[UK-CONTEST] BCI on 7020

[G3SJJ]

Thanks Clive. I was just trying to point out though that I have never 
suffered from IMD problems on the FT1kMP so I don't think that Russian 
broadcast was my problem. More likely mal-adjustment of their tx. Maybe 
it had disappeared by the time you listened, it wasn't audible when I 
received your posting.

The only time I have heard more signals than I should was a few weeks 
back on 160 when GW3JXN was audible 7KHz above and below his main 
signal. Even GI3OQR doesn't do that to my rx so again I don't think it 
was the MP.

Chris G3SJJ


Clive Whelan wrote:

>Nope, I've got a good one!
>
>IMD3 requires TWO signals to produce the sprog., as detailed in the maths
>below. If for you say, G3NKC is on 7010 and a.n.other is on 7015 with an
>equally gignormous signal, you might hear "headless chickens" on 7005 and
>7020. If this sounds familiar, reduce your front end gain, and the sprogs
>will disappear quickly. If the offenders however are on 7010 and 7012, then
>probably no roofing filter is going to help, and gain tailoring is
>mandatory.  Alternatively get an IC7800 or FT9000 :-0
>
>The sig. you refer to is the LF part of an idling teletype, you can hear the
>HF signal almost exactly 1khZ HF of that. The origin is probably closer to
>NE than E, but my antenna is not that sharp to be honest. 10kW+ doing
>nothing, so much for environmental awareness eh :-((
>
>
>73
>
>
>Clive
>GW3NJW
>
>
>
>-----Original Message-----
>From: uk-contest-bounces at contesting.com
>[mailto:uk-contest-bounces at contesting.com]On Behalf Of G3SJJ
>Sent: 13 January 2006 20:12
>Cc: UK Contest Reflector
>Subject: Re: [UK-CONTEST] BCI on 7020
>
>
>Can we swop receivers?   7017.68 = funny noise, 20 over s9, to the East.
>
>Chris JJ
>
>
>
>Clive Whelan wrote:
>
>  
>
>>JA1CQR is there now( 19:20), 549 no BCI
>>
>>
>>GW3NJW
>>
>>-----Original Message-----
>>From: uk-contest-bounces at contesting.com
>>[mailto:uk-contest-bounces at contesting.com]On Behalf Of Clive Whelan
>>Sent: 13 January 2006 19:11
>>To: UK Contest Reflector
>>Subject: Re: [UK-CONTEST] BCI on 7020
>>
>>
>>2*7120-7220=7020  IMD3?
>>
>>Gignormous Russian speaking station on 7220
>>
>>
>>73
>>
>>
>>Clive
>>GW3NJW
>>
>>-----Original Message-----
>>From: uk-contest-bounces at contesting.com
>>[mailto:uk-contest-bounces at contesting.com]On Behalf Of G3SJJ
>>Sent: 13 January 2006 16:21
>>To: UK Contest Reflector
>>Subject: [UK-CONTEST] BCI on 7020
>>
>>
>>Anyone hearing the FM stuff on 7020. Definitely from the East, I seem to
>>detact Russian but Fred K3ZO says it sounds Portugese maybe from Brazil.
>>In which I wouldn't think it was a harmonic! We are being tageted more
>>and more by non amateur stuff in this band.
>>
>>Chris G3SJJ
>>_______________________________________________
>>UK-Contest mailing list
>>UK-Contest at contesting.com
>>http://lists.contesting.com/mailman/listinfo/uk-contest
>>_______________________________________________
>>UK-Contest mailing list
>>UK-Contest at contesting.com
>>http://lists.contesting.com/mailman/listinfo/uk-contest
>>_______________________________________________
>>UK-Contest mailing list
>>UK-Contest at contesting.com
>>http://lists.contesting.com/mailman/listinfo/uk-contest
>>
>>
>>
>>    
>>
>_______________________________________________
>UK-Contest mailing list
>UK-Contest at contesting.com
>http://lists.contesting.com/mailman/listinfo/uk-contest
>
>_______________________________________________
>UK-Contest mailing list
>UK-Contest at contesting.com
>http://lists.contesting.com/mailman/listinfo/uk-contest
>
>  
>