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Deal.ai › Diamond Antenna
Diamond Antenna
Diamond Antenna SG7900 2m/70cm/Scanner Antenna

Diamond Antenna SG7900 2m/70cm/Scanner Antenna

Best price now

$38.00at eBayChecked 1 h ago

66% under what the other stores charge

Compared across 6 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission.

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Price facts

  • Lowest price today: $38.00 at eBay (checked Nov 10, 2026).
  • Checked at 6 stores.

Our take on the Diamond Antenna SG7900 2m/70cm/Scanner Antenna

The Diamond SG7900 is a 1.58 m dualband mobile antenna for 2 m and 70 cm, with a 7/8-wave C-Load design on 144 MHz and 7.6 dB gain on 430 MHz. It handles 150 W and supports simultaneous dual-band transmit and receive when paired with a duplexer. The radial-less whip needs a solid body or lip mount, not a magnet mount. It suits hams who want strong 70 cm reach from a vehicle and accept a tall, heavy antenna; shorter dualband whips are easier to park with but give up gain.

Best forHams running 2 m/70 cm mobileOperators wanting high 70 cm gainVehicles with a drilled or lip mountSimultaneous dual-band setups with a duplexer
Pros
  • High 7.6 dB gain on 430 MHz
  • 150 W power handling
  • Radial-less design mounts cleanly
  • Simultaneous dual-band TX/RX with a duplexer
  • Solid UHF connector build
Cons
  • 1.58 m tall, awkward in low garages and drive-throughs
  • 600 g needs a sturdy mount
  • Not for magnet mounts
  • Whip can flex and sway at speed

Diamond Antenna SG7900 2m/70cm/Scanner Antenna prices at every store

  • eBayNew

    In stock

    $38.00+ $3.00 shippingChecked 1 h ago
    Visit eBay
  • apexantennaandaccessories.comNew

    In stock

    $112.95Checked 1 h ago
    Visit apexantennaandaccessories.com
  • GigaParts.comNew

    In stock

    $114.95Free shippingChecked 1 h ago
    Visit GigaParts.com
  • Ham Radio OutletNew

    Availability unknown

    $109.95Checked 1 h ago
    Visit Ham Radio Outlet
  • AmazonNew

    Availability unknown

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

    $136.99Free shippingChecked 1 h ago
    Visit Amazon
  • Walcott RadioNew

    Out of stock

    $109.95+ $25.30 shippingChecked 1 h ago
    Visit Walcott Radio

Store links may earn us a commission.

Diamond Antenna SG7900 2m/70cm/Scanner Antenna price history

Lowest price we've seen: $38.00 on Nov 10 at eBay. Tracked across 6 stores since Nov 10.

What reviewers say

Owners of this class of Diamond mobile whip praise 70 cm reach and build quality, and warn that the length and weight demand a proper mount.

What people mention
  • GainPraisedOwners report noticeably better 70 cm range than shorter dualband whips.
  • HeightCriticisedThe 1.58 m length hits low clearances and is awkward to park with.
  • MountingMixedIt needs a drilled or lip mount; magnet mounts are not recommended for its weight.
  • BuildPraisedBuyers describe the whip and connector as solid and durable.
  • SwayCriticisedSome note the long whip flexes and sways at highway speed.

Specifications

Suitable Location
Mobile
Antenna Type
Mobile Antenna
Antenna Directivity
Omni-directional
Antenna Gain
7.6dB (430MHz)
Antenna Frequency Band
Dualband
Antenna Element Type
7/8 wave double C-Load radialless (144MHz)
Antenna Highlights
Supports simultaneous dual band transmit and receive with duplexer

Questions and answers

Is the SG7900 good for 70 cm?
Yes. It is built around 430 MHz, with 7.6 dB gain and 150 W capacity, so it is the stronger band for this antenna.
Can I use it with a magnet mount?
No. Diamond does not recommend magnet mounts for this antenna. Use a drilled NMO-style body mount or a sturdy lip mount.
Does it need a duplexer?
Only for simultaneous dual-band transmit and receive. A single-radio dual-band setup works without one.
How tall is it?
1.58 m, about 600 g. Check garage and drive-through clearance before fitting.
What connector does it use?
A UHF (PL-259/SO-239) connector, standard on most mobile ham radios.
Is it better than a shorter dualband whip?
It gives more 70 cm gain and power headroom, but a shorter whip is easier to live with in low-clearance vehicles.
Where is the Diamond Antenna SG7900 2m/70cm/Scanner Antenna cheapest?
At eBay, for $38.00, 66% under what the other stores charge, as of our latest check.
Where can I buy the Diamond Antenna SG7900 2m/70cm/Scanner Antenna?
6 stores we checked sell it, including eBay, Ham Radio Outlet, Walcott Radio, apexantennaandaccessories.com, GigaParts.com.

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Installation Location
Vehicle mounting
Mount Type
UHF Connector, Not recommended for use with magnet mount
Dimensions
1.58m (Length)
Weight
600g
Design Highlights
Compact radial-less structure
Impedance
50ohms
Wattage
150W (power capacity)