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

Tue Aug 6 11:21:35 PDT 2024

Once upon a time, ERI had some Clif notes on the ferrite cores in
rottertiller antennas. A little cloudy after 35 years…

Clyde Plunkett, VP, Tres.

Plunkett Enterprises, Inc.
PEI-ALASKA  Mortgage Field Services
4901 Folker Street
Anchorage, Alaska 99507
907-563-6844
907-563-6845 fax

A proud Sponsor and Member of NAMFS!
Greetings from the "Last Frontier".

On Mon, Aug 5, 2024 at 15:09 Pearson, Ron via SBE-89-alaska <
sbe-89-alaska at sea.sbe16.org> wrote:

> So for instance in a rototiller antenna with a hard wave guide with a TE11
> mode, how is the wave making it out of the rototiller, the thing looks
> completely sealed off and that it would just create a bunch of internal
> reflection.  OR are those nub ends non metallic caps from with which the RF
> goes from contained RF to free space RF?
>
>
>
>
>
> Thank you 😊
>
> Ron
>
>
>
>
>
> *From:* SBE-89-alaska <sbe-89-alaska-bounces at sea.sbe16.org> *On Behalf Of
> *Pearson, Ron via SBE-89-alaska
> *Sent:* Tuesday, July 30, 2024 2:47 PM
> *To:* Stephen Lockwood <lockwood at hatdaw.com>; Charles Sather <
> CSather at knba.org>; SBE-89-Alaska <sbe-89-alaska at sea.sbe16.org>
> *Subject:* Re: [SBE-89-Alaska] [EXTERNAL] Re: HARRP
>
>
>
> I have heard of these things talked about after my transition to EE but
> never could find a great reference on how exactly they worked.
>
>
>
> I get installing single stub series and parallel with either capacitive
> resistive or inductive loads (or simply calculating the coax length) in
> order to eliminate reactive power (which is your imaginary reflected
> power).  I thought inductors had to be connected into the coax and not just
> slid over the outside in order to actually destructively interfere with
> reflected power.
>
>
>
> Additionally, if an RF wave is generated inside of a transmitter via
> electron change of motion and that wave is then guided in a wave guide how
> is that wave dispersed and manipulated in say a rototiller antenna.  The
> root of the radiation is the electron manipulation in the transmitter
> itself.
>
>
>
> *From:* Stephen Lockwood <lockwood at hatdaw.com>
> *Sent:* Tuesday, July 30, 2024 12:38 PM
> *To:* Pearson, Ron <RonPearson at iheartmedia.com>; Charles Sather <
> CSather at knba.org>; SBE-89-Alaska <sbe-89-alaska at sea.sbe16.org>
> *Subject:* Re: [SBE-89-Alaska] [EXTERNAL] Re: HARRP
>
>
>
> 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 <https://www.google.com/maps/search/9500+Greenwood+Ave+N,+Seattle,+WA+98103?entry=gmail&source=g>
>
> 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> <lockwood at hatdaw.com>
> *Sent:* Tuesday, July 30, 2024 12:07 PM
> *To:* Charles Sather <CSather at knba.org> <CSather at knba.org>; Pearson, Ron
> <RonPearson at iheartmedia.com> <RonPearson at iheartmedia.com>; SBE-89-Alaska
> <sbe-89-alaska at sea.sbe16.org> <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 <https://www.google.com/maps/search/9500+Greenwood+Ave+N,+Seattle,+WA+98103?entry=gmail&source=g>
>
> Phone 206 783 9151 ext 562 - Mobile 206 399 9440 - 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>
> <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> <lockwood at hatdaw.com>;
> SBE-89-Alaska <sbe-89-alaska at sea.sbe16.org> <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 <https://www.google.com/maps/search/9500+Greenwood+Ave+N,+Seattle,+WA+98103?entry=gmail&source=g>
>
> 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>
> <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> <lonewolf at otz.net>; SBE Chapter
> 89 Alaska <sbe-89-alaska at sea.sbe16.org> <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:
> <https://www.google.com/maps/search/393B+Whittier+Street+%0D%0A+Kotzebue,+Alaska?entry=gmail&source=g>
>
> 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 <https://www.google.com/maps/search/393B+Whittier+Street+%0D%0A+Kotzebue,+Alaska?entry=gmail&source=g>
>
> Kotzebue, Alaska <https://www.google.com/maps/search/393B+Whittier+Street+%0D%0A+Kotzebue,+Alaska?entry=gmail&source=g> 99753-0983
>
>
>
> 19074120859 cell
>
> 19074423603 fax
>
> Lonewolf at otz.net
>
> Plonewolf55 at gmail.com
>
>
>
> ------------------------------
>
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