Thank you Karel. Similar problem here in NA involving Broadcast station harmonics. *Bob W9EWZ*
On Tue, May 26, 2026 at 9:15 PM Karel via Topband <[email protected]> wrote: > For many years on Top Band I have noticed one recurring problem which is > becoming more and more significant, especially for stations using > traditional receiving systems. > A large amount of industrial QRN, heterodynes, birdies and various > spurious carriers appear exactly on round kHz frequencies such as 1825.0, > 1826.0, 1827.0 etc. Unfortunately, many DX stations also choose these exact > frequencies when calling CQ. > During my years on 160m I have lost several rare and potentially new DX > QSOs only because the DX station happened to operate exactly on one of > these whole-kHz frequencies where local industrial heterodynes made > reception extremely difficult or even impossible. > I would therefore like to kindly ask DX stations to consider using > slightly offset frequencies when calling CQ on Top Band, for example > 1825.3, 1826.7, 1829.4 etc., instead of exact integer frequencies. > This is especially important for those of us who still use the traditional > way of receiving — our own antennas, local receiving arrays and real > on-site receivers — rather than remote SDR receivers located hundreds or > thousands of kilometers away in electrically quiet locations. > Today, a large number of DXers use remote SDR systems for reception, and > naturally they often do not hear the same local industrial noise and > heterodynes that many traditional stations still have to fight every night > on 160m. > A small frequency offset may seem insignificant, but in practice it can > make the difference between a readable signal and a completely lost QSO. > Thank you very much to everyone who takes this into consideration and > helps keep Top Band enjoyable and accessible also for stations using > classic receiving methods and local antennas. > 73 > Karel OK1CF > > _________________ > Searchable Archives: http://www.contesting.com/_topband - Topband > Reflector > _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
