low pass filter 144mhz

Barlow Wadley XCR-30 Home Page - A site all devoted to the first full coverage HF transistorized portable set of the world.

Hams for Christ Net - Fellowship of Christian Amateurs meeting M-F on 40 meters

Christian Amateur Radio Fellowship - CARF combines the wonderful world of amateur radio with Christian fellowship and service

Rockingham County Amateur Radio Club - Fellowship for all Amateur Radio Operators of Rockingham County. Home of the N4IV repeater system. Licensing classes, testing, ARES, and Skywarn

Knightsqrss Info Page - This mailing list is devoted to low power, narrowband experimenting (QRSS CW, DFCW, etc). You are invited to share your ideas with the group, announce on-the-air schedules, etc by posting messages

Eurofrequence Dierking NF HF Technik - UFB Hamradio audio filters and more accessories

Radio Filters.Com - Low Cost FM Notch Filters: Radio Filters.com, manufactures frequency control products including band pass, notch, reject, electronic filters

Laipac Technology Inc. - We are committed to constantly improving our solutions in areas of GPS System, GPS Receivers, GPS Antennas, GPS Dataloggers, RF Modules, Wireless Security Systems, Automatic Vehicle Location (AVL) for real time and passive tracking

Internet Radio Linking Database - The purpose of this site is to allow users to be able to easily search an area and determine what users or linked systems are available for use there.

KC5ORO Echolink Internet Linking System - Echolink is software that allows amateur operators to communicate via the internet. It works by VoIP or Voice over IP technology

ESR Magazine - electronics-science-radio - ESR is a magazine for Amateur Radio, CB, Broadcast, SWL and Scanning. Aim is to promote all hobby uses of radio, and to encourage students to follow a career in electronics and radio.

AnyMHz.com - Low cost parts store, electronic components, ham radio accessories.

Cheap QSL'S - Low cost QSL cards for the Amateur and SWL

YagiCAD - A freeware software package for Yagi design. This webpage also contains many sample and standard antenna downloads for experimentation.

MultiPSK  ^{updated  pop} - Windows freeware miltimode program by F6CTE that supports BPSK31 QPSK31 PSK63 PSK63F PSK10 PSKFEC31 PSKAM CW CCW THROB 4 bauds THROBX RTTY SITOR-AMTOR-NAVTEX FELD HELL PSK JT65 HELL HF FAX SSTV FILTERS

Smith chart calculator - linSmith is a Smith Charting program, mainly designed for educational use. It allows defining multiple load impedances (different frequencies), and adding components (discrete components and line sections) in series and parallel. It plots the impedances on the screen, shows the values in table format, and is able to generate publication quality Postscript output.

iSpectrum Analyzer - Macintosh audio spectrum analyzer that allows the user to view live audio in a standard frequency plot, a stereo oscilloscope view and a waterfall display

ISSTV - ISSTV is a freeware software for amateur radio that allow sstv connections via internet and radio waves

SSTV32 Slow Scan for Windows - SLow scan software that runs in Windows 95 and up (32 bit), this app uses the sound cart and is loaded with functions and operator modes.

Axis Spectrum Analyzer - Axis Spectrum Analyzer allows you to record audio along with sincronized 31 band spectrum analyzer readings from any audio source to be inputed into Macromedia Flash movies in an easy to integrate way. The software can also be used to display real-time audio with customized visuals on video devices such as projectors, tvs,etc.

Defpom's CB Radio Simulator - It is a application which can be used for troubleshooting CB radio faults, by giving a graphical display of the normal operating frequencies generated by various parts of the CB radios circuits, it can help you identify if a frequency is incorrect or even missing. Another good use for this software is simulating possible frequency expansions, as it allows you to choose any frequency that the PLL is capable of generating, so you can see what the radio will allow you to get !

Variable bandwidth cw filter - As the sunspots return and DX propagation conditions to improve, the age old problem with QRM begins to show up on the amateur bands. Thif filter help you on improving reception

Fox Tango International - Yaesu FT-101 Users Group purpose and scope is to serve as a sort of benevolent, protective, mutual aid and social club, essentially for the purpose of interchanging information, ideas, experiences and problems. By and for owners of Yaesu amateur radio equipment. Founded in 1972 by Amateur Radio operator Milton Lowens N4ML

Crystal Radios at crystalradio.org.uk - Shortwave and broadcast band listening using crystal (passive) radio.

SWR bridge - This SWR bridge works by sampling the amount of power flowing in each direction along the aerial feeder.