Search results

Evaluates the **LDG Z100 autotuner**, a device designed to automatically match antenna impedance for optimal transmission efficiency. The review discusses its performance in comparison to the MFJ-902, noting that while the Z100 is a reliable autotuner, it does not match the range of impedances that the MFJ-902 can handle. The Z100 is suitable for operators seeking a 100-watt autotuner that covers HF bands, providing a practical solution for those who require automatic tuning without manual adjustments. The review highlights the Z100's operational context, focusing on its use in HF bands and its practical application in amateur radio setups. While it offers a straightforward tuning process, the Z100's limitations in impedance matching are noted, making it less versatile than some competitors. This comparison provides valuable insights for operators considering an upgrade or replacement for their current autotuner. The Z100's performance is positioned within the broader market of autotuners, offering a clear perspective on its strengths and weaknesses in real-world amateur radio operations.

A simple VHF quarter wave antenna from PL25

Central Oregon DX Club N7LE

A browser based circuit simulator offering a large set of functionalities allowing to share and discuss designs

Ham Radio fonts that have the slash zero also morse code fonts

The SDRanywhere application is an Android app that allows remote operation of an RFSPACE SDR-IQ, NetSDR, SDR-IP or Cloud-IQ radio from anywhere in the world. The demodulated audio and waterfall information is compressed and sent to the client application using a low bandwidth internet connection.

Automated use of EZNEC. AutoEZ is an Excel application that works in conjunction with the EZNEC antenna modeling programs and allows you to use variables to control diverse aspects of the model. You can then run multiple EZNEC test cases while AutoEZ automatically changes one or more variables between runs. Commercial version and free demo available for download.

Por una Radioaficion unida y solidaria . Uruguay

Tips and advice compiled from The DX Reflector

Information about setting up a Solar Powered Ham Radio Station.

A simple kit for temporary, lightweight, wire tactical antenna systems is essential for any field Ops. Described in this article a kit as it fits in a standard US Military M-1956 Butt Pack

Southern Michigan Amateur Radio Society Battle Creek,Michigan

This is a neat little adapter that allows the use of a cell phone type Headset with your Amateur Radio.

Schematic for a 1200/300 baud modem for baycom compatible software

An RF Probe project by N5ESE

Manufacturer of professional antenna and filter systems for communications and broadcasting, serving commercial and governmental markets worldwide.

This group is for any Amateur Radio Televison Enthusiast. From 70Cms - 13Cms and above.

DTMF Remote Controls, DTMF tone generators and broadcasting products, remote broadcasting via cell phone, cell phone mixer and remote phone keypad

An attempt to make a capacitor out of kitchen foil and cling film

Windows shareware Log program for the IARU HF Contest

This LPDA calculator is based on the design procedure as described by L. B. Cebik, W4RNL (SK) in the 21st edition of The ARRL Antenna Handbook.

SWR or VSWR - the most widely known yet most misunderstood terms in Amateur Radio. Article by GW6ITJ

North Texas QRP Club

Experimental Software for the Yaesu VR-120 and Yaesu VR-120D Receivers

A kit Digital VFO with pre-soldered surface mount parts and burned-in firmware, a scratch build with Arduino Nano, C code with modifications, and a Silicon Labs si5351 PLL clock generator on a breakout board.

DesignSpark PCB is the world's most accessible electronics design software, specially designed for Rapid Prototyping and turning your circuit ideas into testable boards faster. Easy to learn and easy to use, DesignSpark PCB is free and can you can download DesignSpark from this site.

The problem originates by improper TXOUT-to-RF timing (RF transmission exists still after a TX-EN prohibition), combined by too long decay of their CW pulses.

This is an on-line rf attenuator calculator provided free in order to promote the FLEXI-BOX. Calculates the resistor values, attenuation, minimum attenuation, impedance, reflection coefficient, VSWR and return loss of a matching Pi attenuator

TenTec 1300-Series QRP CW Transceiver Kits

radio groups and packet radio

Serving The Interests Of Amateur Radio For Over 70 Years

Programming software for the Yaesu FT-60(R)

Nuand id the maker of bladeRF - the USB 3.0 Superspeed Software Defined Radio, 300MHz - 3.8GHz RF frequency range Independent RX/TX 12-bit 40MSPS quadrature sampling

Whats new on ham radio with digital modes? DRMDV

Rotation-Shift Keying description, imlementation and test results. Orthogonal BPSK, Twist Modulation, Moon Bounce

Simple steps you can take to solve most problems caused by station equipment

A 144MHz FM class C RF Power Amplifier based on a 2N6084 RF transistor, that can produce 50w output max

Amateur projects to investigate radiowave propagation - G3PLX's chirp project, ionosonde database, and more

Icom IC 756 Pro 3 English User Manual in a PDF file

Windows PC control program for the Icom IC-7300 transceiver. Power-on and Power-off by software BktNetInterface for JTDX and WSJT-X, audio recording, memory management, cw keyer management, Interface for other software

An article comparing the Icom 7610 transceiver over The FlexRadio Flex 6400M

Kenwood Portable SSTV device

This Frequency Counter Development Kit is fully functional with the included pre-programmed microprocessor

The Alpha-Delta group is a group dedicated 100% to DX Oncemetros in the band and can say that is 100% of Mexican origin.

A comprehensive and up to date log by F5GIT dedicated to the Ham radio hobby

How to receive automatically NOAA wather satellite images with a Raspberry Pi and a RTL SDR. This project requires a Raspberry Pi 3 Model B a common NooElec SDR Dongle and a QFH Antenna in the attic. Article explains how to setup and configure software but no instructions on antenna.

Manufacture remote control interfaces to manage several kind of ham radio transceivers, Antenna rotators and antenna switches. Control can be done using smartphone Apps or from Computers.

A very informative review of the Icom IC-7300 direct RF sampling transceiver, including audio samples, recordings and a comparison vs the Elecraft KX3

A blogspot blog about Software Defined Radio

H.A.R.A.O.A