DJ0WH: Antennas

Showing posts with label Antennas. Show all posts

Fundamentals: Working out ERP

Image: Marco Verch CC BY 2.0 I got asked this question on Facebook the other day and the answer was too long to type in the comments. ...

There is no such thing as a full-band mobile quarter-wave antenna on VHF. Anyone who is trying to sell you this idea is being dishonest (...

DP4801e with PMAD4119 Motorola portable two-way radios will either be supplied with a normal-mode helical (a.k.a. rubber ducky) or quar...

Here's a short quiz (10 questions) about a few obvious things we tend to forget about. Take the quiz by clicking here .

Which is better, a Hybrid Combiner or Cavity Combiner? Why would a high gain antenna be a bad choice? Why is there interference on my r...