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1. LF: Strange signal 500khz (score: 1): Author: "Gary - G4WGT" <[email protected]>; Date: Sat, 30 Sep 2006 20:00:30 +0100; Hi All, I now often check around 500KHz for what is going on, I usually see on SpecLab (sometimes hear) a continuous carrier very near to 500KHz. On looking/listening tonight the signal frequency is; /rsgb_lf_group-archives/html/rsgb_lf_group/2006-09/msg00160.html (8,372 bytes)
2. RE: LF: Strange signal 500khz (score: 1): Author: "james moritz" <[email protected]>; Date: Thu, 5 Oct 2006 13:47:21 +0100; Dear Gary, LF Group, Perhaps the same TV channel switching between video sources with slightly different line scan frequencies? Cheers, Jim Moritz 73 de M0BMU --Original Message-- From: owner-rsgb_lf; /rsgb_lf_group-archives/html/rsgb_lf_group/2006-10/msg00287.html (12,109 bytes)
3. Re: LF: Strange signal 500khz (score: 1): Author: "Alan Melia" <[email protected]>; Date: Thu, 5 Oct 2006 13:06:40 +0100; Hi Gary, I dont know how they work but I would suggest the digibox is deriving a linescan rate from the received digital TV signal periodically and it applying that to the analogue signal it generate; /rsgb_lf_group-archives/html/rsgb_lf_group/2006-10/msg00288.html (11,212 bytes)
4. RE: LF: Strange signal 500khz (score: 1): Author: "Gary - G4WGT" <[email protected]>; Date: Thu, 5 Oct 2006 12:43:36 +0100; Hi Alan, Markus & LF, Here is an interesting result, I wrote :- " I believe that the stepping effect is probably due to the "Freeview" digi-box because the TV is an older analogue model & I would exp; /rsgb_lf_group-archives/html/rsgb_lf_group/2006-10/msg00289.html (12,309 bytes)
5. RE: LF: Strange signal 500khz (score: 1): Author: "Gary - G4WGT" <[email protected]>; Date: Thu, 5 Oct 2006 11:52:44 +0100; Hi Markus, Not so monitored, I watched 500KHz last night deliberately around the time my wife switched the set on therefore proving it was my own TV. I believe that the stepping effect is probably du; /rsgb_lf_group-archives/html/rsgb_lf_group/2006-10/msg00290.html (12,581 bytes)
6. Re: LF: Strange signal 500khz (score: 1): Author: [email protected]; Date: Thu, 05 Oct 2006 05:52:50 -0400; Gary, interesting - one of your family members seems to be switching channels rapidly ;-) During my LORAN monitoring, I often saw a grid pattern which didn't average out in 5 minutes or longer integr; /rsgb_lf_group-archives/html/rsgb_lf_group/2006-10/msg00291.html (11,942 bytes)
7. Re: LF: Strange signal 500khz (score: 1): Author: "Alan Melia" <[email protected]>; Date: Wed, 4 Oct 2006 22:18:59 +0100; Hi Gary Thanks for that information. It confirms the comments I made earlier when we started to think about 600m possibilities. I suggested that we avoid 500kHz exact because of this possible problem; /rsgb_lf_group-archives/html/rsgb_lf_group/2006-10/msg00292.html (10,534 bytes)
8. RE: LF: Strange signal 500khz (score: 1): Author: "Gary - G4WGT" <[email protected]>; Date: Wed, 4 Oct 2006 19:30:24 +0100; Hi Alan & LF, I checked out the strange stepped signal on 500KHz & sure enough it is my own TV set downstairs. 73 Gary - G4WGT. Hi Tom 500kHz is 32 times the 15.625kHz line frequency for 50Hz framing; /rsgb_lf_group-archives/html/rsgb_lf_group/2006-10/msg00293.html (10,743 bytes)
9. Re: LF: Strange signal 500khz (score: 1): Author: [email protected]; Date: Mon, 02 Oct 06 16:59:45 +0200; Hi Alan, many thanks for that info! Looks if I would have a simple 500kHz QRPPP "TV set on/off"-CW TX if we will get 500 kHz...hi At least for 100-200 m that would be "good enough" for QRSS10 or so; /rsgb_lf_group-archives/html/rsgb_lf_group/2006-10/msg00295.html (9,458 bytes)
10. Re: LF: Strange signal 500khz (score: 1): Author: "Alan Melia" <[email protected]>; Date: Mon, 2 Oct 2006 14:50:38 +0100; Hi Tom 500kHz is 32 times the 15.625kHz line frequency for 50Hz framing TV sets. That is why I suggested to the RSGB representative that we do not ask for an allocation at 500 exactly !! I remember t; /rsgb_lf_group-archives/html/rsgb_lf_group/2006-10/msg00296.html (10,739 bytes)
11. Re: LF: Strange signal 500khz (score: 1): Author: [email protected]; Date: Mon, 02 Oct 06 15:24:04 +0200; Hi, I don't know if it's the same. I have on 500 kHz an unid signal from TV sets. It's not only mine but also from the neighbourhood. I always know when they went to bed ;-) First I thought if came v; /rsgb_lf_group-archives/html/rsgb_lf_group/2006-10/msg00297.html (9,369 bytes)

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