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  1. Motorsports Market
    https://motorsportsmarket.com/racecars/1973-adf...

    1973 ADF Formula Ford – 1973 SCCA National Champion

  2. Images of ADF Vintage

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  3. Etsy
    https://www.etsy.com/market/adf_jewelry

    Adf Jewelry - Etsy

  4. Aircraft Systems
    https://www.aircraftsystemstech.com/2017/05/...

    Aircraft Automatic Direction Finder (ADF) - Aircraft Systems

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    Automatic Direction Finder
    Radio direction finder
  5. Etsy
    https://www.etsy.com/au/market/adf_jewelry

    Adf Jewelry - Etsy Australia

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    Jewellery
  6. eBay
    https://www.ebay.com/sch/i.html?_nkw=vintage+adf...

    37 results for vintage adf receivers - eBay

  7. eBay
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    Vintage & Antique Jewelry for sale - eBay

    Get the best deals on Vintage & Antique Jewelry when you shop the largest online selection at eBay.com. Free shipping on many items | Browse your favorite brands | affordable prices.

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  8. People also ask
    What is an automatic direction finder (ADF)?
    An automatic direction finder (ADF) operates off of a ground signal transmitted from a NDB. Early radio direction finders (RDF) used the same principle. A vertically polarized antenna was used to transmit LF frequency radio waves in the 190 kHz to 535 kHz range. A receiver on the aircraft was tuned to the transmission frequency of the NDB.

    Aircraft Automatic Direction Finder (ADF) - Aircraft Systems

    aircraftsystemstech.com
    How does the ADF work?
    It will do exactly what its name says. The ADF automatically points in the direction of the NDB (Non-Directional Beacon) you tune in — roughly the same way a kid will continually to point to his favorite toy store while you try to drive past it. A ground station is shown on the charts as Non-Directional Beacon (NDB).

    Automatic Direction Finders: The grandfather of all radio navigation

    aviationpros.com
    What is ADF mode?
    In the ADF mode, both the loop and the sense antennas are used, the pointer is activated, and the ADF tries to point to the station. (This is the normal mode of operation.) Rotating the loop antenna control switch in either the left or right direction will cause the loop antenna and pointer to move left or right.

    Automatic Direction Finders: The grandfather of all radio navigation

    aviationpros.com
    What type of antenna is used for ADF?
    Any ground antenna transmitting LF or MF radio waves in range of the aircraft receiver’s tuning capabilities can be used for ADF. This includes those from AM radio stations. Audible identifier tones are loaded on the NDB carrier waves. Typically a two-character Morse code designator is used.

    Aircraft Automatic Direction Finder (ADF) - Aircraft Systems

    aircraftsystemstech.com
    Is the old ADF a good radio navigation aid?
    Yes, the trusty old ADF can trace its roots back to the late 1920's. It is the grandfather of all radio navigation aids. In fact, it's been around so long that I bet many of you have forgotten how an ADF system works or, why it needs both a loop antenna and a sense antenna. And, what the heck is that BFO mode good for anyway?

    Automatic Direction Finders: The grandfather of all radio navigation

    aviationpros.com
    What radio band does an ADF receive?
    The ADF will also receive the standard AM broadcast band at 550 to 1600 kHz. Land-based aeronautical navigation aids such as VORs and NDBs have a two- or three-letter identifier broadcast in Morse code. Some NDBs also broadcast audio, usually weather information. Here's a tip — Get a local VFR sectional chart.

    Automatic Direction Finders: The grandfather of all radio navigation

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  9. shopeclectiques.com
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    eclectiques

    The 8000 sq ft shop is home for quirky and eclectic vintage homewares and furnishings found by over 65 individual vendors and local makers. From retro furniture and accessories to second–hand, salvaged, vintage clothing, and …

  10. demarsvintage.com
    https://www.demarsvintage.com

    DEMAR'S VINTAGE, ANTIQUES & HANDMADE - A curated …

  11. eBay
    https://www.ebay.com/itm/166842258564

    Narco ADF -31A ADF VINTAGE AIRPLANE AVIONICS …

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  12. Aviation Pros
    https://www.aviationpros.com/aircraft/article/...

    Automatic Direction Finders: The grandfather of all radio …

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    Automatic Direction Finder
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