Topband: 160m Condx

[Lee. KX4TT]

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:topband-bounces at contesting.com] On Behalf Of Mike Waters
Sent: Monday, 12 November, 2018 13:27 
To: ve6wz at shaw.ca
Cc: topband <topband at contesting.com>; Filipe Lopes <ct1ilt at gmail.com>
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 <ve6wz at shaw.ca> 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 <ct1ilt at gmail.com> 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 <mikewate at gmail.com>
> 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 < 
> topband at contesting.com>
> wrote:
>
>
> Band still down a bit from last week but 4k6fo good sigs now on 1830.0 
> from Alim.
> 73 JEFF
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