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Comet CA-2x4SR Mobile Antenna vs Signalplus Discone Antenna 25–1300 MHz

The Comet CA-2x4SR is the better pick for anyone transmitting on 2m and 70cm from a vehicle. It is a tuned dual-band mobile whip with real gain, a fold-over hinge and a 150 W rating, and owners treat Comet's build as reliable. The Signalplus discone is a receive-first wideband antenna: it hears 25–1300 MHz including airband, CB and 1090 MHz, but its 3.5 dBi figure is nominal and it is not a gain antenna for any one band. Choose the Comet for transmit range and durability on the road; choose the Signalplus to listen across many bands from one fixed antenna.

  • Choose the Comet CA-2x4SR if you transmit on 2m or 70cm from a vehicle and want gain, a fold-over hinge and a UHF mount that fits standard mobile mounts.
  • Choose the Signalplus discone if you mainly listen and want one antenna covering HF, airband, VHF, UHF, GMRS and 1090 MHz, with cable and mounting hardware included.

Prices

  • Comet CA-2x4SR Mobile Antenna: $94.99 at Amazon (last seen Nov 10)
  • Signalplus Discone Antenna 25–1300 MHz: $145.00 at Amazon (last seen Nov 10)
  • Difference: the Comet CA-2x4SR Mobile Antenna is $50.01 cheaper than the Signalplus Discone Antenna 25–1300 MHz at the latest prices (Nov 10)
Comet
Comet Antenna CA-2x4SR 2m/70cm/CB/Scanner Antenna

Comet CA-2x4SR Mobile Antenna

Comet Antenna CA-2x4SR 2m/70cm/CB/Scanner Antenna

$94.99at AmazonChecked Nov 10
See all prices and details
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Pros
  • Real gain on 2m and 70cm
  • Low SWR across the ham bands
  • Fold-over hinge for garages and drive-throughs
  • Handles 150 W
  • Standard UHF mobile mount
Cons
  • No cable included
  • Not a wideband scanner antenna
  • 40 in whip needs a solid mount
Signalplus
Scanner Antenna/Discone Antenna/GMRS Antenna with 10meter Cable PL-259 SMA, 25~1300 MHz Support CB, HF, AIR, UHF, VHF, FM, AM, FRS, GMRS, 1090MHz

Signalplus Discone Antenna 25–1300 MHz

Scanner Antenna/Discone Antenna/GMRS Antenna with 10meter Cable PL-259 SMA, 25~1300 MHz Support CB, HF, AIR, UHF, VHF, FM, AM, FRS, GMRS, 1090MHz

$145.00at AmazonChecked Nov 10
See all prices and details
Visit Amazon

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

Pros
  • One antenna for 25–1300 MHz
  • Includes 10 m cable and mounting hardware
  • Handles 200 W
  • Stainless steel and aluminum build
  • Owners report it works as advertised
Cons
  • No gain on any single band
  • Large and heavy for portable use
  • One reviewer says the brand was not as advertised
  • Not a substitute for a tuned transmit antenna

What separates them

Comet CA-2x4SR Mobile AntennaSignalplus Discone Antenna 25–1300 MHz
Antenna typeTuned dual-band mobile whip for 2m and 70cmWideband discone for 25–1300 MHz
Gain3.8 dBi on 2m, 6.2 dBi on 70cm3.5 dBi nominal across the whole range
Transmit useRated 150 W, SWR 1.5:1 or less on 144–148 and 440–450 MHzRated 200 W, SWR under 1.5:1, but not tuned per band
MountingUHF male base (PL-259), mobile mount, 40 in tall with fold-overFixed discone, 1.7 m tall, 1.35 kg, mounting hardware included
Cable in the boxNone; connects directly at the base10 m PL-259 male to PL-259 female cable included
Band coverage2m and 70cm only; CB and scanner receive is incidentalCB, HF, airband, VHF, UHF, FRS, GMRS and 1090 MHz
BuildSlim whip, fold-over hinge, proven mobile designStainless steel and aluminum discone; owners call it well made
Owner feedbackLong-standing reputation among mobile operators4.5 of 5 from 35 reviews; one says the brand was not as advertised

Price history

  • Comet CA-2x4SR Mobile Antenna: lowest $94.99 on Nov 10 at Amazon.
  • Signalplus Discone Antenna 25–1300 MHz: lowest $87.20 on Nov 10 at Walmart.

Prices at every store

Comet CA-2x4SR Mobile Antenna

  • AmazonNew

    Availability unknown

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

    $94.99Free shippingChecked Nov 10
    Visit Amazon
Prices and history →

Signalplus Discone Antenna 25–1300 MHz

  • WalmartNew

    In stockSold by Jia Jia

    $87.20Free shippingChecked Nov 10
    Visit Walmart
  • AmazonNew

    Availability unknown

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

    $145.00Free shippingChecked Nov 10
    Visit Amazon
All 2 stores and price history →

Specs compared

SpecComet CA-2x4SR Mobile AntennaSignalplus Discone Antenna 25–1300 MHz
SWR1.5:1 or less SWR: 144-148/440-450MHz<1.5:1
Antenna TypeDual-band—
Antenna ColorBlack—
Mobile Antenna Height40.000 in.—
Mobile Antenna BaseUHF—
Power Rating150 watts—
Fold-OverYes—
2m Frequency Coverage140-160 MHz—
70cm Frequency Coverage435-465 MHz—
2m Gain3.8 dBi—
70cm Gain6.2 dBi—
ConnectorUHF Male Base (PL-259)—
Show all 30 specsShow fewer specs
SpecComet CA-2x4SR Mobile AntennaSignalplus Discone Antenna 25–1300 MHz
Product Warranty—For warranty information about this product, pl…
Wideband covering bands—25-1300 MHz
Gain—3.5dBi
Polarization—vertical
Max power—200 Watts
impedance—50Ω
Antenna Connector—UHF female (SO-239) (PL-259)
Antenna Length—1.7meters
Weight—1.35kg
Cable Length

What reviewers say

Comet CA-2x4SR Mobile Antenna

Owners of the CA-2x4SR generally report it works well across 2m, 70cm and scanner bands, with low SWR on the ham frequencies. Complaints center on its height and the need for a good mount and ground plane.

What people mention
  • SWRPraisedOwners report low SWR on the 2m and 70cm ham frequencies.
  • Receive coveragePraisedUsers like that it hears scanner and CB frequencies beyond the ham bands.
  • HeightCriticisedAt 40 inches it draws attention and can hit low branches.
  • MountingMixedResults vary with the mount and ground plane used.

Signalplus Discone Antenna 25–1300 MHz

Owners rate it well, calling it well made and performing as advertised, with one saying it worked better than expected for its size. One reviewer said the brand was not as advertised.

What people mention
  • Build qualityPraisedOwners describe the stainless steel and aluminum construction as solid and well made.
  • PerformancePraisedReviewers say it performs as advertised, and one found it better than expected for its size.
  • Brand labelingCriticisedOne reviewer said the brand was not as advertised.

Questions and answers

Which is better for a car?
The Comet. It is a 40 in mobile whip with a fold-over hinge and a UHF base that fits standard mounts. The discone is a fixed 1.7 m antenna meant to stay in one place.
Can the Signalplus discone transmit on 2m and 70cm?
It is rated for 200 W and covers those bands, but it is not tuned for them and offers no gain. For regular ham transmit use, the Comet performs better.
Which hears more bands?
The Signalplus. It covers 25–1300 MHz, including CB, HF, airband, FRS, GMRS and 1090 MHz aircraft tracking. The Comet is built for 2m and 70cm.
Which lasts longer outdoors?
The discone is stainless steel and aluminum and is designed to stay mounted outside. The Comet is a vehicle whip and its hinge and whip take more wear in daily mobile use.
Is the Comet worth stepping up to?
Yes if you transmit on 2m or 70cm. Its gain, low SWR on the ham bands and fold-over hinge are things the discone does not offer.
Do I need extra cable for the Comet?
Yes. It connects at a UHF male base with no cable in the box. The Signalplus includes 10 m of PL-259 cable.

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—
10meters;
Cable connector—PL-259 male to PL-259 female
Antenna—Discone Antenna
AntennaDescription—Discone Antenna
Brand—SIGNALPLUS
Color—25–1300MHz with 10meters cable
Item Weight—2 kg
Manufacturer—SIGNALPLUS
Maximum Range—10 meters