swmopacket.org

Shopping and Services/QSL Printing
Products include Photo QSL cards, Eyeball cards, and State QSL Cards, based in Hampstead, MD USA

Operating Aids/Maps
US Contesters maps generated based on ARRL online score data by WM5R

Shortwave Radio/SWL Resources
Article collection about shortwave listening, including number stations, tty fax reception samples, utility stations examples, navy and military morse metworks documention

Operating Modes/Radio Direction Finding
History of Radio Direction Finding, performance and limitation of RDF Systems, RDF for non professional use

Internet and Radio/Sounds
About numbers stations, and their criptic transmissions, where to listen to them and some audio recording samples by fascinating shortwaves

Antennas/Mobile
This is a combination center and top loaded multiband antenna by Mark D. Lowell, N1LO PDF File

Antennas/20M
9Y4DD’s Dave 14 Mhzhomebrew MOXON antenna

Antennas
This article by Seabury Lyon, AA1MY describe how homebrew kits for amateur radio pourposes, in order to support wire antennas

Ham Radio/Clubs/North America/USA/Michigan
Not-for-profit, Michigan fraternal organization.

Ham Radio/Clubs/North America/USA/Michigan
Employees and retirees of General Motors Corporation

Antennas/Tuners
A simple antenna tuner for 4m by Tony Hawker G4CJZ

Technical Reference/Software Defined Radio
SDR project based on a TI AFREDI8201 chipset with both ADC and DDC functions.
This SDR needs no external PC and is a RX only.

Antennas/20M
A 20 and 40 meter vertical on Autopilot by K6MHE PDF File

Ham Radio/Clubs/North America/USA/Michigan
Niles, Michigan USA

Ham Radio/Clubs/North America/USA/Michigan
From the Upper Peninsula of Michigan along the southern shore of Lake Superior