Nelson Antennas 2m rollup antenna review
Review of the smallest portable 2m antenna on the market producing full size dipole performance and stows into your pocket.
portable
BOB, the battery operated “beacon” for APRS
I built a prototype APRS beacon, dubbed Thor Hammer (big), to test back-packable APRS 2m beacon concepts.
Antenna radiator decoupling stub flub?
Measurements and analysis suggest why quarter-wave stubs fail to completely isolate radiator conductors on multi-band antennas including the popular rollup 2m/440 J-Pole products. Possible improvements are shown.
KX4O 1B-Battery VA Field Day 2015
Despite a weak battery and few contacts, our 1B-Battery effort verifies a 40m small-loop and packet-radio NTS messaging using quick deploy antennas.
KX4O/P VQP 2015 Expedition from MPX
Operating QRP portable from the back of a Subaru during activation of the rare VQP city of Manassas Park (MPX).
Build this Vertical Portable HF Antenna
The Asymmetrical Hatted Vertical Dipole (AHVD) prototype is an easy to build, portable alternative to other freestanding vertical HF antennas such as the Buddipole.
EFHW LNR Precision EF-10/20/40MKII Examination
The background and details of the LNR (Par Electronics) EF-10/20/40 end fed half-wave multi-band portable HF antenna. Come see what’s inside the mysterious “black box.”