[SBE-89-Alaska] [EXTERNAL] Re: HARRP

[Pearson, Ron]

What are you referring to with ferrites?

From: Stephen Lockwood <lockwood at hatdaw.com>
Sent: Tuesday, July 30, 2024 12:07 PM
To: Charles Sather <CSather at knba.org>; Pearson, Ron <RonPearson at iheartmedia.com>; SBE-89-Alaska <sbe-89-alaska at sea.sbe16.org>
Subject: Re: [SBE-89-Alaska] [EXTERNAL] Re: HARRP


There are none!

Stephen S. Lockwood, P.E., PMP, President

Hatfield & Dawson Consulting Engineers

9500 Greenwood Ave N, Seattle, WA 98103

Phone 206 783 9151 ext 562 - Mobile 206 399 9440 - www.hatdaw.com<http://www.hatdaw.com/>
On 7/30/2024 1:04 PM, Charles Sather wrote:
Did you get a count of ferrites for Jeff?

Charles Sather
Chief Operating Officer, Koahnic Broadcast Corporation
P. 907-793-3535 | koahnicbroadcast.org
Support KBC and its programs through Pick.Click.Give

From: SBE-89-alaska <sbe-89-alaska-bounces at sea.sbe16.org><mailto:sbe-89-alaska-bounces at sea.sbe16.org> On Behalf Of Pearson, Ron via SBE-89-alaska
Sent: Tuesday, July 30, 2024 10:30 AM
To: Stephen Lockwood <lockwood at hatdaw.com><mailto:lockwood at hatdaw.com>; SBE-89-Alaska <sbe-89-alaska at sea.sbe16.org><mailto:sbe-89-alaska at sea.sbe16.org>
Subject: Re: [SBE-89-Alaska] [EXTERNAL] Re: HARRP

Very cool thank you for the cliffs notes

From: Stephen Lockwood <lockwood at hatdaw.com<mailto:lockwood at hatdaw.com>>
Sent: Tuesday, July 30, 2024 10:20 AM
To: Pearson, Ron <RonPearson at iheartmedia.com<mailto:RonPearson at iheartmedia.com>>; SBE-89-Alaska <sbe-89-alaska at sea.sbe16.org<mailto:sbe-89-alaska at sea.sbe16.org>>
Subject: Re: [EXTERNAL] Re: [SBE-89-Alaska] HARRP


They did.   They use NEC4 (if I remember correctly).  It is just classic array physics - just big at these frequencies.  The physics is the same for the nifty flat panel radar arrays or curtain dipole arrays like we use in HF broadcasting.  They just have some very cool software to change the transmitter exciters to provide beam steering, circular polarization, and lots of other cool stuff.  Each dipole has its own transmitter.  180 cross dipoles with 360 10 kW transmitters.

Stephen S. Lockwood, P.E., PMP, President

Hatfield & Dawson Consulting Engineers

9500 Greenwood Ave N, Seattle, WA 98103

Phone 206 783 9151 ext 562 - Mobile 206 399 9440 - www.hatdaw.com<https://urldefense.com/v3/__http:/www.hatdaw.com/__;!!Fhnm7mQ!YevFlM_ZEfDefuiwzTJkzkf3AD_m2gz3bNuRV1vBloyNl5i_dk3lqxRT4g9XVBQQvAF9JlCoiH0A9Sxn42qDMt_OlQ$>
On 7/30/2024 9:44 AM, Pearson, Ron wrote:
Hello Stephen,

Was it awesome, did they go over finite element (MOM) models and programming on how the array was built and modeled and the conceptual motivation for the design?

Thank you 😊
Ron

From: SBE-89-alaska <sbe-89-alaska-bounces at sea.sbe16.org><mailto:sbe-89-alaska-bounces at sea.sbe16.org> On Behalf Of Stephen Lockwood via SBE-89-alaska
Sent: Wednesday, July 24, 2024 7:11 AM
To: Pierre Lonewolf <lonewolf at otz.net><mailto:lonewolf at otz.net>; SBE Chapter 89 Alaska <sbe-89-alaska at sea.sbe16.org><mailto:sbe-89-alaska at sea.sbe16.org>
Subject: [EXTERNAL] Re: [SBE-89-Alaska] HARRP

Did you find a ride?
Stephen Lockwood
On Jul 21, 2024, at 19:41, Pierre Lonewolf via SBE-89-alaska <sbe-89-alaska at sea.sbe16.org<mailto:sbe-89-alaska at sea.sbe16.org>> wrote:

Is anyone from Anchorage driving to the HARRP tour? I finally looked at the map and why am I going to Fairbanks!?



Pierre Lonewolf

PO Box 983

393B Whittier Street

Kotzebue, Alaska 99753-0983



19074120859 cell

19074423603 fax

Lonewolf at otz.net<mailto:Lonewolf at otz.net>

Plonewolf55 at gmail.com<mailto:Plonewolf55 at gmail.com>



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