Alan,
Thank you for your suggestions regarding tracking down the QRM, but this
morning the signal on 145 kHz is no longer there. What I have noticed is that
there is now an RTTY signal on 147 kHz about the same strength here as longwave
Radio 4.
I shall continue monitoring while recommissioning my 136 kHz softrock.
John F5VLF
> On 27 Nov 2016, at 11:22, John Rabson <[email protected]> wrote:
>
> I have just resumed monitoring 135 to 198 kHz and have noticed a fairly
> strong broad and constant signal on about 145 kHz which was not there last
> winter. It sounds rather like LORAN A (not C) but without the selective
> fading effects we used to get on 1.9 MHz. It appears to come from either
> north-east or south-west of my location in central Burgundy, but I have not
> yet managed to get a cross bearing.
>
> John F5VLF
>
>> On 26 Nov 2016, at 11:17, Chris Wilson <[email protected]> wrote:
>>
>> 26 November 2016
>>
>>
>> I have been monitoring my noise on my receivers and the big issue is a
>> constant, day and night, high level noise centred exactly on 144 kHz.
>> Is this a frequency that is familiar to anyone? Googling it has only
>> brought up comments of some 20kHz solar inverters talking to their
>> control panels down the mains wiring at 144 kHz, with some chatter
>> about inverters going noisy and blanking out their own talk back
>> frequency.
>>
>> My next door but one neighbour has solar panels on his stable roof,
>> but I don't THINK they have an accumulator bank, they just feed back
>> into the national grid. we don't really get on too well so I am loathe
>> to approach them unless I can be sure the noise is from there.
>>
>> There's also a huge, multi acre solar farm opened about 5 miles away.
>> I would imagine some old geezer with noise near his beloved LF Ham
>> band frequency would have little impact on its operation, so i hope
>> it's not tat. Any ideas on what uses 144 kHz, and how to locate the
>> source?
>>
>> Here's a screen shot of it as it is at the moment, but it doesn't
>> change, day or night, and its amplitiude stays pretty constant, no
>> turning on and off I have ever seen. My RX is on my TX aerial at the
>> moment.
>>
>> http://www.chriswilson.tv/noise.jpg
>>
>> Thanks
>>
>>
>> --
>>
>>
>> Best regards,
>> Chris 2E0ILY mailto:[email protected]
>>
>> My part time LF grabber is at
>> http://www.chriswilson.tv/grabber.html
>>
>>
>
> [email protected]
>
> Researching history of RABSON, BLACKSHAW, GAUNTLETT, VERLANDER and ROBSONNE
>
>
>
>
[email protected]
Researching history of RABSON, BLACKSHAW, GAUNTLETT, VERLANDER and ROBSONNE
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