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Diamond
Diamond Antenna K400SNMO Heavy-Duty Antenna Mount

Diamond Antenna K400SNMO Heavy-Duty Antenna Mount

Best price now

$86.99at AmazonChecked 2 h ago

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Price facts

  • Lowest price today: $86.99 at Amazon (checked Nov 10, 2026).
  • Our take on the Diamond Antenna K400SNMO Heavy-Duty Antenna Mount

    The Diamond K400SNMO is a heavy-duty lip or hatchback mount for mobile ham and scanner antennas. It clamps onto a trunk lid, hatch or door edge with set screws and a rubber pad, so no drilling is needed, and a two-axis joint lets you angle the antenna. It handles up to 700W PEP SSB and suits larger HF, VHF and UHF whips. Compared with lighter lip mounts, it is beefier and holds bigger antennas more steadily, but it is heavier and bulkier at the mounting point.

    Best forHam radio operators running HF or VHF/UHF mobile antennasDrivers who don't want to drill holes in the carOwners of larger, heavier whip antennasTemporary or transferable setups between vehicles
    Pros
    • No drilling: clamps to trunk, hatch or door edges
    • Two-axis adjustment for angling the antenna
    • Four set screws hold larger antennas firmly
    • Rubber pad protects the paint
    • Rated to 700W PEP SSB
    • SO-239 base with SMA-to-UHF adapter included
    Cons
    • Heavier and bulkier than basic lip mounts
    • Set screws can mark or dent thin panels if overtightened
    • Needs a solid, flat edge to grip well
    • Coax and antenna not included

    Diamond Antenna K400SNMO Heavy-Duty Antenna Mount prices at every store

    • AmazonNew

      Availability unknown

      As an Amazon Associate, Deal.ai earns from qualifying purchases.

      $86.99Free shippingChecked 2 h ago
      Visit Amazon

    Diamond Antenna K400SNMO Heavy-Duty Antenna Mount price history

    Lowest price we've seen: $86.99 on Nov 10 at Amazon. Tracked across 1 store since Nov 10.

    What reviewers say

    Owners of this mount generally report it holds larger antennas securely without drilling and stays put at speed. Some note it is heavy and that the set screws need care on thin sheet metal.

    What people mention
    • BuildPraisedOwners say the mount feels solid and holds larger antennas without wobble.
    • InstallationPraisedReviewers like that it clamps on with no drilling and can move between vehicles.
    • WeightMixedSome find it heavier and bulkier than simpler lip mounts.
    • Set screwsCriticisedA few warn the set screws can mark paint or dent thin panels if overtightened.
    • AdjustmentPraisedThe two-axis joint is seen as handy for getting the antenna upright.

    Specifications

    Ports
    SO-239 base, SMA to UHF adapter
    Model Number
    K400S
    Type
    Mobile Mount
    Dimensions
    6 in (depth)
    Durability
    Rubber mounting pad protects mounting surface
    Form Factor
    Hatchback/Trunk Mobile Mount
    Weight
    1.15 lbs

    Questions and answers

    Does it require drilling?
    No. It clamps onto a trunk lid, hatch or door edge with set screws and a rubber pad.
    What antennas can it hold?
    It is rated for HF, VHF and UHF mobile antennas up to 700W PEP SSB, including larger whips.
    What connector does it use?
    The base is SO-239, and an SMA-to-UHF adapter is included.
    Is coax included?
    No. You supply the coax and the antenna.
    Will it fit my car?
    It needs a flat, sturdy edge of suitable thickness. Check your trunk or hatch lip before buying.
    Can I move it between vehicles?
    Yes. The clamp design lets you remove and refit it, though repeated tightening wears on thin panels.
    Where is the Diamond Antenna K400SNMO Heavy-Duty Antenna Mount cheapest?
    At Amazon, for $86.99, as of our latest check.

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    Design Type
    Mobile Mount
    Design Highlights
    No holes/drilling required, 2-axis adjustment
    Build Quality
    Four set-screws insure mount strength for larger antennas
    Wattage
    700W PEP SSB
    Typical Users
    Professionals, Amateurs