Science & Nature
1439 sites
Subcategories:
- Astronomy & Space (396)
- Chemistry (8)
- Earth Sciences (26)
- Biology (79)
- Physics (30)
- Mathematics (59)
- Weather & Climate (104)
- Amateur Radio (682)
- Electronics (47)
https://irlp.net/
The official home of the Internet Radio Linking Project (IRLP), a system that connects amateur radio repeaters around the world using Voice over IP technology. The site provides information, maps, node codes, frequencies, and technical details for ham radio operators looking to link into the IRLP network.
https://wm7d.net/
Mark Downing (WM7D) runs this ham radio hub featuring a searchable callsign database, real-time solar flux reports, and dedicated resource pages for Yaesu radios including the FT2000, FT920, and FT100. Visitors will also find DX cluster links, QSO maps, TR Log for Linux, and a curated collection of amateur radio links.
http://ee.cleversoul.com/
The EE Compendium is a comprehensive reference hub for electronics engineers, students, and hobbyists covering microcontrollers, embedded systems programming, and hardware development tools. Visitors will find curated links and resources spanning popular platforms like Atmel AVR, Microchip PIC, Intel 8051, and Freescale chips, along with project kits, robotics, software compilers, and career resources.
https://dxing.com/
DXing.com is a comprehensive reference site sponsored by Universal Radio Research, covering shortwave listening, scanner monitoring, ham radio, pirate radio, numbers stations, and more. Originally created by noted author Harry Helms, it features receiver surveys, frequency guides, QSL reporting tips, and columns from well-known radio writers like Glenn Hauser and Don Schimmel.
http://wa0h.com/
Jerry Gentry (WA0H) offers MicroLog, a free ham radio logging program with built-in callbook integration for Buckmaster Hamcall, RAC CD, and QRZ. The site also sells a math book and programming book authored by Jerry, making it a compact but practical resource for amateur radio operators.
http://csgnetwork.com/hamfreqtable.html
CSGNetwork's Amateur Radio Frequency Table is a comprehensive reference listing all US ham radio band allocations, including mode restrictions, calling frequencies, and licensing class privileges across bands from 160 meters to microwave. Part of a larger calculator and reference site, it also links out to related frequency tables for CB, FRS, marine VHF, cellular, and cordless phone bands.
http://kf6c.com/
KF6C is an amateur radio operator's site featuring information on remote radio operation, custom transceiver designs like the SL600 and G3ZVCmkII, and vintage radios including Eddystone and Collins equipment. Visitors can also browse hard-to-find parts and accessories for sale, making it a useful stop for both radio hobbyists and collectors.
https://www.qsl.net/ac6xi
AC6XI's personal amateur radio homepage, featuring a link to a how-to page and contact information for this licensed ham operator. The site is sparse but serves as a basic online presence for the callsign AC6XI, with promises of future updates.
https://www.qsl.net/i6ypk
I6YPK's workshop page showcases homebrew HF transceiver projects built in collaboration with I6WJB, including double and triple conversion designs covering 0-30 MHz continuous coverage. The site also features HP spectrum analyzer and frequency standard resources, making it a valuable technical reference for radio electronics builders.
http://bas-astro.com/
BAS Astro appears to be an astronomy club or society website, with the domain name strongly suggesting a regional or local astronomical association. The site likely serves as a hub for amateur astronomers to share observations, events, and resources.