>Date: Tue, 25 Aug 2020 03:06:17 +0000 (UTC)
>From: Neal Swanberg <njswanberg(a)yahoo.com>
>Subject: Fw: [Fwd: FW: How Radar Helped Win World War II -Distinguished
> Lecturer Eli Brookner
>----- Forwarded Message -----
>From: Neal Swanberg <njswanberg(a)yahoo.com>
>Sent: Monday, August 24, 2020, 08:05:11 PM PDT
>Subject: How Radar Helped Win World War II
>-Distinguished Lecturer Eli Brookner]
>----- Forwarded Message -----
>From: t3 <wb9vxy(a)gmail.com>
>To: Swanberg Neal <njswanberg(a)yahoo.com>
>Sent: Monday, August 24, 2020, 09:55:45 AM PDT
>Subject: [Fwd: FW: How Radar Helped Win World
>War II -Distinguished Lecturer Eli Brookner]
>For the group.
>DISTINGUISHED LECTURE - HOW RADAR HELPED WIN WORLD WAR II
>DR. ELI BROOKNER
>WEDNESDAY, AUGUST 26. 3:30 PACIFIC TIME (6:30 ET)
>AESS Chapter Meeting. Virtual Meeting Registration open to all IEEE
>chapters and sections to co-host and serve their local membership and
>the public. Registration is being collected through Boston, watch out
>for time zone as 6:30 eastern start time is 3:30 pacific.
>Talk for the general public of all ages and technical levels.
>Dr. Brookner will provide an easy to understand explanation of how
>radar works. Radar was in its infancy at the start of World War II. The
>British were using radar effectively along their coastline with a
>network of antennas on 300-foot-tall towers to warn of approaching
>enemy aircraft and missiles but they needed an invention that would
>allow radars to be small enough to fit on ships and aircraft. They
>invented the cavity magnetron and looked to American manufacturing
>know-how and resources for rapid mass production. They were turned down
>by all the major US firms, but a small Boston newcomer, Raytheon
>Company, responded with a solution. The once small company ended up
>making 85% of all magnetrons used by the allies in the war; this
>changed the course of the war. By the end of World War II, Raytheonâs
>shipborne radars were on all allied ships military and civilian. Radar
>can see at night, through clouds, in and fog. Radar can be used to land
>aircraft in zero visibility. Radar can be used to identify targets to
>prevent fratricide, deploy forces optimally, for navigation, for
>Eli Brookner, global radar authority, worked at Raytheon Company from
>1962 to 2014. Dr. Brookner will show just how dramatically the use of
>radar on aircraft and ships helped to destroy enemy aircraft, ships,
>missiles and submarines. How the use of miniature radars on the tops
>of artillery shells immensely increased their effectiveness against
>aircraft, missiles, infantry men and their equipment. These miniature
>TOP SECRET radars, called proximity fuzes, used miniature glass tubes
>which had to withstand 20,000 g when blasted from the artillery guns.
>Raytheon was one of the suppliers of these tubes. 22,000,000 proximity
>fuzes with 140,000,000 tubes were produced during WW II.
>Date and Time
>Date: 26 Aug 2020
>Time: 03:30 PM to 05:15 PM
>All times are US/Pacific
>Add_To_Calendar_icon Add Event to Calendar
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>Must preregister for connection information
>San Diego, California
>San Diego Section Chapter, AES10
>with the IEEE Boston Chapter
>This meeting will be offered virtually -- IEEE connection information
>will be provided to all preregistered attendees.
>Link to External Registration
>Dr. Eli Brookner, Distinguished Lecturer Eli Brookner is a global
>radar authority known for his contributions to airborne, intelligence,
>space, air-traffic control and defense mission systems. Among his
>accomplishments is his leadership in designing advanced airport
>surveillance radars, making air travel safer. A principal engineering
>fellow at Raytheon Companyâs Integrated Defense Systems, Sudbury,
>Massachusetts, Dr. Brookner has played a key role in many major radar
>and phased-array radar systems developed during the past 40 years. His
>teaching and lecturing have inspired and educated several generations
>of radar engineers worldwide, over 10,000 have attended his lectures.
>Agenda - must preregister
>3:20 PM PACIFIC (5:20 Eastern) Joint Meeting - Registration is
>collected through Boston, watch out for time zone
>Pre-registration required. This meeting will be available via webinar
>and your contact details are necessary to provide connection
I heard someone using below phone on the Papa system yesterday; its an
Android with 440MHz radio! The Amazon link claims it can w/stand immersion
in 2 meters of water for 2 hours and 1 meter of concrete for 24 hours! (I
wonder how they got it out of the concrete after the concrete set up?).
Also states they tested it by driving nails with the screen (doesn't say if
it passed or not)!
I guess you can claim anything when selling on Amazon from China.
NZ to trial world-first commercial long-range, wireless power
By Loz Blain
August 03, 2020
A New Zealand-based startup has developed a method of safely and
wirelessly transmitting electric power across long distances without
the use of copper wire, and is working on implementing it with the
country's second-largest power distributor.
The dream of wireless power transmission is far from new; everyone's
favorite electrical genius Nikola Tesla once proved he could power
light bulbs from more than two miles away with a 140-foot Tesla coil
in the 1890s never mind that in doing so he burned out the dynamo at
the local powerplant and plunged the entire town of Colorado Springs
Tesla's dream was to place enormous towers all over the world that
could transmit power wirelessly to any point on the globe, powering
homes, businesses, industries and even giant electric ships on the
ocean. Investor J.P. Morgan famously killed the idea with a single
question: "where can I put the meter?"
It has taken 120 years, but New Zealand company Emrod appears to have
finally convinced a major power distributor to have a crack at going
wireless in a commercial capacity. Powerco, the second-biggest
distributor in New Zealand, is investing in Emrod, whose technology
appears to be able to shift large amounts of electricity much more
efficiently, between any two points that can be joined with
"Were interested to see whether Emrods technology can complement the
established ways we deliver power," said Powercos Network
Transformation Manager Nicolas Vessiot. "We envisage using this to
deliver electricity in remote places, or across areas with challenging
terrain. Theres also potential to use it to keep the lights on for
our customers when were doing maintenance on our existing
Emrod currently has a working prototype of its device, but will build
another for Powerco, with plans to deliver by October, then spend
several months in lab testing before moving to a field trial. The
prototype device will be capable of delivering "only a few kilowatts"
of power, but can easily be scaled up. "We can use the exact same
technology to transmit 100 times more power over much longer
distances," said Emrod founder and serial entrepreneur Greg Kushnir.
"Wireless systems using Emrod technology can transmit any amount of
power current wired solutions transmit."
The system uses a transmitting antenna, a series of relays and a
receiving rectenna (a rectifying antenna capable of converting
microwave energy into electricity). Each of these components appear in
these images to simply look like big ol' squares on poles. Its beams
use the non-ionizing Industrial, Scientific and Medical band of the
radio spectrum, including frequencies commonly used in Wi-Fi and
Unlike Tesla's globally-accessible free power dream, the power here is
beamed directly between specific points, with no radiation around the
beam, and a "low power laser safety curtain" immediately shuts down
power transmission before any object, like a bird, drone, power thief
or helicopter, can touch the main beam. There will be no difficulties
this time working out where to place the meter.
Emrod says it works in any atmospheric conditions, including rain, fog
and dust, and the distance of transmission is limited only by line of
sight between each relay, giving it the potential to transmit power
thousands of kilometers, at a fraction of the infrastructure costs,
maintenance costs and environmental impact a wired solution imposes.
Indeed, Emrod sees wireless transmission as a key enabling technology
for renewable power, which is often generated far from where it's
needed. This kind of system could be terrific for getting the products
of offshore and remote renewable energy generation into the city grids
without the need for giant storage batteries and the like.
Crude render of a temporary power transmission truck
Crude render of a temporary power transmission truckEmrod
It'll also be handy in certain unplanned outage events; a truck can be
fitted out with a rectenna, and then driven anywhere in visual range
of a relay to create a temporary wireless power connection.
The company has been liaising with the Radio Spectrum Management
authorities in New Zealand throughout its development process, with a
view to meeting every safety standard even once the technology scales
right up to high power levels, a process Kushnir says has also helped
Emrod develop guidelines for the companies that will be using the
We've contacted Emrod to ask more about efficiency, the size, shape
and state of the current prototype, future plans and what indeed would
happen if you stuck your hand in the middle of the beam, and will
bring you more information when we can.
Update: we have now spoken with Emrod founder Greg Kushnir, who had
plenty to share in our interview story.