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Italian page about a home made a 1 to 40 balun with pictures and measurements on HF bands. -
Demonstrates the construction of a 144 MHz turnstile antenna, detailing its design for omnidirectional, horizontally polarized VHF operation. The resource outlines the physical dimensions and materials required, including specific lengths for the radiating elements and the use of _RG-58_ coaxial cable for phasing. It covers the assembly process, emphasizing the critical spacing and connection points to achieve the desired radiation pattern and impedance matching for the _2-meter band_. The article presents measured _SWR_ performance across the 144-146 MHz segment, showing a low SWR of 1.2:1 at 144.5 MHz, which is suitable for general VHF use. It compares the turnstile's performance to a 9-element Yagi, noting the turnstile's advantage in providing consistent signal strength from all directions without requiring a rotator. Practical application for local FM simplex and repeater operations is implied, offering a simple yet effective antenna solution for fixed or portable stations. -
Cobalt Pet is a weblog focusing on shortwave radio. It features shortwave reception reports, product reviews, photos, listening tips, and links. International broadcasters and amateur / ham radio operators are monitored and discussed. -
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Ham Radio Kits, including HF QRP SSB transceivers by EA3GCY -
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A homebrewed antenna for 2m handheld radios by TB1BIG -
Amateur Radio operator interested in mobile & emergency operations, with some portable QRP operations. -
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EchoLink and IRLP Internet Radio Linking Project Node's, Hurricane Watch Audio Feed's and Info, Live Scanner/Other Feed's from the USA, Local Ham Frequencies, Online Receiver's, Shoutcast Live Audio Feed's from the USA, Southern California Frequencies and more -
Operating on the 2200m band (135.7-137.8 kHz) often presents challenges for amateur radio transceivers, which typically exhibit poor receiver performance at these very low frequencies. This project addresses the issue by providing a design for a dedicated 137 kHz antenna preamplifier, specifically tailored to improve signal reception for radios such as the _Yaesu FT-817_. The preamplifier circuit utilizes a low-noise FET input stage, crucial for minimizing self-generated noise and maximizing the signal-to-noise ratio from weak LF signals. The design includes a detailed schematic, component values, and construction notes, enabling homebrewers to build a functional unit. The goal is to achieve significant gain, making the faint signals on 2200m more discernible and improving overall band usability. Key design considerations include impedance matching to typical antenna systems and ensuring stable operation across the narrow LF segment. The circuit aims for a **low noise figure** and sufficient amplification to overcome the inherent limitations of general-purpose HF transceivers when operating below **200 kHz**. -
G0KYA experience on hustler 5 BTV antenna -
This modification will expand the tx frequency range of the Yaesu FT-991 from allowing just ham radio bands, to all bands 1.8 - 30MHz and 50-54 MHz.This information is solely for use by licensed members of MARS (Military Affiliate Radio System) or CAP (Civil Air Patrol) -
Homemade hamstuf, mostly homebrew antennas in Dutch -
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Experiments with an 80 meter Inverted L Quarter wave antenna -
ARRL video review of the Yaesu FTDX-5000 -
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This tutorial provides step-by-step instructions for setting up the ICOM IC-7300 to work with WinLink and WinMor. The process begins with downloading the necessary USB driver from ICOM Japan, followed by configuring the radio settings through the menu. Key settings include selecting the correct output and data modes, as well as ensuring the USB serial function is properly set. Once the radio is connected to the PC via USB, the drivers will install automatically, allowing for seamless communication. After confirming the installation of the USB Audio CODEC and COM port, users are guided to download the RMS Client Software for WinLink. The tutorial emphasizes the importance of understanding the WinLink system and provides links to additional resources for setup. Finally, it details how to configure the WinMor modem settings, ensuring the ICOM IC-7300 is ready for effective digital communication. This guide is essential for operators looking to enhance their digital capabilities using the IC-7300. -
This circuit stores a single morse code message as bits in an EPROM chip, the message is sent to a relay which can key a CW transmitter. -
This is the schematic of asolid-state 7 MHz QRP CW transmitter by VU2NAN -
Decoding NOAA APT weather satellite images is achieved with a homebrew receiver and a Turnstile Cross Dipole antenna, feeding data to a Pentium-3 500MHz PC running Windows XP and the WXTOIMG program. This setup, operated by VU2IIA in Mumbai, India, focuses on capturing and processing signals from NOAA satellites to generate visual weather data. The blog documents the technical aspects of constructing the receiving station, including antenna design and receiver integration. It provides insights into the practical challenges and successes of amateur satellite reception, specifically for Automatic Picture Transmission (APT) signals. Operational details cover the software configuration and image processing workflow necessary to transform raw satellite data into usable weather imagery. The content serves as a practical guide for radio amateurs interested in satellite meteorology. -
An home made magnetic loop antenna project using a military surplus 150pf capacitor by KF5CZO -
An efficient monoband end-fed half wave for 10m, 20m or any other HF band -
An homebrew project for a 3 element coil-loaded Yagi beam antenna for 40 Meter band -
Personal review of the Yaesu VX-6R handheld transceiver -
A very interesting blog article on a real world comparison on the popular multiband wire antenna, the G5RV, by Bob Raynor N4JTE -
Building Eggbeater II Omni low Earth orbit satellite Antennas for 70cm by ZR6AIC -
Ham radio blog dedicated to military radio equipment by EA3FOW -
A home made dipole antenna for 10m, 6m, 4m bands made with two sections of 450 and 300 Ohm ladder lines, cut to achieve acceptable SWRs on all bands -
A 2 element Narrow Diamond Loop Array for 40 Meters by VE3VN -
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Personal Blog devoted to ham radio topics,homebrew,antenna,satellite and other projects -
Expeimenting with DSP digital signal processing on Arduino -
An homebrew Lindenblad antenna designed specifically for LEOs reception. -
Repairing and restoring a Yaesu FL-2100Z amplifier -
Repairt a Heathkit SB-220 Linear Amplifier with a bad Plate Voltage meter -
An Offset Attenuator for fox hunts. -
Antenna model for a diamond loop wire antenna for the 40 meter band -
A simple 50 ohm dummy load to test transmitters. includes a simple RF diode detector to measure the peak voltage, and calculate the power -
An homebrew project for a 4 elements yagi monoband antenna for the 10 meters by 9M2MSO -
low-noise amplifier for HF reception, amplifies signals 80 to 100 times between 0.15 MHz and 30 MHz. It will let you hear more signals with your RTL-SDR plus Ham-It-Up setup -
A review of the Yaesu FT-857D mobile transceiver by yo3hjv -
Installing a classic G5RV Antenna in Slopinv-V mode by AI4WM -
Delta loop antennas for 40 meters plans and comparison of some models -
An omnidirectional and horizontally polarized VHF antenna by EA4EOZ -
This is a one for all antenna tuner with wide range tuning on all the HF bands. The tuner is based on a G3WQW design. DIY project by PD7MAA -
The HF horizontal loop has been around for many years now. This article includes a YouTube video and discusses the reasons for looking at this antenna, its design, and its installation. There are some on-air comparisons against three regular double bazooka (coax) dipoles and the Par SWL End-Fed antenna. -
Heathkit SB 220 mods, replacing the Zener ZD1, replacing the plate-voltage voltage divider, adding a keying circuit for solid state transceivers