Vector 4000 (sigma 4)

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Vector 4000 (sigma 4)

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5.0 average, based on 1 reviews


Product Information


Vector 4000 (sigma 4)


Similar to the ”Avanti Sigma IV” this is an extremely powerful and tall 3/4 wave base antenna tunable from 27 to 28.5 MHz. All the various joints of the inverted cone type radials are perfectly waterproofed.

Technical Specifications:

  • Type of Antenna: 3/4 wave
  • Frequency Range: Tunable from 27 to 28.5 MHz
  • Length: (approx.) 8480mm
  • S.W.R.: < 1.2:1
  • Power Rating Max.: 1000 watts (CW) continuous 3000 watts (CW) short time
  • Gain: 2 dBd, 4.15dBi



CB Base station antenna
Factory tuned at mid-band
Tunable by whip length adjusting
High power handling capability
Made of aluminium alloy 6063 T-832
P/N 2100701.00    VECTOR 4000


Electrical Data
Type: 7/8 λ coaxial J-pole
Frequency range: 26-28 MHz
Impedance: 50Ω unbalanced
Radiation (H-plane): 360° omnidirectional
Polarization: vertical
Gain: 2 dBd, 4.15 dBi
Bandwidth at S.W.R. 2:1: 1350 KHz
S.W.R. at res. freq.: ≤ 1.2:1
Max. power:
 1000 Watts (CW) continuous
 3000 Watts (CW) short time
Feed system / position: Gamma match / base
Connector: UHF-female
Mechanical Data
Materials: Aluminium, Steel, Nylon
Wind load / resistance: 329 N at 150 Km/h / 130 Km/h
Wind surface: 0.29 m²
Height (approx.): 9500 mm
Weight (approx.): 4600 gr
Mounting mast: Ø 35-42 mm



We regret that due to the size of the Parcel we can only send this to addresses in UK mainland only

Product CodeVECQ24
ManufacturerSirio Antenna
Stock Level1

Customer Reviews

Average Rating: 5

Vector 4000 Review

For an in depth review of this terrific antenna, please take a look at (Nov 21 2009, 14:41 pm)
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