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A DIY project of a WiFi 10 elements Yagi antenna -
This circuit consists of microphone amplifier and a high pass filter. Suitable to improve signal readability. -
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This max size magnetic loop antenna for 14 MHz with a totall circumference of 6m is designed to attach to a wall -
There is not a personal design on this page, just I've transfered useful notes from PHILIPS RF Bipolar Transistors - Data HandBook about BLY89C VHF Power transistor, which is very popular among Amateur Radio homebrewers -
Antenna experiment a Delta loop antenna for 7 Mhz band -
FT-1000MP series radios solid-state replacement for the CFL backlight. Eliminates the delay and brightness issues. Works on MKV, MKV Field, and 1000MP radios. -
PSK31 is a digital communications mode which is intended for live keyboard-to-keyboard conversations, similar to radioteletype. Its data rate is 31.25 bauds (about 50 word-per-minute), and its narrow bandwidth (approximately 60 Hz at -26 dB) reduces its susceptibility to noise. -
An excellent introduction to ham radio bands, which bands to use and when. -
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conversion of low band VHF Philips FM-828 E band down to 6 metres -
Battery problem with TS-570 -
An home made Butternut HF9V clone antenna by OH2GVB -
Audio setting and improvements for Yaesu FT-2000 by k6jrf -
This little project will make a portable 28 Volt DC power supply using two 12 Volt, 4.5 Ah rechargeable lead-acid batteries -
Calculate power loss depending on coax cable you use -
For macOS users engaged in amateur radio operations, a robust logging solution is essential for tracking QSOs, managing contest entries, and handling QSLs. RUMLog addresses these needs by providing a fully featured logbook program designed specifically for the Apple ecosystem. It integrates capabilities such as transceiver control for popular Icom, Elecraft, Yaesu, and Kenwood rigs, CW keyer interfacing, and real-time DX cluster monitoring. The software also includes mapping functions, callsign checking, and extensive import/export options for various log data formats. RUMLog's design supports both general logging and specialized contest operations, offering tools for efficient entry and submission. Its QSL handling and printing utilities streamline the confirmation process, a critical aspect for award pursuits like _DXCC_. The program's ability to interface with a wide array of transceivers via _Hamlib_ or proprietary protocols ensures broad compatibility, allowing operators to leverage its features across different station configurations. The free availability of RUMLog makes it an accessible option for macOS-based hams seeking a powerful logging utility. -
Sound Byte is a voice keyer for contests as well as general ham radio use. Windows and Mac, commercial by Black Cat Systems -
This page describes a DC to DC voltage converter, pretty simple, for currents up to 500 mA by sv1bsx -
Laws, rules and regulation on scanning expecially in the usa -
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Multi-band loft-mounted dipoles for 40, 20, 17, 15, and 10m -
A homebrew Magmount for 2m antenna -
Iphone app for ncdxf IARU beacon monitoring, shows the currently transmitting beacon on each band, reception charts from the active monitoring stations, and latest solar flux A and K indices -
This antenna analyzer measures complex impedance over the 1.6 - 33 MHz HF spectrum -
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High Voltage Dummy Load 3000 OHMS, 5400 WATTS There are 45 layers of 6 resistors, each one being 400 OHMS @ 20 Watts for a total of 270 resistors -
60KHz to 60MHz. laboratory quality Vector Network Analyzer project -
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The society representing the interests of Amateur Radio in Northern Peninsular Malaysia -
A 40 meter rig with SSB and CW operating modes. This is a low power QRP rig with up to 6 watts CW or PEP output. -
This ia a home built Magnetic loop antenna which was used by G3BGR, indoors on 7,10 and 14Mhz. The basic idea was in Radcom 1986 -
How resolve low power problems on Icom IC-7000 -
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An inverted triangle Delta Loop Antenna for the 40 meter band made with aluminium pipes, each element is 14,2 meters including a home made aluminium mount. -
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A general guide to D-STAR. The purpose of D-STAR is to allow HAM Radio operators to speak further and clearer using digital voice while sending data from 1200 BPS on up at the same time. -
This program allows both great-circle (polar) and rectangular projections of the world. The great-circle map is centered on any specified latitude and longitude (the "home" location). The rectangular projection is shown with the home longitude in the middle of the screen. -
cqham.ru russian only modification page -
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A loop antenna made with common RG-213 coax and rests on a cross made of 6 mm fibreglass rods anf a 6.5- 30MHz tune -
The MobileLog program is a specialty logging program designed for mobile amateur radio operators. It has been designed to allow quick entry of important information regarding QSOs. The software is primarily concerned with the logging of U.S. county information, which may be used to help work toward awards such as the USA-CA award for working all counties in the U.S.A. The data from this program may be imported into your general logging software. This sofware exports data in the ADIF (Amateur Data Interchange Format) and CSV (comma-seprated variable) -
This short dipole antenna has been described by Nadisha, 4S7NR and may be of interest to anyone wishing to get on 80M (3.5MHz) that have limited space available. -
A vertical antenna for 40 meters band by PA5MW -
Windows program for analyzing vertical antennas. This program shows the resistance and reactance to be expected looking into a cylindrical metallic tower over a perfect ground. It gives a useful approximation of the values to be expected in a real-world situation. -
by Steve Hicks N5AC and Jim Boehner N2ZZ