south gate ca

144MHz Slim Jim antenna - 2 Meter band Slim Jim antenna using a 300 Ohm ribbon cable

A 40m Vertical - This antenna is intended as a simple, inexpensive solution for the newcomer to experiment across the 40m band (7.0–7.2MHz) when only restricted space is available

Bazooka dipole for 70 cm band - Here is a very simple 70cms dipole from Harald PD2HFE, which uses a single piece of RG-213 coaxial cable 34 cms in length.

Coiled Coax Choke Balun - A very practical Balun for aerial work is the choke type

Antenna system in a shopping trolley wally - Multiband portable antenna system edited by Andy Foad G0FTD, consisting of an old cb antenna with it's 27Mhz matching coil, an antenna tuner, car battery and a transceiver

2m 4-element Quad you can build - A 2m 4-element quad antenna that you can build easily

G0FTD's experimental INDiX antenna - This antenna is meant to be hung indoors within a window frame for those who can't get an outdoor antenna erected. Plan include dimensions for 50mhz 70Mhz and 144Mhz

Bromley Repeater Group - Gateway - Website and Forums of The Bromley Repeater Group which has been formed to launch and maintain the new Kent repeater, GB3OK. Located in Orpington and with an ASL of 600 feet, it's predicted to provide coverage over a large area of London and South East England. Also on Echolink node 280040

Southeastern Asterisk Radio Networks - Interoperability solutions via Asterisk based RF Gateways - Southeastern Asterisk Radio Network (SEARN) and the Southeastern Asterisk Amateur Radio Netwok (SEAARN) are designed for the purpose of developing interoperability capabilities amongst diverse communications systems. Digital Amateur Radio Project Association - DARPA expanding the digital experience.

Introduction to Data Communications - Roger Cooke G3LDI article on Data Communication modes

Transistor PA Biasing - Here is a simple circuit that can deliver the peak base current needed for linear ssb operation

Transistor PA Biasing - Here is a simple circuit that can deliver the peak base current needed for linear ssb operation

Recovering old NICAD and NMHI Cells - Old Nicads batteries and sometimes NMHI batteries usually end up with several cells being short circuit, as they suffer from crystal growth in the electrolyte

FT290 CW KOX Circuit - This is not actually break-in but just KOX circuit. It can only be used on the CW mode otherwise it keys up the Tx

Big Dummy's Data Interface - Simple soundcard data interface for the various data modes

Oscilloscope Tester - Circuit to assist in the setting-up and calibration of oscilloscopes