yamaha m4

Bean Tin Antenna for 15 m - GM4BKV article on how to recycle our rubbish and produce a cheap and effective 15m antenna into the bargain

Dual band 6m/4m Yagi - This antenna was optimized with the goal to minimize any changes in 6jxx6 impedance/lobes. The result is a 7 el on 70 MHz with a little loss of gain comparing with the other monobands of the same lenght.

Build A Magnetic Loop  ^pop - Documents and schema on how to build a Magnetic Loop Antenna fo 80/30 mtrs

GM4XRF Loop antenna plan - A motor driven magnetic loop antenna 1.5 meters square for 3.5-10MHZ by GM4XRF

The Guanella 1:4 balun - A cost effective current-mode 1:4 balun can be constructed from two lengths of coax, two ferrite rods, some electrical tape, cable ties, a length of PVC water-pipe and some connectors. This form of 1:4 current-mode balun is named after G. Guanella.

Short 40m dipole - The GM4JMU Shortened 7Mhz Dipole

40m Short Antenna  ^pop - GM4JMU shortened dipole for 40 meters band

KM4M Northern Neck Contest Club (NNCC) - Northern Neck Contest Club

N9YDZ Beacon - N9ydz beacon brighton, illinois, grid square em48 on 28.210 Mhz

9M4SLL Spratly - An international team will activate Spratly Isl. 10-18 March 2013

3905 Century Club Nets - Worked all states and awards net that has been operting since 1977. Eleven nets on four bands, working SSB, CW, RTTY and PSK.

SM4DHF Logbooks Collections - Links to more than 400 amateur radio logbooks on Internet.

SM4INV Per-Arne - SM4INV's personal web site

GM4CXM Ray  ^updated - Home page of the Amateur Radio station of GM4CXM located near Glasgow in Scotland. Dedicated to VHF and microwave operations

Microwave audio samples - 10GHz Rainscatter audio files

The Ventenna - Rugged, disguised 2m, 220MHz, 440MHz, and 2m/440 dual band antennas, HF portable antennas, portable dipoles.

GM4JJJ VHF and EME pages - GM4JJJ, David with EME on 144 MHz and Astronomy.

Pc interface cable for Kenwood TH-F7E / TH-F6A - Implementation by SM4XDJ, Sweden

Smith Chart Software - SimSmith is a highly interactive, real time Smith chart graphing program. Circuits are constructed using drag-n-drop. Load files can be imported from the EZNEC and CocoaNEC antenna simulation software and from the AIM4170 and miniVNApro antenna analyzers. Circuits and load files can be of any size. Key Features: SimSmith is one of the few Smith chart packages which models transmission line losses. SimSmith also allows the description of circuit elements using algebraic equations. SimSmith has only one screen and allows the screen to be resized to increase workspace or readability.

RTPDir bridge software - rtpDir: rtpDir_for_EchoLink_and_IRLP RTPDir bridge software(Real Time Protocol Director). It can be used on the Amateur bands, Government, commercial and private nets, or direct user to user without any radios connected.

iDXSpot - DX Spots announced by speech in phonetics (or plain). Connect to the worldwide DX-Cluster via the Internet easily. Calculates distance and bearing between Grid locators and sends Grid & distance. Hot buttons to see DX-Spots on specific bands. Editable Hot buttons. Easy switching between favourite DX-Clusters.

MacEME - Realtime moontracking for moonbounce enthusiasts EME

MoonSked - Moon tracking for Mac and Windows for EME

TCalc - TCalc+ analyses the Noise and intermodulation performance of radio receiver front-ends.

SV1BSX Homebrew Corner - Offer a wide range of homebrewing projects mainly for VHF UHF operations. From vhf antennas to preamplifiers, chargers and power supplies