Your DX: The Ultimate 30m/40m Dual-Band Delta Loop antenna: Discover how to build a high-gain Dual-Band Delta Loop antenna for 30m and 40m. Learn the exact loop lengths, 30m tuning secrets, and the RG-11 matching trick

Ultimate DIY Tri-Band 80M, 40M and 30M Trapped Delta Loop Antenna

Ultimate DIY Tri-Band 80M, 40M and 30M Trapped Delta Loop Antenna: Build a triband delta loop antenna for 80M, 40M & 30M. This trapped delta loop antenna guide covers traps, matching section & construction details

W5GI Multiband Collinear Antenna: A Proven HF All-Band Wire Antenna

W5GI Multiband Collinear Antenna: A Proven HF All-Band Wire Antenna: W5GI multiband collinear antenna explained. Covers 80–6m with tuner, better than G5RV, construction details, coax sections, and real-world performance.

Receive DRM with HDSDR and DREAM Decoder Using RTL-SDR

Receive DRM with HDSDR and DREAM Decoder Using RTL-SDR: Turn HDSDR into a DRM receiver. Setup audio routing, tuning, and DREAM decoder for reliable digital radio reception.Receive DRM With HDSDR And DREAM Decoder

Build a High-Precision DIY RF Current Sniffer

Build a High-Precision DIY RF Current Sniffer: Stop RF interference in its tracks. Learn how to build two versions of the RF Current Sniffer to detect common-mode current and optimize your ham radio antenna.

DIY Double Dipole Antenna for 50 MHz Band

DIY Double Dipole Antenna for 50 MHz Band: Double Dipole Antenna

Beginner’s Guide to HF SSTV Setup with SSB Transceivers

Beginner’s Guide to HF SSTV Setup with SSB Transceivers: Master SSTV setup with uBITX/sBITX transceivers. Audio interfacing, PTT control, software config, troubleshooting. MMSSTV, QSSTV guides included.

How to Receive Stunning Weather Images from Meteor-M2 Satellites

How to Receive Stunning Weather Images from Meteor-M2 Satellites: Learn to capture stunning weather images from Meteor-M2 satellites with this step-by-step LRPT setup guide using RTL-SDR and SatDump.

DIY Active Antenna: Boost Weak HF/VHF Signals

DIY Active Antenna: Boost Weak HF/VHF Signals: DIY Active Antenna for superior HF and VHF reception! This DIY electronics project amplifies weak signals to lift hard-to-hear broadcasts out of the noise

Simple Incandescent Lamp Flasher Circuit Using 7555 Timer

Simple Incandescent Lamp Flasher Circuit Using 7555 Timer: Build a simple incandescent lamp flasher using a 7555 timer and MOSFETs. Ideal for DIY projects with adjustable flash rate and low parts count.

The Ultimate DIY Guide to Setting Up a GOES-R Series Satellite Receiver for High-Resolution Weather Imagery

The Ultimate DIY Guide to Setting Up a GOES-R Series Satellite Receiver for High-Resolution Weather Imagery: GOES-R series represents NOAA's latest generation of weather satellites, including GOES-16 (GOES East) and GOES-17/18 (GOES West).

RW4HFN Balcony Antenna for the 20-Meter Band

RW4HFN Balcony Antenna for the 20-Meter Band: Discover the RW4HFN balcony antenna design for the 20-meter amateur radio band—ideal for limited spaces. Includes schematic, dimensions, and inductance values

Mosquito TRX: Single-MOSFET 40-Meter (7030 kHz) CW Transceiver

Mosquito TRX: Single-MOSFET 40-Meter (7030 kHz) CW Transceiver: Detailed explanation of Mosquito TRX circuit. Learn how the IRF510acts as crystal oscillator/PA for QRP transmission and direct conversion mixer for 7030 kHz

Practical guide to receiving HF weather fax WEFAX / Radiofax

Practical guide to receiving HF weather fax WEFAX / Radiofax: Learn how to receive HF Weather Fax (WEFAX) images using SDR or shortwave radios. Step-by-step guide for radio amateurs with frequencies, software tools,

Ever wondered how mariners get high-res weather charts in the middle of the ocean without an internet connection? 🌊📡

Check out this excellent practical guide by VU3DXR on receiving HF Weather Fax (WEFAX/Radiofax).

Whether you’re a shortwave hobbyist, a sailor, or just a tech enthusiast who loves "magic" signals, this guide walks you through everything you need to get started in 2026:

✅ Understanding the signal ✅ Essential hardware & software ✅ Finding scheduled frequencies ✅ Troubleshooting your first decode

There’s something incredibly satisfying about watching a synoptic chart or satellite image materialize on your screen, line by line, directly from the airwaves. 📻✨

Read the full guide here: 🔗 https://vu3dxr.in/practical-guide-to-receiving-hf-weather-fax-wefax-radiofax/

#HamRadio #Shortwave #WEFAX #Radiofax #SDR #WeatherGeek #MaritimeRadio #VU3DXR

Super Mini Loop Antenna: A Compact Multi-Band HF Performer

The Super Mini Loop antenna is widely shared in amateur radio circles as a compact, high-performing multi-band antenna. However, much of the information available online either oversimplifies or misrepresents how it actually works. When examined carefully, this antenna is not a special or revolutionary design. Instead, it is a practical implementation of a well-known concept—a full-wave loop—adapted to fit into limited space.

Super Mini Loop Antenna: A Compact Multi-Band HF Performer

Radio Waves Weekly — Issue #009

Radio Waves Weekly — Issue #009: Welcome to Issue #009 of Radio Waves Weekly! This week: CY0S has touched down on Sable Island — North Atlantic rare DX on the air right now.

27MHz AM Transmitter Circuit for hobbyists

DIY 27 MHz AM Transmitter Circuit for Hobbyists! Build your own compact transmitter using simple components like BC547 transistors and a tuned coil. Perfect for short-range experiments and CB radio fun. Full schematic, PCB layout, and step-by-step guide inside!

Check it out: https://vu3dxr.in/27mhz-am-transmitter-circuit-for-hobbyists/

#HamRadio #DIYElectronics #CB Radio #AmateurRadio #27MHz #ElectronicsProjects

The Half Square Antenna: Low-Profile DX Wire for HF Bands

The Half Square Antenna: Low-Profile DX Wire for HF Bands: Build Half Square antenna — a stealthy, no-radial wire delivers ~3 dB gain over a dipole and matches directly to 50-ohm coax. Dimensions for HF bands included.

W3DZZ Multi-Band Antenna 80m-10m Trapped Dipole

Build a Classic Multi-Band HF Antenna!

Discover the W3DZZ Multi-Band Trapped Dipole covering 80m to 10m in this detailed guide from DXR Electronics Bits. Learn how this legendary antenna uses 7 MHz traps to electrically divide the dipole, allowing efficient operation across multiple HF bands with a single wire. The article explains trap construction, antenna dimensions, tuning tips, and installation advice, making it a great DIY project for amateur radio operators who want reliable multiband performance without complex tuners.

🔧 Perfect for hams looking for a compact, efficient, and time-tested HF antenna design.

👉 Read the full guide: https://vu3dxr.in/w3dzz-multi-band-antenna-80m-10m-trapped-dipole/

Getting Started with AIS: Track Ships from Your Shack with a RTL-SDR

Getting Started with AIS: Track Ships from Your Shack with a RTL-SDR: The Automatic Identification System (AIS) is a VHF radio-based collision-avoidance protocol that virtually every commercial, passenger, and large recreational vessel in the world is required to carry. Since 2004, the International Maritime Organization (IMO) has mandated AIS transponders on all ships of 300 GT or more engaged in international voyages, all cargo ships of 500 GT or more on domestic routes, and all passenger ships regardless of size.

Microphone compressor using two transistors

Microphone compressor using two transistors: This microphone compressor circuit utilizes a two-stage amplification design for dynamic range control. Initially, the input signal enters through MK1, a microphone input connector. Subsequently, the signal passes through C1 and C3 coupling capacitors for DC blocking.

Radio Waves Weekly — Issue #007

Radio Waves Weekly — Issue #007: This week: 3Y0K is finally on the air from Bouvet Island — the most remote uninhabited island on Earth — and the pile-ups are epic. The Rebel DX Group is next up with a Kanton Island activation starting March 25. Plus a pocket-sized Indian SDR that does FT8 without a computer, the freshest QRP Labs kit, two wire antennas you can build this weekend, and a handful of contests and events to fill your log before spring.

Sporadic E Propagation: The Science Behind Long-Distance FM Radio Reception

📡 Why did you just hear a radio station from 1,000 km away?

It sounds like magic — but it's pure atmospheric science. Sporadic E Propagation (Es) happens when dense ionized clouds form in the E layer of the ionosphere, bending FM signals back to Earth far beyond their normal range.

This in-depth article from vu3dxr.in covers everything: ✅ The science behind Es clouds ✅ Peak seasons (hint: June solstice is prime time!) ✅ Skip zones and multi-hop paths ✅ Best receivers, SDRs & antennas for FM DX ✅ Pro tips for catching openings in real time

Whether you're a seasoned ham or just curious about that mysterious distant station — this is a must-read!

🔗 https://vu3dxr.in/sporadic-e-propagation-the-science-behind-long-distance-fm-radio-reception/

#HamRadio #RadioDX #SporadicE #FMRadio #RadioPropagation #SDR #AmateurRadio