Concur ..... if a frequency either ends with a zero, or if you add the digits up and get a number divisible by 9, it will likely have a greater change for BC interference.
Example in Tampa (Florida, US) is 1860, which is the 3rd harmonic for WDAE 620, which is a 50kW stn. An example for our UK friends is 1818, which is the 2nd harmonic for 909khz (BBC Radio 5).................... Great discussion! 73 de Lee KX4TT -----Original Message----- From: Topband [mailto:[email protected]] On Behalf Of Mike Waters Sent: Monday, 12 November, 2018 13:27 To: [email protected] Cc: topband <[email protected]>; Filipe Lopes <[email protected]> Subject: Re: Topband: 160m Condx Perfect! Thanks for sharing. 73, Mike www.w0btu.com On Mon, Nov 12, 2018 at 12:13 PM VE6WZ_Steve <[email protected]> wrote: > Know bad frequencies- great resource here: > http://www.k8nd.com/TopbandBadFreqs.pdf > > However…a “best practice” on 160m is NEVER call CQ on an exact frequency. > Why is it ever necessary to call on 1830, 1820, 1822 etc. exactly? > Call CQ on 1820.3, or 1820.4 or 1822.6 or 1827.8. > Perhaps its human nature to want to use a nice “round” number, but > this accomplishs nothing except increase the chances of being on a harmonic > QRG. > Its surprising how many DX-peds will do this too. We don't need a > nice frequency with no decimal points! You will be found just fine > with all the skimmers and spotters out there. > > de steve ve6wz. > > > > On Nov 12, 2018, at 9:31 AM, Filipe Lopes <[email protected]> wrote: > > Hi > > Is there a listing of such frequencies? Want to avoid those in the > coming contests > > 73's Filipe > CT1ILT CR5E CR6K > > Sent from my Huawei Mate 8 > > Na(o) Seg, 12 de nov de 2018, 17:28, Mike Waters <[email protected]> > escreveu: > > I wish we could get the word out to avoid frequencies like that: 1810, > 1820, 1830, etc. There are almost always AM BC harmonics on those freqs. > > 73, Mike > www.w0btu.com > > On Sun, Nov 11, 2018 at 4:24 PM k1zm--- via Topband < > [email protected]> > wrote: > > > Band still down a bit from last week but 4k6fo good sigs now on 1830.0 > from Alim. > 73 JEFF > _________________ > Searchable Archives: http://www.contesting.com/_topband - Topband > Reflector > > _________________ > Searchable Archives: http://www.contesting.com/_topband - Topband > Reflector > > _________________ > Searchable Archives: http://www.contesting.com/_topband - Topband > Reflector > > > _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector --- avast! Antivirus: Inbound message clean. Virus Database (VPS): 181111-16, 11/11/2018 Tested on: 11/12/2018 1:28:35 PM avast! - copyright (c) 1988-2018 AVAST Software. https://www.avast.com/antivirus --- avast! Antivirus: Outbound message clean. Virus Database (VPS): 181111-16, 11/11/2018 Tested on: 11/12/2018 1:57:44 PM avast! - copyright (c) 1988-2018 AVAST Software. https://www.avast.com/antivirus _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
