motorola gp 300

A cheap dual band ground plane antenna - This little antenna is cheap and easy to build, lightweight, and very functional on 2 meters and 70 centimeters by NA4IT

HB9CV antenna calculator - Calculate dimension for HB9CV directional antennas

Yagi UDA Calculator - Online Yagi Uda antenna calculator

Helix Antenna Calculator - Online helix antenna designer, calculate size of helix antennas online

Discone Antenna Calculator - Calculate dimension for discone antennas online

Log Periodic Antenna Calculator  ^updated - Online calculator for Logarithmic Periodic Dipole Antenna LPDA

J-Pole antennas - An easy portable VHF antenna to build for ARES - RACES work is the 300 Ohm Twin Lead JPole antenna

40 80 Meter GP Vertical - A vertical antenna for 40 and 80 meters band with no need of antenna tuner, based on a telescopic fiberglass mast of 48 feet by N8NSN

BiQuad Antenna calculator  ^updated - Online calculator for Bi-Quad antennas

Cantenna Calculator - Online calculator for Cantenna special antenna for 802.11 Wi-Fi bands

Tiny Track I - Tiny Track-I is a simple unit offering the transmission of your position-data (as mobile etc) in APRS , just by using a VHF and a GPS.

A long wave receiving system - A long wave receiving system using FFT software Spectrum Lab

RFinder Worldwide Repeater Directory - The only worldwide amateur radio repeater directory. Supports Android, iPhone, web, RT Systems, CHIRP GPS enabled. AvMap, Garmin, TomTom

Yaesu.com : FT DX 3000D - Official page at Yaesu website of the Yaesu FT DX 3000D HF transceiver

Microsat - Ham radio shop for APRS digipeaters WX3in1, RPTC, GSM devices, SDR software defined radio producrsa, APRS trackers and GPS Receivers based in Poland

Cetina Front Panel Designer - Cetina Front Panel Designer is a free software to design Front Panel and electronic device and equipment

DxSpot - DxSpot is your mobile access into the Amateur Radio DX cluster network. With DxSpot you can connect to the DX cluster of your choice. The internal database supplies the connection parameters to over 300 DX clusters. Once connected enjoy formatted table views of DX spots, DXCC information, connected users, cluster announcements, colorized WWV propagation data, and keep current with the latest DX news.

811 Linear Amplifier project - A lower power desktop linear with integrated 120vac power supply. This, very compact, dual 811 version will deliver about 300 watts output. Covers all bands including WARC bands.

Notch Filter Designer - Online calculator, Butterworth Bandstop (Notch) Filter Designer

Constant k Lowpass Filter Design - Online Constant - k Lowpass Filter calculator

Homebrew Crystal Filter Design - Desgining crystal filters and find out crystal data by measuring it.

Highpass filter calculator - Butterworth Highpass Filter Designer

LF Converter - Home made LF converter, listen to signals below 300 KHz

PETH-40-HAM - +/- 15 V, 1.5 A power supply project

SWR calculator - Online VSWR Voltage Standing Wave Ratio Calculator