One should always avoid frequencies ending in a multiple of 10 for the America's and 9 khz multiples for the rest of the world.
On Thu, Nov 20, 2025 at 9:25 PM Karel Matousek <[email protected]> wrote: > Hi, > > I would like to make a small suggestion regarding CQ calling practices on > 160 meters. Many stations tend to call CQ exactly on whole-number > frequencies, such as 1812.0 kHz, 1822.0 kHz, and similar. Unfortunately, > these exact integer frequencies are often affected by various industrial > noise products and spurious tones, which makes it very difficult to copy > weak signals. > > A simple solution would be to move just a little off these whole-number > frequencies—even 100 Hz up or down is usually enough to avoid the > interference. This small shift can significantly improve the ability to > hear weak stations. > > 73, DX Karel OK1CF > > _________________ > Searchable Archives: http://www.contesting.com/_topband - Topband > Reflector > _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
