A more sensitive RF diode?

[Jan Panteltje]

A more sensitive RF diode?
https://www.fujitsu.com/global/about/resources/news/press-releases/2019/0924-01.html

 

[Joerg]

On 2019-09-27 07:10, jlarkin@highlandsniptechnology.com wrote:

On Fri, 27 Sep 2019 07:21:17 GMT, Jan Panteltje
pNaOnStPeAlMtje@yahoo.com> wrote:

A more sensitive RF diode?
https://www.fujitsu.com/global/about/resources/news/press-releases/2019/0924-01.html

Why not use a lithium battery?

More IoT press-release fantasy. You could post 50 of those every day.

Interesting diode though, for other applications. Now we need it to
become available for 10c/pop at Digikey.

IoT is hyped to the hilt with all sorts of fantasies. Then there are
those who ... just do it and no press releases. I have one such project
on the lab bench for debug right now. Soon it'll be out there in the
field without much fanfare.

--
Regards, Joerg

http://www.analogconsultants.com/

 

On Fri, 27 Sep 2019 07:21:17 GMT, Jan Panteltje
<pNaOnStPeAlMtje@yahoo.com> wrote:

A more sensitive RF diode?
https://www.fujitsu.com/global/about/resources/news/press-releases/2019/0924-01.html

Why not use a lithium battery?

More IoT press-release fantasy. You could post 50 of those every day.



--

John Larkin Highland Technology, Inc

lunatic fringe electronics

 

[Jan Panteltje]

On a sunny day (Fri, 27 Sep 2019 10:10:48 -0700 (PDT)) it happened
tabbypurr@gmail.com wrote in
<e1194ae6-0185-4e35-9552-a872abd5fe68@googlegroups.com>:

On Friday, 27 September 2019 08:21:18 UTC+1, Jan Panteltje wrote:

A more sensitive RF diode?
https://www.fujitsu.com/global/about/resources/news/press-releases/2019/0924-01.html

I thought harvesting radio power was generally illegal.


NT

Every radio does that to some extend.
Or is there a maximum power level above which it becomes illegal [where you are]?

 

[amdx]

On 9/27/2019 9:34 AM, Joerg wrote:

On 2019-09-27 07:10, jlarkin@highlandsniptechnology.com wrote:
On Fri, 27 Sep 2019 07:21:17 GMT, Jan Panteltje
pNaOnStPeAlMtje@yahoo.com> wrote:

A more sensitive RF diode?
https://www.fujitsu.com/global/about/resources/news/press-releases/2019/0924-01.html


Why not use a lithium battery?

More IoT press-release fantasy. You could post 50 of those every day.


Interesting diode though, for other applications. Now we need it to
become available for 10c/pop at Digikey.

IoT is hyped to the hilt with all sorts of fantasies. Then there are
those who ... just do it and no press releases. I have one such project
on the lab bench for debug right now. Soon it'll be out there in the
field without much fanfare.

Will you do us a little fan faring after it's out?
Curious!
Mikek

 

On Friday, 27 September 2019 08:21:18 UTC+1, Jan Panteltje wrote:

A more sensitive RF diode?
https://www.fujitsu.com/global/about/resources/news/press-releases/2019/0924-01.html

I thought harvesting radio power was generally illegal.


NT

 

[Joerg]

On 2019-09-27 09:52, amdx wrote:

On 9/27/2019 9:34 AM, Joerg wrote:
On 2019-09-27 07:10, jlarkin@highlandsniptechnology.com wrote:
On Fri, 27 Sep 2019 07:21:17 GMT, Jan Panteltje
pNaOnStPeAlMtje@yahoo.com> wrote:

A more sensitive RF diode?
https://www.fujitsu.com/global/about/resources/news/press-releases/2019/0924-01.html


Why not use a lithium battery?

More IoT press-release fantasy. You could post 50 of those every day.


Interesting diode though, for other applications. Now we need it to
become available for 10c/pop at Digikey.

IoT is hyped to the hilt with all sorts of fantasies. Then there are
those who ... just do it and no press releases. I have one such
project on the lab bench for debug right now. Soon it'll be out there
in the field without much fanfare.


Will you do us a little fan faring after it's out?
Curious!
Mikek

I'll ask the client and if ok I'll do that. It's in the oil business and
another (different client) in the ag business.

--
Regards, Joerg

http://www.analogconsultants.com/

 

[whit3rd]

On Friday, September 27, 2019 at 10:10:53 AM UTC-7, tabb...@gmail.com wrote:

On Friday, 27 September 2019 08:21:18 UTC+1, Jan Panteltje wrote:

A more sensitive RF diode?
https://www.fujitsu.com/global/about/resources/news/press-releases/2019/0924-01.html

I thought harvesting radio power was generally illegal.

Not if it's your own WiFi signal. Some of the old broadcast-power fantasies
are creeping into reality, and RFID tags were only the first bit of the crawl.

 

On Fri, 27 Sep 2019 22:37:45 -0700 (PDT), whit3rd <whit3rd@gmail.com>
wrote:

On Friday, September 27, 2019 at 10:10:53 AM UTC-7, tabb...@gmail.com wrote:
On Friday, 27 September 2019 08:21:18 UTC+1, Jan Panteltje wrote:

A more sensitive RF diode?
https://www.fujitsu.com/global/about/resources/news/press-releases/2019/0924-01.html

I thought harvesting radio power was generally illegal.

Not if it's your own WiFi signal. Some of the old broadcast-power fantasies
are creeping into reality, and RFID tags were only the first bit of the crawl.

It i much older than that. There were some self powered crystal
receivers, in which there was a fixed additional resonant circuit
tuned to a strong local broadcast station. The voltage was rectified
and used to power some amplifier stages in the actual freely tunable
weak signal section.

 

On Saturday, 28 September 2019 06:37:50 UTC+1, whit3rd wrote:

On Friday, September 27, 2019 at 10:10:53 AM UTC-7, tabby wrote:
On Friday, 27 September 2019 08:21:18 UTC+1, Jan Panteltje wrote:

A more sensitive RF diode?
https://www.fujitsu.com/global/about/resources/news/press-releases/2019/0924-01.html

I thought harvesting radio power was generally illegal.

Not if it's your own WiFi signal.

it's not always going to be your own if such things get widely deployed

Some of the old broadcast-power fantasies
are creeping into reality, and RFID tags were only the first bit of the crawl.

NT

 

[brian]

In message <e1194ae6-0185-4e35-9552-a872abd5fe68@googlegroups.com>,
tabbypurr@gmail.com writes

On Friday, 27 September 2019 08:21:18 UTC+1, Jan Panteltje wrote:

A more sensitive RF diode?

https://www.fujitsu.com/global/about/resources/news/press-releases/2019
/0924-01.html

I thought harvesting radio power was generally illegal.


NT

It seems it can be.

Http://www.industrytap.com/electromagnetic-harvesters-free-lunch-or-theft
/1805

Brian
--
Brian Howie

 

[brian]

In message <umstoeprhvc2litg03atgv7t81539r9slh@4ax.com>,
upsidedown@downunder.com writes

On Fri, 27 Sep 2019 22:37:45 -0700 (PDT), whit3rd <whit3rd@gmail.com
wrote:

On Friday, September 27, 2019 at 10:10:53 AM UTC-7, tabb...@gmail.com wrote:
On Friday, 27 September 2019 08:21:18 UTC+1, Jan Panteltje wrote:

A more sensitive RF diode?




https://www.fujitsu.com/global/about/resources/news/press-releases/2019/0924-01.html

I thought harvesting radio power was generally illegal.

Not if it's your own WiFi signal. Some of the old broadcast-power fantasies
are creeping into reality, and RFID tags were only the first bit of the crawl.

It i much older than that. There were some self powered crystal
receivers, in which there was a fixed additional resonant circuit
tuned to a strong local broadcast station. The voltage was rectified
and used to power some amplifier stages in the actual freely tunable
weak signal section.

I can light an LED from a Longwave Transmitter located 20 miles away.
It puts out 50kW. I dare say I could get it to run a small transistor
amplifier.

Brian
--
Brian Howie

 

[Cursitor Doom]

On Sun, 29 Sep 2019 20:24:51 +0100, brian wrote:

I can light an LED from a Longwave Transmitter located 20 miles away.
It puts out 50kW. I dare say I could get it to run a small transistor
amplifier.

Go for it. Channel Tesla. ;-)




--
This message may be freely reproduced without limit or charge only via
the Usenet protocol. Reproduction in whole or part through other
protocols, whether for profit or not, is conditional upon a charge of
GBP10.00 per reproduction. Publication in this manner via non-Usenet
protocols constitutes acceptance of this condition.

 

[Bill Sloman]

On Monday, September 30, 2019 at 8:45:47 AM UTC+10, Cursitor Doom wrote:

On Sun, 29 Sep 2019 20:24:51 +0100, brian wrote:

I can light an LED from a Longwave Transmitter located 20 miles away.
It puts out 50kW. I dare say I could get it to run a small transistor
amplifier.

Go for it. Channel Tesla. ;-)

It really is illegal. Closer to long wave transmitters, you are supposed to have to wrap your fluorescent tubes in a chicken wire Faraday cage to avoid getting illegal free lighting.

--
Bill Sloman, Sydney

 

[Gerhard Hoffmann]

Am 30.09.19 um 00:45 schrieb Cursitor Doom:

On Sun, 29 Sep 2019 20:24:51 +0100, brian wrote:

I can light an LED from a Longwave Transmitter located 20 miles away.
It puts out 50kW. I dare say I could get it to run a small transistor
amplifier.

Go for it. Channel Tesla. ;-)

Less than 20 miles from here there was Europawelle Saar,
1.6 MegaW on 1422 KHz. They had an antenna with a reflector tower
to notch out the radiation towards Russia, where there was a
station on the same frequency.

When electronic ignition became normal, they had to shield a
nearby Autobahn, or the cars would simply stop.

Last year, they took down the antennas:

< https://www.youtube.com/watch?v=OcRYS3UIb20 >

First half of the movie is non-content.


There is an old HP app note: Every Schottky is a zero-bias detector.
It is just a matter of matching.


/gerhard

 

On Mon, 30 Sep 2019 02:34:39 +0200, Gerhard Hoffmann <dk4xp@arcor.de>
wrote:

Am 30.09.19 um 00:45 schrieb Cursitor Doom:
On Sun, 29 Sep 2019 20:24:51 +0100, brian wrote:

I can light an LED from a Longwave Transmitter located 20 miles away.
It puts out 50kW. I dare say I could get it to run a small transistor
amplifier.

Much less would be sufficient to power a source follower between the
high impedance resonant circuit and relatively low impedance detector
and headphones (or horn speaker). Reducing resonant circuit loading
allows a higher loaded-Q and hence optimizing the bandwidth to
transmitted bandwidth (5-20 kHz).

Go for it. Channel Tesla. ;-)

Less than 20 miles from here there was Europawelle Saar,
1.6 MegaW on 1422 KHz. They had an antenna with a reflector tower
to notch out the radiation towards Russia, where there was a
station on the same frequency.

Better known as Radio Luxembourg.

When electronic ignition became normal, they had to shield a
nearby Autobahn, or the cars would simply stop.

That high power caused intermodulation in the ionosphere, known as
Luxemburg effect
https://en.wikipedia.org/wiki/Luxemburg%E2%80%93Gorky_effect

Last year, they took down the antennas:

https://www.youtube.com/watch?v=OcRYS3UIb20

First half of the movie is non-content.


There is an old HP app note: Every Schottky is a zero-bias detector.
It is just a matter of matching.


/gerhard

 

On Sun, 29 Sep 2019 16:58:23 -0700 (PDT), Bill Sloman
<bill.sloman@ieee.org> wrote:

On Monday, September 30, 2019 at 8:45:47 AM UTC+10, Cursitor Doom wrote:
On Sun, 29 Sep 2019 20:24:51 +0100, brian wrote:

I can light an LED from a Longwave Transmitter located 20 miles away.
It puts out 50kW. I dare say I could get it to run a small transistor
amplifier.

Go for it. Channel Tesla. ;-)

It really is illegal. Closer to long wave transmitters, you are supposed to have to wrap your fluorescent tubes in a chicken wire Faraday cage to avoid getting illegal free lighting.

In which countries does such laws exist ?. I could understand if
tapping electric or magnetic field from mains wires could be lapelled
as electric stealing. However, claiming tapping of electromagnetic
fields would be illegal, is simply ridiculous
..

 

[Jan Panteltje]

On a sunny day (Mon, 30 Sep 2019 02:34:39 +0200) it happened Gerhard Hoffmann
<dk4xp@arcor.de> wrote in <qmriiv$ulg$1@solani.org>:

Less than 20 miles from here there was Europawelle Saar,
1.6 MegaW on 1422 KHz. They had an antenna with a reflector tower
to notch out the radiation towards Russia, where there was a
station on the same frequency.

When electronic ignition became normal, they had to shield a
nearby Autobahn, or the cars would simply stop.

Last year, they took down the antennas:

https://www.youtube.com/watch?v=OcRYS3UIb20

First half of the movie is non-content.


There is an old HP app note: Every Schottky is a zero-bias detector.
It is just a matter of matching.


/gerhard

I had a LED connected to my 27 MHz GPA antenna,
it came on when my across the street neighbor turned on his transmitter.
I called him via radio and asked how much power he was running
4W was the maximum allowed at that time here, eeeehh.

I tested my 250 W shortwave linear antenna walking in the garden with a neon bulb.

Turn the thing around:
Is it legal for others to irradiate your house with 5G?

Alu-foil, alu-foil hats, I see a market

 

On Monday, 30 September 2019 06:50:42 UTC+1, upsid...@downunder.com wrote:

On Sun, 29 Sep 2019 16:58:23 -0700 (PDT), Bill Sloman
bill.sloman@ieee.org> wrote:
On Monday, September 30, 2019 at 8:45:47 AM UTC+10, Cursitor Doom wrote:
On Sun, 29 Sep 2019 20:24:51 +0100, brian wrote:

I can light an LED from a Longwave Transmitter located 20 miles away.
It puts out 50kW. I dare say I could get it to run a small transistor
amplifier.

Go for it. Channel Tesla. ;-)

It really is illegal. Closer to long wave transmitters, you are supposed to have to wrap your fluorescent tubes in a chicken wire Faraday cage to avoid getting illegal free lighting.

In which countries does such laws exist ?. I could understand if
tapping electric or magnetic field from mains wires could be lapelled
as electric stealing. However, claiming tapping of electromagnetic
fields would be illegal, is simply ridiculous
.

stating the law's position is not ridiculous afaik. His faraday cage comment is though.

 

[Gerhard Hoffmann]

Am 30.09.19 um 07:44 schrieb upsidedown@downunder.com:

On Mon, 30 Sep 2019 02:34:39 +0200, Gerhard Hoffmann <dk4xp@arcor.de


Less than 20 miles from here there was Europawelle Saar,
1.6 MegaW on 1422 KHz. They had an antenna with a reflector tower
to notch out the radiation towards Russia, where there was a
station on the same frequency.

Better known as Radio Luxembourg.

No, Luxemburg was 9 KHz higher and 30 Km farther away.

They built a large public swimming pool in the next village
because they had the hot water from cooling the plates for free.
A construction worker died when he touched the steel cable
hanging from a crane.

When electronic ignition became normal, they had to shield a
nearby Autobahn, or the cars would simply stop.

That high power caused intermodulation in the ionosphere, known as
Luxemburg effect
https://en.wikipedia.org/wiki/Luxemburg%E2%80%93Gorky_effect

Yes. And it was unfortunate that the 2 strongest MW stations in Europe
were only 9 KHz apart. When you traveled to the Mediterranian sea,
they were the only German language stations you could reliably hear.

Europawelle Saar was the natural station for my first detector receiver
I built as a kid.

Nobody listens here to AM any more.

/gerhard