hf propagation

Diplexer construction 2m/70cm and SW/VHF - Build your diplexer with more than 70db port isolation and less than 0.2db attenuation. Easy project.

6dB colinear VHF antenna  ^pop - Building details of a VHF colinear antenna with 6 db gain

HF mobile antenna  ^pop - Build your mobile antenna which outperforms Hustler by 10db and ATAS-100 by 18db. From 80 to 10m.

WincupHF - Contest manager programa for REF, ARRL 10m, ARRL DX, CQ WW, CQ WPX

Beacon VHF by Sezione ARI di LA SPEZIA - Italian beacon. Locator JN44WC in Monte Verrugoli (SP) 745 Mt asl

VHF DX Cluster mobile - VHFDX mobile dx cluster version

TPN/SB Amateur Radio Newsletter - A Weekly Canadian Amateur Radio Newsletter covering International, National, Provincial, Local Club News, DX, Propagation Forcast, Special Events and much more

Washington State Army MARS - Emergency Communications Support - FEMA, DOMS, and Homeland Security communications resources. Health and Welfare radiograms.

Twin City FM Club - Largest general-purpose ham radio club in Twin Cities. Three repeaters, fully equipped two position HF club station, contesting, field day, and more.

Nellis Radio Amateur Club - "Located at Nellis Airforce Base-Las Vegas, Nevada USA. Nellis RAC is a progressive radio club. Providing licensing classes, on-air code study group, vhf/uhf repeaters, emergency and public service communications, ""Aviation Nation"" Airshow Special Event Station N7V"

PA3FVB - Description of my mobile HF/VHF station

WaveNode Precision Station Monitoring - The WaveNode WN-1 is a precision, full-featured Amateur Radio Station Monitoring System which now includes Audio Announcing for RF power, SWR, and DC monitoring using HF and UHF remote sensors.

6 Meters Online - 6 Meters Online. A site for 6m enthusiasts with propagation reports, forums, webcams and more.

VHF UHF SHF Toplist - VHF UHF SHF Toplist including DXCC and EME-Initials

NAVTEX - The NAVTEX system is used for the automatic broadcast of localised Maritime Safety Information (MSI) using Radio Telex (also known as Narrow Band Direct Printing, or NBDP).

On-Line HF Propagation Prediction - *One single page* gives you an immediate overview of current shortwave propagation conditions at your location.

Baofeng UV3R comments - A Review of the Handheld VHF/UHF Transceiver with known problems and cool features

High Frequency - Radio frequencies for HF-GCS, ARINC, MWARA, and military stations

MultiPSK  ^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

HamCAP - A freeware HF propagation prediction tool, that interface the VOACAP tool by Alex VE3NEA

FTB8900 - Memory management (cloning) software for the Yaesu FT-8900R quad band FM mobile transceiver

Transistor Specifications - Transistor Specifications, ``RF Power Mosfets ¹ HF VHF transistors

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

F6BON Homebrew - Spectrum alalyzer, uhf shf test equipment

VHF CW Transmitter - Simple CW transmitter for the two meters band