Antenna Building:

http://www.qsl.net/kf4cpj/qha/ - Quadrifilar Helical

http://www.amsat.org/amsat/articles/w6shp/lindy.html - The Lindenblad

http://jcoppens.com/ant/qfh/calc.en.php - Quadrifilar Helical design and calculator

http://techdoc.kvindesland.no/radio/vhf_antennas/20061030163006789.pdf - The J-Pole revisited!

http://www.rason.org/Projects/collant/collant.htm - High gain, omni directional coaxial co-linear design

http://www.qsl.net/dk7zb/Duoband/open-sleeve.htm - Excellent VHF/UFH Yagi designs

 

Local ARES/RACES

https://www.hmcraces.org/BB/

http://www.madisoncountyema.com/races.htm

 

Propagation prediction mapping:

http://qradiopredict.sourceforge.net/

http://ham.stackexchange.com/questions/1921/how-do-i-make-a-rf-propagation-map-for-a-repeater

 

DMR:

www.taitradioacademy.com/topic/what-is-dmr - Radio Academy "Intro to DMR"

www.trbo.org/docs/Amateur_Radio_Guide_to_DMR.pdf - Guide to DMR

www.dmr-marc.net - DMR Motorola Amateur Radio Club

www.dmr-marc.net/sandbox.html

www.dmrassociation.org - Digital Mobile Radio Association

www.hytera.us

http://tyterausa.com

 

 

Allstar Link

www.allstarlink.org - Allstar Link Official website

http://www.crompton.com/hamradio/BeagleBoneBlackAllstar/ - Allstar how-too's and download for the WA3DSP ARM-ALLSTAR image for the Rpi

 

Emergency Preparedness and Winlink 2000 Radio eMail

http://www.winlink.org/ - Winlink 2000 Radio eMail System Official website

http://aprs.fi/#!lat=34.66850&lng=-86.55760 - live aprs map for Huntsville AL.

http://www.pigate.net/ - Winlink 2000 client for the Raspberry Pi

https://alertfind.com/amateur-radio-and-emergency-communications/

https://couponfollow.com/research/disaster-preparedness-on-a-budget

 

Misc.

http://www.qsl.net/g4wpw/date.html - Microphone pinouts