After three years of mobile operation, I review the Diamond Antenna NR770HBNMO with appropriate K515SNMO mount including pattern measurements.

The post Diamond Antenna NR770HBNMO with K515SNMO mobile antenna review appeared first on Ham Radio . Magnum Experimentum.

Much has been said about the electrical disadvantages of using a magnetic mount for your VHF/UHF mobile needs. Measurements compare the magmount to a thru-hole NMO mount.

The post VHF magmount vs. hole-mount performance comparison appeared first on Ham Radio . Magnum Experimentum.

I built a prototype APRS beacon, dubbed Thor Hammer (big), to test back-packable APRS 2m beacon concepts.

The post BOB, the battery operated “beacon” for APRS appeared first on Ham Radio . Magnum Experimentum.