440 Mhz J-Pole Antenna plans
- Here is a 70cm (440 Mhz) J-Pole antenna that is inexpensive, and easy to build. Author use 1/2 inch copper pipe, and the associated fittings necessary. The dimensions aren’t typical however, this is what it took to get its SWR low.
Feeding an End-Fed Antennapop
- End-Fed antennas are NOT balanced systems; but neither are verticals, ground planes, discones, windoms, zepps, Marconis, half-slopers, et al. Additionally, the low-impedance antenna port of your transmitter/receiver is not balanced.
Short radials for ground-plane antennas
- Think your elevated radials always have to be full size? N6LF lets you in on some great ideas to lessen the â€świngspanâ€ť of radials, especially near the beach.
European 135.7 - 137.8 kHz Band Plan
- This is not an officially recognized band plan for the European LF allocation between 135.7 and 137.800 kHz. This plan just contains my own observations and shall help the newcomer to get some orientation on where to find what.
US Band Plan by ICOM
- ICOM USA Amateur Radio HF VHF/UHF band plan updated to 2008, include a Common Country prefixes in PDF Format
- Have you ever wondered where different modes should be operated, what frequencies to avoid as a courtesy like SSTV etc? This site offer a database for known net frequencies,known segments for different modes, known beacons
- PlanePlotter receives and decodes live digital position reports from aircraft and plots them on a chart.
Using PlanePlotter, you can see a radar-like display of all those aircraft around you that are transmitting the appropriate digital messages including ACARS, ADS-B and HFDL.