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

[Stephen Lockwood]

Nautel insist on toroidal ferrites on the coax headed to the antenna.  
As this keeps Thor from killing the MOSFETS.  As the HAARP Transmitters 
are tubes they are not quite a sensitive.  They are designed to operate 
anywhere on the smith chart for load impedance...  In fact off the smith 
chart as they can work with a negative impedance (power being fed back).

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

On 7/30/2024 1:14 PM, Pearson, Ron wrote:
>
> 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>
>     *Sent:* Tuesday, July 30, 2024 10:20 AM
>     *To:* Pearson, Ron <RonPearson at iheartmedia.com>; SBE-89-Alaska
>     <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> 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
>
>             Plonewolf55 at gmail.com
>
>               
>
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>
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