grid location

Baluns on Log Periodic Antennas - Some antenna manufacturers place baluns at the incorrect location in LPDA arrays, or tell you to route the cable incorrectly. This can cause substantial RFI and all sorts of weird problems like RF into house wiring.

N1KXR/B - Ten-Meter Propagation Beacon - N1KXR/B went on the air at 21:00 Hours EST on Saturday, November 22, 2008 and has been in continual operation. Located in Northampton, Massachusetts [USA] (grid square: FN32), it transmits 24/7/365 and is coordinated with the IARU Region 2 HF Beacon Coordinator.

Listen to National Hurricane Center Skywarn Nets - Live audio of the National Hurricane Center’s Skywarn Nets. This live feed covers several different states, and locations throughout the US including: TX, LA, MS, AL, FL, GA, SC, NC, VA, MD, DE, PA, NJ, NY, CT, RI, MA, VT, and ME

PeakSolar.com - Solar Panels, Grid Tie Systems, Solar Power Kits, Solar Cells and more.

ARRL Amateur Radio Map of North America - This large, colorful wall map features current geographic detail and labels, grid squares, call sign prefixes, boundaries and more.

International 70 MHz allocation - Allocation of 4 meter band worldwide

Repeater Ideas - This illustrate having a high elevation receiver input for a limited low elevation transmit location.

UHF VHF Repeaters in Italy - List of VHF UHF ham radio repeaters in italy with frequencies and locations

Ameritron AL-811H Tuning - Ameritron Al-811H Tuning for Power/Dissipation/Linearity, and More Generally 811A Tube Amps in Grounded Grid