Re: LF: Strange signal 500khz

["Alan Melia" <alan.melia@btinternet.com>]

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 this as in the early days of
personal computers we used to generate TV line sync by dividing a 1MHz
oscillator by 64.

Cheers de Alan G3NYK

----- Original Message -----
From: <dl8aam@9a0tcp.ampr.org>
To: <rsgb_lf_group@blacksheep.org>
Sent: 02 October 2006 14:24
Subject: Re: LF: Strange signal 500khz


> 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 via the AC net, but even when I
use
> batteries that 500 kHz TV signal is there. Even when I were on a
campground
> I was able to identify 2-3 TV sets from other campers. I don't know what
> exactly is responsible (inside the TV set system), but it came 100% from
them.
> Maybe that is also your "problem" ?
>
> 73, Tom - DL8AAM
>
>
>