@vu3dxr.bsky.social
Evolution of the ATS Mini: A Technical Deep Dive into V1 through V4 vu3dxr.in/evolution-of...
Evolution of the ATS Mini: A Technical Deep Dive into V1 through V4
From 3D-printed cases to CNC Aluminum shielding. See how the ATS Mini became the ultimate pocket SDR
vu3dxr.in
January 29, 2026 at 8:50 AM
Evolution of the ATS Mini: A Technical Deep Dive into V1 through V4 vu3dxr.in/evolution-of...
Simple two stage one watt AM transmitter vu3dxr.in/simple-two-s...
Simple two stage one watt AM transmitter using BD139
This is a simple two stage transistor one watt AM transmitter for the HF which gives watt in output using easily available transistor like BD139 in final stage.
vu3dxr.in
January 29, 2026 at 6:41 AM
Simple two stage one watt AM transmitter vu3dxr.in/simple-two-s...
Noise Cancelling Condenser Microphone vu3dxr.in/noise-cancel...
Noise Cancelling Condenser Microphone circuit
Noise cancelling condenser microphone is a great choice for noise-cancelling applications, work in conjunction with active noise-cancellation.
vu3dxr.in
January 29, 2026 at 6:00 AM
Noise Cancelling Condenser Microphone vu3dxr.in/noise-cancel...
Build a High-Sensitivity Regenerative Receiver with 2N7000 MOSFET vu3dxr.in/build-a-high...
Build a High-Sensitivity Regenerative Receiver with 2N7000 MOSFET
DIY Circuit for 2N7000 regenerative receiver with air-core and ferrite coils. Includes band coverage tables, regeneration theory, and practical tuning tips
vu3dxr.in
January 28, 2026 at 4:15 PM
Build a High-Sensitivity Regenerative Receiver with 2N7000 MOSFET vu3dxr.in/build-a-high...
How to Build a Reduced Size 40M Antenna – Complete DIY Guide vu3dxr.in/how-to-build...
How to Build a Reduced Size 40M Antenna – Complete DIY Guide
Build a compact reduced Size 40M Antenna using PVC spacers and simple materials. Get full measurements, design diagram, assembly steps, and tuning tips
vu3dxr.in
January 28, 2026 at 10:19 AM
How to Build a Reduced Size 40M Antenna – Complete DIY Guide vu3dxr.in/how-to-build...
Morgain Antenna: Dual-Band Dipole that Beats Traps vu3dxr.in/morgain-ante...
Morgain Antenna: Dual-Band Dipole that Beats Traps
Build high-performance HF Morgain antenna with accurate dimensions and simple construction. Complete guide with diagrams, spacing, materials, and tuning tips.
vu3dxr.in
January 28, 2026 at 10:15 AM
Morgain Antenna: Dual-Band Dipole that Beats Traps vu3dxr.in/morgain-ante...
G4RAW 80M QRP TAG CW Transmitter vu3dxr.in/g4raw-80m-qr...
G4RAW 80M QRP TAG CW Transmitter G4RAW 80M QRP Transmitter
G4RAW 80M QRP CW Transmitter, a popular, simple, and low-power (QRP) Continuous Wave (CW) transmitter design for the 80-meter amateur radio band.
vu3dxr.in
January 28, 2026 at 10:02 AM
G4RAW 80M QRP TAG CW Transmitter vu3dxr.in/g4raw-80m-qr...
1:49 UNUN using two stacked FT240-43 cores for endfed halfwave antenna vu3dxr.in/149-unun-usi...
1:49 UNUN using two stacked FT240-43 cores for EFH antenna
1:49 UNUN is a type of transformer that can be used to match an end fed half wave antenna to a 50 ohm coaxial cable. It is made from two stacked FT240-43 cores.
vu3dxr.in
January 28, 2026 at 9:58 AM
1:49 UNUN using two stacked FT240-43 cores for endfed halfwave antenna vu3dxr.in/149-unun-usi...
Rothammels Antenna Book – Translated and revised from the 13th German edition vu3dxr.in/rothammels-a...
Rothammels Antenna Book for Radio amateurs
Rothammels Antenna Book - Translated and revised from the 13th German edition makes even constructive solutions accessible to more radio enthusiasts
vu3dxr.in
January 28, 2026 at 9:57 AM
Rothammels Antenna Book – Translated and revised from the 13th German edition vu3dxr.in/rothammels-a...
WebSDR India – GRMS BENGALURU vu3dxr.in/websdr-hf-gr...
WebSDR India – GRMS BENGALURU
WebSDR India Location - Bengaluru, India | http://106.51.131.254:8073/ Windows: Firefox, Chrome & Edge work; IE does not work. Mac & Linux: Safari, Firefox, Chrome & Opera should work fine. Open and c...
vu3dxr.in
January 28, 2026 at 9:52 AM
WebSDR India – GRMS BENGALURU vu3dxr.in/websdr-hf-gr...
Full Wave Loop Antenna for VHF, UHF & FM Radio Bands vu3dxr.in/full-wave-lo...
Full Wave Loop Antenna for VHF, UHF & FM Radio Bands
Learn how to construct a DIY Full Wave Loop antenna for 145 MHz, 435 MHz, and FM bands. Includes precise dimensions and a step-by-step build guide.
vu3dxr.in
January 27, 2026 at 9:47 AM
Full Wave Loop Antenna for VHF, UHF & FM Radio Bands vu3dxr.in/full-wave-lo...
Building the LARCSet v3.0: Real-World Problems and Proven Fixes from the BITX20 Community vu3dxr.in/building-the...
vu3dxr.in
January 27, 2026 at 5:37 AM
Building the LARCSet v3.0: Real-World Problems and Proven Fixes from the BITX20 Community vu3dxr.in/building-the...
G4RAW 80M QRP TAG CW Transmitter vu3dxr.in/g4raw-80m-qr...
G4RAW 80M QRP TAG CW Transmitter G4RAW 80M QRP Transmitter
G4RAW 80M QRP CW Transmitter, a popular, simple, and low-power (QRP) Continuous Wave (CW) transmitter design for the 80-meter amateur radio band.
vu3dxr.in
January 23, 2026 at 8:53 AM
G4RAW 80M QRP TAG CW Transmitter vu3dxr.in/g4raw-80m-qr...
Do it yourself Shortwave Transmitter circuit vu3dxr.in/circuits-sho...
Do it yourself Shortwave Transmitter circuit
This Shortwave transmitter circuit operates in shortwave HF band (6 MHz to15 MHz), and can be used for short range communication and for educational purposes.
vu3dxr.in
January 23, 2026 at 8:36 AM
Do it yourself Shortwave Transmitter circuit vu3dxr.in/circuits-sho...
40m Vertical Antenna: Compact Base-Loaded Design for Powerful HF Operation vu3dxr.in/40m-vertical...
40m Vertical Antenna: Base-Loaded Design for HF Operation
Build an efficient 40m vertical antenna with a 15µH base loading coil and short radiator. Ideal for compact HF setups and portable amateur stations
vu3dxr.in
January 23, 2026 at 7:09 AM
40m Vertical Antenna: Compact Base-Loaded Design for Powerful HF Operation vu3dxr.in/40m-vertical...
Microphone compressor using LM1458 vu3dxr.in/microphone-c...
Microphone compressor using LM1458 dual op-amp
The LM1458 is a dual op-amp used in audio amplification circuits. Here how you can create a simple microphone compressor using the LM1458.
vu3dxr.in
January 22, 2026 at 1:45 PM
Microphone compressor using LM1458 vu3dxr.in/microphone-c...
Mighty Mite 5W Crystal Controlled QRP CW Transmitter vu3dxr.in/mighty-mite-...
Mighty Mite 5W Crystal Controlled QRP CW Transmitter
Build classic Mighty Mite 40-meter QRP CW transmitter. Full circuit overview, operation, and design explanation. Ideal DIY ham radio project for enthusiasts.
vu3dxr.in
January 22, 2026 at 1:07 PM
Mighty Mite 5W Crystal Controlled QRP CW Transmitter vu3dxr.in/mighty-mite-...
Build Your Own Multiband G5RV Antenna: A Classic Ham Radio Project vu3dxr.in/build-your-o...
Build Your Own Multiband G5RV Antenna for 80-10M Bands
Learn how to build a classic multiband G5RV antenna. This guide provides a detailed diagram and insights into constructing this versatile HF antenna.
vu3dxr.in
January 21, 2026 at 6:08 AM
Build Your Own Multiband G5RV Antenna: A Classic Ham Radio Project vu3dxr.in/build-your-o...
Terminated Mini Loop Antenna : Small Space Ham Radio Antenna vu3dxr.in/terminated-m...
Terminated Mini Loop antenna : Small Space Ham Radio Antenna
The Terminated mini loop antenna is a relatively simple antenna to construct. It can provide the user with wide/multi band access
vu3dxr.in
January 20, 2026 at 4:19 PM
Terminated Mini Loop Antenna : Small Space Ham Radio Antenna vu3dxr.in/terminated-m...
Getting Started with FreeDV: A Beginner’s Guide to Digital Voice on Amateur Radio vu3dxr.in/getting-star...
Getting Started with FreeDV: A Beginner’s Guide to Digital Voice on Amateur Radio
Learn FreeDV digital voice for amateur radio. Beginner's guide covers setup, equipment, modes, and making your first contact using open-source software.
vu3dxr.in
January 20, 2026 at 9:00 AM
Getting Started with FreeDV: A Beginner’s Guide to Digital Voice on Amateur Radio vu3dxr.in/getting-star...
Building Sovina 40M Class E CW Transmitter with BS170 MOSFETs vu3dxr.in/building-sov...
Building Sovina 40M Class E CW Transmitter with BS170 MOSFETs
High-efficiency 40M CW Class-E CW transmitter using BS170 MOSFETs and 74HC02. Complete circuit explanation and build notes for QRP hams.
vu3dxr.in
January 19, 2026 at 3:48 PM
Building Sovina 40M Class E CW Transmitter with BS170 MOSFETs vu3dxr.in/building-sov...
Build a Powerful FM Radio Bug Transmitter vu3dxr.in/build-a-powe...
Build a Powerful FM Radio Bug Transmitter
guide on building a high-performance FM radio bug transmitter using BC547 and 2N3563 transistors. Explore RF electronics with this powerful 100MHz DIY project
vu3dxr.in
January 19, 2026 at 11:39 AM
Build a Powerful FM Radio Bug Transmitter vu3dxr.in/build-a-powe...
Tree Mounted Quarter-Wave Vertical Antenna vu3dxr.in/tree-mounted...
Tree Mounted Quarter-Wave Vertical Antenna
Technical explanation of a tree-mounted quarter-wave vertical antenna using only two sloping radials. Covers working principle, feed impedance and construction,
vu3dxr.in
January 19, 2026 at 5:30 AM
Tree Mounted Quarter-Wave Vertical Antenna vu3dxr.in/tree-mounted...
Building the FBK Sleeve Antenna for VHF/UHF Amateur radio vu3dxr.in/building-the...
Building the FBK Sleeve Antenna for VHF/UHF Amateur radio
Build a compact dual-band FBK sleeve antenna for VHF/UHF bands from coax cable. Simple, efficient, and ideal for portable ham radio use.
vu3dxr.in
January 10, 2026 at 3:13 PM
Building the FBK Sleeve Antenna for VHF/UHF Amateur radio vu3dxr.in/building-the...
Hotel Antenna for 2 Meter and 70 Centimeter Amateur Bands vu3dxr.in?p=3648
Hotel Antenna for 2 Meter and 70 Centimeter Amateur Bands
Compact Hotel Antenna design for 2 meter and 70 cm amateur radio bands. Includes dimensions, working principle, installation tips, and performance details
vu3dxr.in
January 10, 2026 at 4:42 AM
Hotel Antenna for 2 Meter and 70 Centimeter Amateur Bands vu3dxr.in?p=3648