[600MRG] Radio engineer Grady Motes and the HEBA efficient small size medium wave antenna

Sat Feb 18 17:28:45 EST 2023

Hi Rick and others

What I sent to Dave earlier

“Interesting as it seems (according to the specs and measured fields) that it looks very similar to  the Maurice Hately (GM3HAT sk) and others patent to actually
Work after so many installations failed to live up to design parameters around the globe.

I was fortunate to know Maurice way back when (he was a member of the Aberdeen radio club) but never got to play with a “CFA” usings Poyntings vector “stimulation”.

Interesting to see how stable with temperature and general weather the Goldilocks phase and power division works.”

Cheers and thanks for the links

Laurence KL7L  (GM4DMA)

I see the previous patents are named in the new patents -  and I note the  Smith chart is for the “top of the band”., well in some places around 1605kHz or so – the matching losses given the schematic are not going to be zero so Im not sure how we get into free space, perhaps some cryo cooling somewhere 😊

From: Rik Strobbe<mailto:rik.strobbe at kuleuven.be>
Sent: Saturday, February 18, 2023 9:48 PM
To: Dick Bingham<mailto:dick.bingham at gmail.com>; D.J.J. Ring, Jr.<mailto:n1ea at arrl.net>
Cc: Ken Roberson via 600MRG<mailto:600mrg at mailman.qth.net>
Subject: Re: [600MRG] Radio engineer Grady Motes and the HEBA efficient small size medium wave antenna

Also have a look at https://worldwideantennasystems.com/specs/<https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fworldwideantennasystems.com%2Fspecs%2F&data=05%7C01%7C%7C2ba87ecd64c54622f08308db11f9d0db%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638123536869402229%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=eFOBCzkzmzMNsFzye%2Fp5%2By0nXYRVtCDA66C%2FzahoKRY%3D&reserved=0>

They claim a "ground wave field strength of 250-300 mV/m at 1 kilometer with 1 kilowatt of input power", but without mentioning the exact operating frequency (525 - 1705 kHz).

This is however very close to the free space fieldstrength:

EIRP = (e*d)^2/30 where e = electric field strength in V/m and d = distance in m

EIRP = (0.25*1000)^2/30 = 2.08kW

Assuming that the antenna gain is 3 (as for a short vertical monopole) 1kW input power equals 3kW EIRP.

Ignoring any ground wave attenuation the antenna efficiency would be 70% !!!

For an antenna that is between 10% (at 1705kHz) and 3% (at 525 kHz) of the wavelength.

Allow me to have some doubts ...

73, Rik  ON7YD - OR7T

Van: 600mrg-bounces at mailman.qth.net <600mrg-bounces at mailman.qth.net> namens Dick Bingham <dick.bingham at gmail.com>
Verzonden: zaterdag 18 februari 2023 20:34
Aan: D.J.J. Ring, Jr.
CC: Ken Roberson via 600MRG
Onderwerp: Re: [600MRG] Radio engineer Grady Motes and the HEBA efficient small size medium wave antenna

Hi

Possibly interesting. I started watching the video and quit after maybe 5-minutes.
Talking-heads BS !!

I located this Patent Office info  for the HEBA antenna ===>
https://uspto.report/patent/grant/10,461,430<https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fuspto.report%2Fpatent%2Fgrant%2F10%2C461%2C430&data=05%7C01%7C%7C2ba87ecd64c54622f08308db11f9d0db%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638123536869402229%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=KfbEVbym7aFedRsfnFeH4TN56nnpeBsSjUtypIQrxcY%3D&reserved=0>

that may have more useful info.

73  Dick/w7wkr at CN97uj

On Sat, Feb 18, 2023 at 1:40 AM D.J.J. Ring, Jr. <n1ea at arrl.net<mailto:n1ea at arrl.net>> wrote:
Radio engineer Grady Motes and the HEBA efficient small size medium wave antenna.

https://youtu.be/TY1TArbqEfI<https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fyoutu.be%2FTY1TArbqEfI&data=05%7C01%7C%7C2ba87ecd64c54622f08308db11f9d0db%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638123536869402229%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=YrCjd8FsOoblz35j4BjyH1iLW2XZuA65gdo%2FAzxhbeY%3D&reserved=0>

Pleasing Audio Processing with Mike Erickson - TWiRT Ep. 444

Description

The HEBA - AM's Real Estate Relief - with Grady Moates - TWiRT Ep. 460

TWiRT - This Week in Radio Tech

Grady Moates is a “hands-on” broadcast engineer. Known widely for his audio processing expertise, Grady’s attention has more recently been on proving the performance of a novel antenna design. The High Efficiency Broadband Antenna (HEBA) - after years of additional research and real-world testing and proving - is now FCC approved. Grady explains how a HEBA help AM stations, especially those with real-estate opportunities.

Show Notes:

HEBA (High Efficiency Broadband Antenna) Specs
http://worldwideantennasystems.com/sp.<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fworldwideantennasystems.com%2Fsp.&data=05%7C01%7C%7C2ba87ecd64c54622f08308db11f9d0db%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638123536869558443%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=xZKtSCqdP103aHOBPVeaWyxGeFb8Ec5PH6rSoiLLkMY%3D&reserved=0>..

HEBA antenna under construction
http://worldwideantennasystems.com/news/<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fworldwideantennasystems.com%2Fnews%2F&data=05%7C01%7C%7C2ba87ecd64c54622f08308db11f9d0db%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638123536869558443%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=RYlfBsxOi9eUrUnfDk9qQ792Jjn%2BhNLVj5FgrripQrA%3D&reserved=0>

Photos, diagram, and rendered video of HEBA antenna
https://photos.app.goo.gl/9qvPVBHUmXr.<https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fphotos.app.goo.gl%2F9qvPVBHUmXr.&data=05%7C01%7C%7C2ba87ecd64c54622f08308db11f9d0db%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C638123536869558443%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=p49SGCbYx6888UcvPjE0wbFaAcNRBVs%2BwqdM1nCuiMg%3D&reserved=0>..
...more

TWiRT - This Week in Radio Tech
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