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JL is a free contest logger written entirely in Java. Run under Windows, Linux, Solaris, and MacOS X by W1JQ -
Exaustive shortwave dx and tech resources for BCLs. -
A selection of alphabets used, particularly by ham radio operators, to spell out words -
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How To Connect Elecraft KX3 To iPad -
A review of the IC-7000 at Delta Alfa -
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Dds data- communication Data and Tele-Communication Solutions: UMTS GSM GPRS Telemetry programmers Adeunis RF systems, antennas, radio transmission modules, oscilloscopes GPS and coax cables dealer in Holland -
How to build a phasing harness for stacking antennas -
Open source software designed to control and program the Japan Radio Co. NRD-545 receiver. -
Modifying consumer off the shelf wireless LAN devices for specialized amateur use -
Yaesu FT-2000 on YouTube -
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Dedicated to the preservation and resoration on Antique radios and radio history -
If you need a cheap and easy to construct Subtone Generator for EU-model VHF-UHF rig, here is a solution that works very well. -
The Twin Cities Repeater Club (TCRC) is a charitable public service organization, incorporated as a non-profit Minnesota corporation, that owns four VHF and UHF repeaters in the Minneapolis/Saint Paul metropolitan area. -
H.A.R.C. Radio club in in Phila. Pa. area -
A family oriented Amateur Radio club in the Los Angeles area. -
Radio Remote Control is a complete remote control system for Amateur radio. -
KyteLabs InfoBase - Electron Tubes & Valves Data -
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An home made Man-pack designed to host and FT-857, LDF ATU amd a 7Ah battery -
An interesting article on how to make copper cactus J-Pole antennas -
The performance of a small magnetic loop can be improved constructing it larger, thicker or both. The antenna is covering from 12 Megahertz to 32 megahertz and adding a 156 Pico farads ceramic capacitor it resonates on the 40 meters band. by PY1AHD -
DL7JV Christian report his direct experience on magnetic antennas -
80 to 6 meters, 2 KW, designed to be used at heights of only 25 to 45 feet, includes a twenty foot long vertical radiator -
The Ukrainian Contest Club (UCC) The Ukrainian Amateur Radio League (UARL) -
Isolation vs antenna separation an interesting article by WA6ILQ -
Mission is to preserve the history and enhance the knowledge of radio. -
Contest team 9A7A, basic info and photos about our activities -
History of codes of the world, russian codes, visual codes, and al long collection of telegraph codes as used worlwide including the international morse code and the relative variations -
Electro-Voice Model 664 (EV 664) cardioid microphone, wiring diagram, pictures and data sheet -
Adventure Radio, articles and reviews. This site has a whole host of ham related information. -
QST Magazine said, We have the hardest T-Hunts in the Country -
A three band short Vee antenna is feasible with two legs per side on a dipole. 10-15-20 meters by W8HDU -
Largely US based information on travel warnings, US Embassy info, Lists of Doctors/hospitals overseas, passport info, and general travel tips etc. -
Located about 25 miles south of Boston, MA, near the City of Brockton. -
Information and news about Amateur Radio in Scotland -
A VHF UHF handheld antenna suitable for satellite operation by LY3H include antenna plan with dimensions and pictures. -
CWS ByteMark's Baluns (Balanced to Unbalanced) and Ununs (unbalanced to unbalanced) transformers are developed jointly with Dr. Jerry Sevick, W2FMI, who is known worldwide for his work on transmission line transformers -
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A 4-Band vertical antenna that needs NO tuner, NO traps. Implement an LC matched on 4 bands with relay switching. -
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K4JRG GAP titan dx specifications -
W0CUO Grand Island Amatuer Radio Society. Grand Island Nebraska. -
To aid in learning and improving Morse code proficiency, this resource offers an extensive collection of downloadable MP3 audio files. The content includes character practice groups, common words, punctuation, and full-length novels, all rendered in CW. Speeds incrementally increase, catering to both beginners and those aiming to build speed, with options for _Farnsworth_ spacing at lower WPM and standard spacing for higher rates. The resource also provides a Perl script, `gus_morse.pl`, allowing users to generate custom audio files from UTF-8 text. Users can download archives of sequential MP3 files, with options for English, German, Spanish, Esperanto, and Italian content. The audiobooks progress from **5 WPM** to over **40 WPM**, with some archives offering _omnibus_ collections of multiple works. The site emphasizes the importance of consistent daily practice and patient aural observation to develop procedural memory, moving beyond conscious dit and dah counting to direct character recognition. It also details the transition from Farnsworth to normal spacing, aligning with FCC and ARRL recommendations. -
The Receiver Test Data resource is a detailed review database focusing on the performance metrics of various radio receivers. The methodology involves rigorous lab measurements, often adhering to standards such as the ARRL RMDR (Reciprocal Mixing Dynamic Range) and BDR (Blocking Dynamic Range). Specific test equipment and protocols are utilized to assess parameters like noise floor (dBm), AGC threshold (uV), and LO noise (dBc/Hz). For example, the _Icom IC-7300_ is evaluated with a noise floor of **-133 dBm** and an LO noise of **-141 dBc/Hz**, providing insights into its performance under different operational conditions. The resource includes a wide range of models, from the _Elecraft K3S_ to the _Yaesu FTdx-101D_, each tested for dynamic range, sensitivity, and selectivity. The data is sorted by key metrics such as third-order dynamic range and phase noise limitations, with RMDR values calculated by subtracting 27 dB from LO noise figures. This structured approach allows users to compare different receivers' capabilities, focusing on technical specifications and performance outcomes in various scenarios. DXZone Focus: Review Database | Lab Measurements | -133 dBm | ARRL RMDR -
Recepteur decametrique 3 - 30 MHz Detection classique et SDR