Most popular questions

63 Why is Morse code still in use? 2013-10-22T23:07:22.997

49 How do I report an emergency using ham radio? 2013-10-22T20:29:20.920

39 Using a balun with a resonant dipole 2013-11-04T23:02:11.077

37 Why do hams often conclude messages with "73"? 2013-10-25T18:50:52.633

36 What's the difference between national calling frequency and national simplex calling frequency in the 2m and 70cm band plans published by ARRL? 2014-02-13T17:05:52.100

34 Effect of different metals for antenna elements 2014-02-05T19:13:55.457

33 Can my neighbor's ham radio antenna be interfering with my internet signal or is my internet provider just throwing blame elsewhere? 2016-11-27T20:00:20.743

31 Are there well-known methods that can help improve my CW copying speed? 2013-10-22T20:07:48.607

29 Can I reduce RFI/noise at the antenna? 2013-11-07T17:27:42.133

27 What's a cost-effective way to boost the range of my cheap 2m/70cm handheld? 2013-10-22T19:57:28.037

27 What is a link budget, and how do I make one? 2013-10-25T21:43:24.660

26 Which HF bands are best during the day and which are better at night? 2014-05-03T03:09:38.790

25 How can one convert from Lat/Long to Grid Square? 2013-10-23T12:24:04.597

24 Encrypted traffic and amateur radio 2013-10-22T20:43:36.913

24 Is there a way to listen to live HF communications using the internet? 2013-10-24T21:29:00.270

24 What is the relationship between SWR and receive performance? 2013-10-27T15:01:33.217

24 Why are some 1:1 current baluns twice as complicated as others? 2016-05-04T07:04:24.807

23 How do Handheld antennas work without ground? 2013-11-01T01:42:18.370

23 How can I avoid accidentally transmitting with a Baofeng UV-5R? 2015-06-01T15:39:58.083

22 What is the body of knowledge the U.S. written exams test? 2013-11-21T03:17:37.947

22 What makes a 5/8 wavelength vertical desirable? 2013-12-21T13:21:57.033

21 Why do we use LSB below 10 MHz and USB above 10 MHz when operating SSB HF? 2014-01-29T00:31:12.807

21 Is "just listening" on EchoLink considered bad etiquette? 2014-03-26T18:12:36.970

20 What antenna on a BaoFeng UV-5R Pro will give me better reception? 2014-02-17T01:57:55.287

20 Can I build a radio telescope out of a parabolic TV satellite dish? 2018-08-08T09:21:00.743

19 How can I protect equipment against a lightning strike? 2013-10-22T20:22:09.903

19 If I hear a distress call, what is the correct procedure for helping the person? 2013-11-28T00:18:56.080

19 What makes cellphone transmissions so energy cheap? 2013-12-04T21:48:06.417

19 What information should be on a QSL card? 2013-12-16T09:31:43.567

19 SDR: Quadrature demodulation vs direct RF sampling 2014-01-05T06:48:06.320

19 Using a Morse code key with a computer? 2014-01-17T16:49:25.873

19 How to detect common-mode currents or “RF in the shack”? 2014-01-22T20:36:59.570

19 How does the signal know where the cable ends and the antenna starts? 2018-11-06T19:38:21.613

18 Why do I need to tune an antenna? 2013-10-22T20:23:27.223

18 How does moving a feedpoint off-center in a dipole affect the resonant frequency and resistive load? 2013-10-22T21:15:06.167

18 SDR sampling bandwidth - do the bits per sample matter? 2013-11-07T17:39:40.107

18 Why do folded dipoles have greater bandwidth than ordinary resonant dipoles? 2013-11-22T12:38:10.260

18 I hate contests. How can I avoid them? 2013-12-20T16:28:21.113

17 Should I chose a vertical or a horizontal HF antenna? 2013-10-22T23:18:56.293

17 What defines music, per amateur radio regulations? 2013-10-26T00:55:56.853

17 Ham radio above 275 GHz 2013-11-02T01:23:06.353

17 Using my Baofeng UV-5R to talk to walkie talkies 2013-11-08T15:29:41.727

17 How do emergency nets work? 2013-11-10T16:13:00.423

17 What is a "random wire antenna"? 2013-11-14T14:25:54.363

17 How does a mag mount antenna achieve a ground plane? 2013-11-18T21:55:24.863

17 Why do repeaters use cavity filters? 2013-12-05T21:25:39.593

17 Understanding coax impedance 2014-01-23T18:58:51.280

17 What is the peak voltage at the tips of a dipole antenna? 2014-02-10T16:31:28.830

17 How does an SWR meter really work? 2018-01-24T00:24:17.303

16 Can a licensed ham use or modify CB equipment to work the 10 Meter Amateur bands? 2013-10-22T22:49:26.223