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Long-wave close down

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  Long-wave close down Scott <newsgroups@gefion.myzen.co.uk> - 2026-06-27 17:40 +0100
    Re: Long-wave close down JMB99 <mb@nospam.net> - 2026-06-27 18:29 +0100
      Re: Long-wave close down Scott <newsgroups@gefion.myzen.co.uk> - 2026-06-27 19:49 +0100
    Re: Long-wave close down liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-06-27 19:35 +0100
    Re: Long-wave close down Max Demian <max_demian@bigfoot.com> - 2026-06-28 09:59 +0100
      Re: Long-wave close down Max Demian <max_demian@bigfoot.com> - 2026-06-28 10:33 +0100
        Re: Long-wave close down "J. P. Gilliver" <G6JPG@255soft.uk> - 2026-06-28 12:47 +0100
          Re: Long-wave close down Charles Hope <clh@candehope.me.uk> - 2026-06-28 13:45 +0000
            Re: Long-wave close down "J. P. Gilliver" <G6JPG@255soft.uk> - 2026-06-28 18:44 +0100
              Re: Long-wave close down Rink <rink.hof.haalditmaarweg@planet.nl> - 2026-06-30 23:06 +0200
        Re: Long-wave close down Max Demian <max_demian@bigfoot.com> - 2026-06-30 13:24 +0100
      Re: Long-wave close down Charles Hope <clh@candehope.me.uk> - 2026-06-28 09:45 +0000
        Re: Long-wave close down Scott <newsgroups@gefion.myzen.co.uk> - 2026-06-28 15:58 +0100
          Re: Long-wave close down John Williamson <johnwilliamson@btinternet.com> - 2026-06-28 16:14 +0100
            Re: Long-wave close down liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-06-28 18:11 +0100
              Re: Long-wave close down John Williamson <johnwilliamson@btinternet.com> - 2026-06-28 21:56 +0100
                Re: Long-wave close down liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-06-28 22:59 +0100
                  Re: Long-wave close down tony sayer <tony@bancom.co.uk> - 2026-06-29 22:46 +0100
                Re: Long-wave close down Charles Hope <clh@candehope.me.uk> - 2026-06-29 08:15 +0000
                  Re: Long-wave close down liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-06-29 09:37 +0100
                    Re: Long-wave close down Andy Burns <usenet@andyburns.uk> - 2026-06-29 20:17 +0100
                      Re: Long-wave close down "J. P. Gilliver" <G6JPG@255soft.uk> - 2026-06-29 23:40 +0100
                        Re: Long-wave close down tony sayer <tony@bancom.co.uk> - 2026-06-30 00:38 +0100
                          Re: Long-wave close down JMB99 <mb@nospam.net> - 2026-06-30 07:46 +0100
                        Re: Long-wave close down liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-06-30 09:04 +0100
                          Re: Long-wave close down "J. P. Gilliver" <G6JPG@255soft.uk> - 2026-06-30 09:39 +0100
                            Re: Long-wave close down Scott <newsgroups@gefion.myzen.co.uk> - 2026-06-30 09:52 +0100
                            Re: Long-wave close down Max Demian <max_demian@bigfoot.com> - 2026-06-30 13:25 +0100
                              Re: Long-wave close down Scott <newsgroups@gefion.myzen.co.uk> - 2026-06-30 13:54 +0100
                                Re: Long-wave close down liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-06-30 17:46 +0100
                                  Re: Long-wave close down snipeco.2@gmail.com (Sn!pe) - 2026-07-01 04:08 +0100
                                    Re: Long-wave close down Andy Burns <usenet@andyburns.uk> - 2026-07-01 08:01 +0100
                                    Re: Long-wave close down liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-07-01 10:18 +0100
                                      Re: Long-wave close down Andy Burns <usenet@andyburns.uk> - 2026-07-01 10:59 +0100
                                      Re: Long-wave close down "J. P. Gilliver" <G6JPG@255soft.uk> - 2026-07-01 13:29 +0100
                                        Re: Long-wave close down John Williamson <johnwilliamson@btinternet.com> - 2026-07-01 13:57 +0100
                                        Re: Long-wave close down liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-07-01 15:02 +0100
                              Re: Long-wave close down Andy Burns <usenet@andyburns.uk> - 2026-06-30 17:37 +0100
                                Re: Long-wave close down liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-06-30 17:54 +0100
                                Re: Long-wave close down Charles Hope <clh@candehope.me.uk> - 2026-06-30 17:00 +0000
                                  Re: Long-wave close down Andy Burns <usenet@andyburns.uk> - 2026-06-30 19:23 +0100
                                    Re: Long-wave close down Rink <rink.hof.haalditmaarweg@planet.nl> - 2026-07-02 16:57 +0200
                                      Re: Long-wave close down Andy Burns <usenet@andyburns.uk> - 2026-07-02 16:01 +0100
                                  Re: Long-wave close down Rink <rink.hof.haalditmaarweg@planet.nl> - 2026-06-30 23:30 +0200
                                Re: Long-wave close down "J. P. Gilliver" <G6JPG@255soft.uk> - 2026-06-30 19:18 +0100
                                  Re: Long-wave close down Rink <rink.hof.haalditmaarweg@planet.nl> - 2026-07-02 17:08 +0200
                                Re: Long-wave close down Andy Burns <usenet@andyburns.uk> - 2026-07-02 16:10 +0100
                                  Re: Long-wave close down "J. P. Gilliver" <G6JPG@255soft.uk> - 2026-07-02 23:26 +0100
                                    Re: Long-wave close down Andy Burns <usenet@andyburns.uk> - 2026-07-03 07:52 +0100
                            Re: Long-wave close down snipeco.2@gmail.com (Sn!pe) - 2026-07-01 04:08 +0100
                              Re: Long-wave close down "J. P. Gilliver" <G6JPG@255soft.uk> - 2026-07-01 13:30 +0100
                          Re: Long-wave close down Roderick Stewart <rjfs@escapetime.myzen.co.uk> - 2026-06-30 10:21 +0100
                            Re: Long-wave close down liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2026-06-30 11:35 +0100
                          Re: Long-wave close down Andy Burns <usenet@andyburns.uk> - 2026-06-30 10:28 +0100
                            Re: Long-wave close down Apd <not@all.invalid> - 2026-06-30 12:22 +0100
                              Re: Long-wave close down Andy Burns <usenet@andyburns.uk> - 2026-06-30 12:28 +0100
                                Re: Long-wave close down Apd <not@all.invalid> - 2026-06-30 13:19 +0100
      Re: Long-wave close down Rink <rink.hof.haalditmaarweg@planet.nl> - 2026-06-30 23:33 +0200

Page 2 of 3 — ← Prev page 1 [2] 3  Next page →

#70268

Liz Tuddenham wrote:

> A reasonable cross-bearing could be taken from almost anywhere in
> England  on the East side of the N-S centre line.    A bearing from the
> extreme West of Cornwall or Wales would be just as useful.  (If you
> could be sure you haven't taken a back-bearing, anywhere North of
> Birmingham should be good enough.)
 From here (52.5525°N 1.1416°W) the null occurs when the radio is 
aligned to about 242°

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#70270

On 2026/6/29 20:17:21, Andy Burns wrote:
> Liz Tuddenham wrote:
> 
>> A reasonable cross-bearing could be taken from almost anywhere in
>> England  on the East side of the N-S centre line.    A bearing from the
>> extreme West of Cornwall or Wales would be just as useful.  (If you
>> could be sure you haven't taken a back-bearing, anywhere North of
>> Birmingham should be good enough.)
>  From here (52.5525°N 1.1416°W) the null occurs when the radio is 
> aligned to about 242°

Are the BBC and Arquiva so uncontactable that it's impossible to just
ask them?
-- 
J. P. Gilliver. UMRA: 1960/<1985 MB++G()ALIS-Ch++(p)Ar++T+H+Sh0!:`)DNAf

Philosophy is questions that may never be answered.
Religion is answers that may never be questioned.

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#70271

In article <111us85$lp68$1@dont-email.me>, J. P. Gilliver
<G6JPG@255soft.uk> scribeth thus
>On 2026/6/29 20:17:21, Andy Burns wrote:
>> Liz Tuddenham wrote:
>> 
>>> A reasonable cross-bearing could be taken from almost anywhere in
>>> England  on the East side of the N-S centre line.    A bearing from the
>>> extreme West of Cornwall or Wales would be just as useful.  (If you
>>> could be sure you haven't taken a back-bearing, anywhere North of
>>> Birmingham should be good enough.)
>>  From here (52.5525°N 1.1416°W) the null occurs when the radio is 
>> aligned to about 242°
>
>Are the BBC and Arquiva so uncontactable that it's impossible to just
>ask them?

Not easy can try the Radio Desk at Emley Moor or their public relations
dept on their main site somewhere..
-- 
Tony Sayer


Man is least himself when he talks in his own person. 

Give him a keyboard, and he will reveal himself.

                

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#70272

On 30/06/2026 00:38, tony sayer wrote:
> Not easy can try the Radio Desk at Emley Moor or their public relations
> dept on their main site somewhere..


It just not part of their contract to deal directly with customers, like 
many other organisations / companies - it is what happens when you 
privatise services.


Also remember this from the BBC Media Centre.

https://www.bbc.co.uk/mediacentre/articles/2026/radio-4-broadcasts-on-long-wave-to-end

Long Wave is not classified as Critical National Infrastructure.

The Shipping Forecast does not constitute part of the UK’s mandatory 
Maritime Safety Information (MSI) service; it has always been a 
UK-specific, complementary broadcast. MSI is considered of vital concern 
to all vessels, and the Maritime and Coastguard Agency encourage all 
seafarers to make every effort to receive it.

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#70273

J. P. Gilliver <G6JPG@255soft.uk> wrote:

> On 2026/6/29 20:17:21, Andy Burns wrote:
> > Liz Tuddenham wrote:
> > 
> >> A reasonable cross-bearing could be taken from almost anywhere in
> >> England  on the East side of the N-S centre line.    A bearing from the
> >> extreme West of Cornwall or Wales would be just as useful.  (If you
> >> could be sure you haven't taken a back-bearing, anywhere North of
> >> Birmingham should be good enough.)
> >  From here (52.5525°N 1.1416°W) the null occurs when the radio is
> > aligned to about 242°

[Sorry to use J.P.Gilliver's post to reply to Andy but Andy's posts are
unreadable on my newsreader, so I have to wait for someone else to quote
them.]

From those bearings it looks almost certain to be coming from Droitwich.
A friend in Colchester has told me that the transmissions are nulling on
an approximately E-W line, so that would also point in the general
direction of Droitwich.


-- 
~ Liz Tuddenham ~
(Remove the ".invalid"s and add ".co.uk" to reply)
www.poppyrecords.co.uk

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#70276

On 2026/6/30 9:4:36, Liz Tuddenham wrote:
> J. P. Gilliver <G6JPG@255soft.uk> wrote:
> 
>> On 2026/6/29 20:17:21, Andy Burns wrote:
>>> Liz Tuddenham wrote:
>>>
>>>> A reasonable cross-bearing could be taken from almost anywhere in
>>>> England  on the East side of the N-S centre line.    A bearing from the
>>>> extreme West of Cornwall or Wales would be just as useful.  (If you
>>>> could be sure you haven't taken a back-bearing, anywhere North of
>>>> Birmingham should be good enough.)
>>>  From here (52.5525°N 1.1416°W) the null occurs when the radio is
>>> aligned to about 242°
> 
> [Sorry to use J.P.Gilliver's post to reply to Andy but Andy's posts are
> unreadable on my newsreader, so I have to wait for someone else to quote
> them.]

(No problem AFAIAconcerned.)
> 
> From those bearings it looks almost certain to be coming from Droitwich.
> A friend in Colchester has told me that the transmissions are nulling on
> an approximately E-W line, so that would also point in the general
> direction of Droitwich.
> 
> 
It does seem silly that we have to go through this sort of palaver
because we can't just ask!

On Tuesday (oh - that's today), are we expecting the actual transmitters
to be turned off, or just the loop announcement? If the transmitters,
have all the teleswitches been replaced?

And _have_ the MW infill stations (Newcastle etc.) been turned off? I at
first thought they would be, because their existence was due to patchy
LW coverage in certain areas, so their reason for existing has gone;
however, as they _are_ on MW not LW, it's possible that - in the
relevant areas - they actually might have more listeners, MW sets being
a bit more common.
-- 
J. P. Gilliver. UMRA: 1960/<1985 MB++G()ALIS-Ch++(p)Ar++T+H+Sh0!:`)DNAf

Q. Why did the chicken cross the Mobius strip?
A. To get to the same side.

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#70277

On Tue, 30 Jun 2026 09:39:19 +0100, "J. P. Gilliver"
<G6JPG@255soft.uk> wrote:

>On 2026/6/30 9:4:36, Liz Tuddenham wrote:
>> J. P. Gilliver <G6JPG@255soft.uk> wrote:
>> 
>>> On 2026/6/29 20:17:21, Andy Burns wrote:
>>>> Liz Tuddenham wrote:
>>>>
>>>>> A reasonable cross-bearing could be taken from almost anywhere in
>>>>> England  on the East side of the N-S centre line.    A bearing from the
>>>>> extreme West of Cornwall or Wales would be just as useful.  (If you
>>>>> could be sure you haven't taken a back-bearing, anywhere North of
>>>>> Birmingham should be good enough.)
>>>>  From here (52.5525°N 1.1416°W) the null occurs when the radio is
>>>> aligned to about 242°
>> 
>> [Sorry to use J.P.Gilliver's post to reply to Andy but Andy's posts are
>> unreadable on my newsreader, so I have to wait for someone else to quote
>> them.]
>
>(No problem AFAIAconcerned.)
>> 
>> From those bearings it looks almost certain to be coming from Droitwich.
>> A friend in Colchester has told me that the transmissions are nulling on
>> an approximately E-W line, so that would also point in the general
>> direction of Droitwich.
>> 
>> 
>It does seem silly that we have to go through this sort of palaver
>because we can't just ask!
>
>On Tuesday (oh - that's today), are we expecting the actual transmitters
>to be turned off, or just the loop announcement? If the transmitters,
>have all the teleswitches been replaced?
>
>And _have_ the MW infill stations (Newcastle etc.) been turned off? I at
>first thought they would be, because their existence was due to patchy
>LW coverage in certain areas, so their reason for existing has gone;
>however, as they _are_ on MW not LW, it's possible that - in the
>relevant areas - they actually might have more listeners, MW sets being
>a bit more common.
 
Lisnagarvey 15 April 2024. See:
https://en.wikipedia.org/wiki/Lisnagarvey_transmitting_station 

"BBC Radio 4's medium wave service from this transmitter along with
all of the other BBC Radio 4 medium wave transmitters ended on 15
April 2024, following by a retune loop informing listeners to retune
to other methods of reception." 

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#70287

On 30/06/2026 09:39, J. P. Gilliver wrote:
> On 2026/6/30 9:4:36, Liz Tuddenham wrote:
>> J. P. Gilliver <G6JPG@255soft.uk> wrote:
>>
>>> On 2026/6/29 20:17:21, Andy Burns wrote:
>>>> Liz Tuddenham wrote:
>>>>
>>>>> A reasonable cross-bearing could be taken from almost anywhere in
>>>>> England  on the East side of the N-S centre line.    A bearing from the
>>>>> extreme West of Cornwall or Wales would be just as useful.  (If you
>>>>> could be sure you haven't taken a back-bearing, anywhere North of
>>>>> Birmingham should be good enough.)
>>>>   From here (52.5525°N 1.1416°W) the null occurs when the radio is
>>>> aligned to about 242°
>>
>> [Sorry to use J.P.Gilliver's post to reply to Andy but Andy's posts are
>> unreadable on my newsreader, so I have to wait for someone else to quote
>> them.]
> 
> (No problem AFAIAconcerned.)
>>
>>  From those bearings it looks almost certain to be coming from Droitwich.
>> A friend in Colchester has told me that the transmissions are nulling on
>> an approximately E-W line, so that would also point in the general
>> direction of Droitwich.
>>
>>
> It does seem silly that we have to go through this sort of palaver
> because we can't just ask!
> 
> On Tuesday (oh - that's today), are we expecting the actual transmitters
> to be turned off, or just the loop announcement? If the transmitters,
> have all the teleswitches been replaced?

The message, and the 198 kHz carrier, stopped some time this morning (30 
June); I don't know what time.

-- 
Max Demian

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#70288

On Tue, 30 Jun 2026 13:25:30 +0100, Max Demian
<max_demian@bigfoot.com> wrote:

>On 30/06/2026 09:39, J. P. Gilliver wrote:
>> On 2026/6/30 9:4:36, Liz Tuddenham wrote:
>>> J. P. Gilliver <G6JPG@255soft.uk> wrote:
>>>
>>>> On 2026/6/29 20:17:21, Andy Burns wrote:
>>>>> Liz Tuddenham wrote:
>>>>>
>>>>>> A reasonable cross-bearing could be taken from almost anywhere in
>>>>>> England  on the East side of the N-S centre line.    A bearing from the
>>>>>> extreme West of Cornwall or Wales would be just as useful.  (If you
>>>>>> could be sure you haven't taken a back-bearing, anywhere North of
>>>>>> Birmingham should be good enough.)
>>>>>   From here (52.5525°N 1.1416°W) the null occurs when the radio is
>>>>> aligned to about 242°
>>>
>>> [Sorry to use J.P.Gilliver's post to reply to Andy but Andy's posts are
>>> unreadable on my newsreader, so I have to wait for someone else to quote
>>> them.]
>> 
>> (No problem AFAIAconcerned.)
>>>
>>>  From those bearings it looks almost certain to be coming from Droitwich.
>>> A friend in Colchester has told me that the transmissions are nulling on
>>> an approximately E-W line, so that would also point in the general
>>> direction of Droitwich.
>>>
>>>
>> It does seem silly that we have to go through this sort of palaver
>> because we can't just ask!
>> 
>> On Tuesday (oh - that's today), are we expecting the actual transmitters
>> to be turned off, or just the loop announcement? If the transmitters,
>> have all the teleswitches been replaced?
>
>The message, and the 198 kHz carrier, stopped some time this morning (30 
>June); I don't know what time.

The message has gone here too (Westerglen reception area). 

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#70290

Scott <newsgroups@gefion.myzen.co.uk> wrote:

> On Tue, 30 Jun 2026 13:25:30 +0100, Max Demian
> <max_demian@bigfoot.com> wrote:
> 
> >On 30/06/2026 09:39, J. P. Gilliver wrote:
> >> On 2026/6/30 9:4:36, Liz Tuddenham wrote:
> >>> J. P. Gilliver <G6JPG@255soft.uk> wrote:
> >>>
> >>>> On 2026/6/29 20:17:21, Andy Burns wrote:
> >>>>> Liz Tuddenham wrote:
> >>>>>
> >>>>>> A reasonable cross-bearing could be taken from almost anywhere in
> >>>>>> England  on the East side of the N-S centre line.    A bearing from the
> >>>>>> extreme West of Cornwall or Wales would be just as useful.  (If you
> >>>>>> could be sure you haven't taken a back-bearing, anywhere North of
> >>>>>> Birmingham should be good enough.)
> >>>>>   From here (52.5525°N 1.1416°W) the null occurs when the radio is
> >>>>> aligned to about 242°
> >>>
> >>> [Sorry to use J.P.Gilliver's post to reply to Andy but Andy's posts are
> >>> unreadable on my newsreader, so I have to wait for someone else to quote
> >>> them.]
> >> 
> >> (No problem AFAIAconcerned.)
> >>>
> >>>  From those bearings it looks almost certain to be coming from Droitwich.
> >>> A friend in Colchester has told me that the transmissions are nulling on
> >>> an approximately E-W line, so that would also point in the general
> >>> direction of Droitwich.
> >>>
> >>>
> >> It does seem silly that we have to go through this sort of palaver
> >> because we can't just ask!
> >> 
> >> On Tuesday (oh - that's today), are we expecting the actual transmitters
> >> to be turned off, or just the loop announcement? If the transmitters,
> >> have all the teleswitches been replaced?
> >
> >The message, and the 198 kHz carrier, stopped some time this morning (30
> >June); I don't know what time.
> 
> The message has gone here too (Westerglen reception area). 

No carrier here.

On Tuesday evenings I travel under a particular power line (33kV?) that
radiates a huge RF signal, which was strong enough to blot out R4 long
wave for some distance each side.  It seems to go off later in the
evenings, so it might be a noisy inverter on a solar farm feeding the
line.  It will be interesting to hear how far away I can hear it
tonight.

There is another power line crossing the M5 near Exeter, that radiates
over an even wider area - and that sounds distinctly like data.


-- 
~ Liz Tuddenham ~
(Remove the ".invalid"s and add ".co.uk" to reply)
www.poppyrecords.co.uk

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#70301

Liz Tuddenham <liz@poppyrecords.invalid.invalid> wrote:

> On Tuesday evenings I travel under a particular power line (33kV?) that
> radiates a huge RF signal, which was strong enough to blot out R4 long
> wave for some distance each side.  It seems to go off later in the
> evenings, so it might be a noisy inverter on a solar farm feeding the
> line.  It will be interesting to hear how far away I can hear it
> tonight.
> 
> There is another power line crossing the M5 near Exeter, that radiates
> over an even wider area - and that sounds distinctly like data.
>

I read somewhere that the power grid already carries data on optical
fibre slung alongside the inter-pylon earth conductor.  I think they're
a significant connectivity provider.  I might have imagined this...

-- 
^Ï^.    Sn!pe, bird-brain.      All that was old is new again. 

                 My pet rock Gordon just is.

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#70303

Sn!pe wrote:

> I read somewhere that the power grid already carries data on optical
> fibre slung alongside the inter-pylon earth conductor.  I think they're
> a significant connectivity provider.  I might have imagined this...
That was originally Energis (provided Demon's backbone?) and seems to 
have ended-up as part of Vodafone.

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#70304

Sn!pe <snipeco.2@gmail.com> wrote:

> Liz Tuddenham <liz@poppyrecords.invalid.invalid> wrote:
> 
> > On Tuesday evenings I travel under a particular power line (33kV?) that
> > radiates a huge RF signal, which was strong enough to blot out R4 long
> > wave for some distance each side.  It seems to go off later in the
> > evenings, so it might be a noisy inverter on a solar farm feeding the
> > line.  It will be interesting to hear how far away I can hear it
> > tonight.
> > 
> > There is another power line crossing the M5 near Exeter, that radiates
> > over an even wider area - and that sounds distinctly like data.
> >
> 
> I read somewhere that the power grid already carries data on optical
> fibre slung alongside the inter-pylon earth conductor.  I think they're
> a significant connectivity provider.  I might have imagined this...

Some power lines appear to have extra bit of kit attached to them - but
optical fibre doesn't radiate on long wave.

I kept the van radio tuned to 198 Kc/s for the whole journey yesterday
evening and the results were most instructive:

At first I noticed regular wavs of digital hash as I drove along the
streets.  Eventually I realised that these coincided with telephone
lines - presumably radiating broadband signals.  Passing cars generated
various levels of whine and hash and my own van generates a variety of
switch clicks (but no ignition nose, as it is a diesel).  Some premises
radiate a lot of hash.  Most, but not all, power lines radiate a low
level of mains-related harmonics, 132 kV lines also radiate crackles and
hiss (there was light rain at the time).  

The line which originally attracted my attention was now audible for a
much greater distance along the road than it was when Droitwich was
transmitting; this allowed me to hear the sound pattern for much longer.
The effect was a curious one like a beat note between two data streams
at different drifting frequencies or 'aircraft flutter'.  

The road which the line crosses is a fast and dangerous one, so stopping
to listen underneath the line isn't an option.  There is a layby which
might be within listening distance, so 'll try to stop there next week
and make an audio recording of the signals.

-- 
~ Liz Tuddenham ~
(Remove the ".invalid"s and add ".co.uk" to reply)
www.poppyrecords.co.uk

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#70305

Liz Tuddenham wrote:

> I realised that these coincided with telephone lines - presumably
> radiating broadband signals.

Which would be between 25 kHz and 17.66 MHz, split across three upstream 
and three downstream bands.

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#70309

On 2026/7/1 10:18:13, Liz Tuddenham wrote:
[]
> lines - presumably radiating broadband signals.  Passing cars generated
> various levels of whine and hash and my own van generates a variety of
> switch clicks (but no ignition nose, as it is a diesel).  Some premises
[]
Aren't the injectors on Diesels electrically-operated? Sure, less
inherently radiative than ignitions, but such powerful devices must
involve quite large pulses of energy ...
-- 
J. P. Gilliver. UMRA: 1960/<1985 MB++G()ALIS-Ch++(p)Ar++T+H+Sh0!:`)DNAf

Never be led astray onto the path of virtue.

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#70311

On 01/07/2026 13:29, J. P. Gilliver wrote:
> On 2026/7/1 10:18:13, Liz Tuddenham wrote:
> []
>> lines - presumably radiating broadband signals.  Passing cars generated
>> various levels of whine and hash and my own van generates a variety of
>> switch clicks (but no ignition nose, as it is a diesel).  Some premises
> []
> Aren't the injectors on Diesels electrically-operated? Sure, less
> inherently radiative than ignitions, but such powerful devices must
> involve quite large pulses of energy ...
>
That depends on the age of the engine. Older ones, such as the one on my 
boat, are entirely mechanical.

Even the ones on our Sprinters are just a solenoid operated valve, with 
a high pressure DC powered pump.

-- 
Tciao for Now!

John.

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#70312

J. P. Gilliver <G6JPG@255soft.uk> wrote:

> On 2026/7/1 10:18:13, Liz Tuddenham wrote:
> []
> > lines - presumably radiating broadband signals.  Passing cars generated
> > various levels of whine and hash and my own van generates a variety of
> > switch clicks (but no ignition nose, as it is a diesel).  Some premises
> []
> Aren't the injectors on Diesels electrically-operated? Sure, less
> inherently radiative than ignitions, but such powerful devices must
> involve quite large pulses of energy ...

They are electrical on this model but they don't seem to emit RF.


-- 
~ Liz Tuddenham ~
(Remove the ".invalid"s and add ".co.uk" to reply)
www.poppyrecords.co.uk

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#70289

Max Demian wrote:

> The message, and the 198 kHz carrier, stopped some time this morning (30 
> June); I don't know what time.

Nothing left on LW band now ...

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#70291

Andy Burns <usenet@andyburns.uk> wrote:

> Max Demian wrote:
> 
> > The message, and the 198 kHz carrier, stopped some time this morning (30
> > June); I don't know what time.
> 
> Nothing left on LW band now ...

Lots of room for WSPA channels.  Easy to transmit secretly using
redundant power lines, easy to receive secretly anywhere in the World
(even underwater) on a ferrite rod if you have access to the software
and appropriate codes.  Very difficult for unauthorised listeners to
detect.

-- 
~ Liz Tuddenham ~
(Remove the ".invalid"s and add ".co.uk" to reply)
www.poppyrecords.co.uk

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#70292

On 30/06/2026 17:37, Andy Burns wrote:
> Max Demian wrote:
> 
>> The message, and the 198 kHz carrier, stopped some time this morning 
>> (30 June); I don't know what time.
> 
> Nothing left on LW band now ...
> 
even in Russia?

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