The King of QRO AM

Discussion in 'Amplitude Modulation' started by W7TFO, Aug 4, 2016.

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  1. W7TFO

    W7TFO Premium Subscriber QRZ Page

    The HARP facility is slated to go back to work next year.

    I've had the pleasure of Steve W4YHD's company on several occasions, and he is the chief design engineer for the plant.

    Lotsa oomph from no less than 720 Eimac 4CX10,000 tets in linear mode, co-phased into a NVIS array. Yep, 720 total singing their air-cooled hearts out making 3600 kW up to 10 MHz.

    You don't want to know how much Diesel they burn to run all those TX....

    73DG View attachment 312135
     

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    N6YW likes this.
  2. N6YW

    N6YW Ham Member Volunteer Moderator QRZ Page

    Life is too short for QRP.
     
  3. K8ERV

    K8ERV Ham Member QRZ Page

    Do I get my choice of which bird is for dinner?

    TOM K8ERV Montrose Colo
     
  4. WR2E

    WR2E Ham Member QRZ Page

    Only if your preference is VERY well done!
     
  5. W2VW

    W2VW Ham Member QRZ Page

    I think Arecibo does a much better job of cooking birds.
     
    N6YW likes this.
  6. KJ4VTH

    KJ4VTH Ham Member QRZ Page

    Steve made a presentation to our club some years ago.
    And I've got a "QSL card" from HAARP. :)
     
    N6YW likes this.
  7. KC9UDX

    KC9UDX Platinum Subscriber Platinum Subscriber Life Member QRZ Page

    The receiver?
     
    WR2E likes this.
  8. W2VW

    W2VW Ham Member QRZ Page

    "Arecibo Observatory has capability to provide planetary scale radar imaging. They have 2 powerful transmitters and combined with very high gain ( 72 dBi at 2.38 Ghz) the effective radiated power can be up to 20 TW at 2.38 GHz."

    http://ag1le.blogspot.com/2014/04/visit-to-arecibo-observatory.html
     
    W7UUU likes this.
  9. KD0DQZ

    KD0DQZ Ham Member QRZ Page

    Filament demand alone for that rig must be impressive enough.

    They should add a plate modulator:)
     
  10. W7TFO

    W7TFO Premium Subscriber QRZ Page

    That might be tough with 310 some-odd transmitters....

    With that big a multi-mode design, who cares about HLPM?

    The coolest thing is the steerable phased array capable of almost horizontal beaming.

    2 people is all that are needed run the whole RF thing, and a crew of 5 tend the big generators.

    Dennis
     

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