Description

• A 4-element UHF Yagi antenna for PMR/Trunked Radio and Telemetry.
• Produced to the highest quality standards, these robust antenna designs will ensure reliable operation in harsh environmental conditions.
• Former Skymasts brand product.

Specification

Electrical
Model	S.4Y-420
Frequency	410 – 430 MHz
Max. Input Power	150 W
3 dB Beamwidth, H-Plane	74 °
Polarisation	Linear (Vertical or Horizontal)
3 dB Beamwidth, E-Plane	57 °
Impedance	50 Ω
Gain	7 dBd (9.2 dBi)
VSWR	< 1.5:1
Front-To-Back Ratio	> 15 dB
Antistatic Protection	All metal parts DC-grounded (Connector shows a DC-short)

Environmental
Ingress Protection	IP68

Mechanical
Connection(s)	N(f) on 3m RG213/U cable
Materials	Boom, 32 mm dia. aluminium elements, 12.7 mm dia. aluminium balun, fully moulded enclosure
Length	Approx. 935 mm / 36.811 in.
Historic Brand	Skymasts
Wind Load	75 N (160 km/h)
Weight	Approx. 1.5 kg / 3.31 lb.
Mounting Bracket	3202078/68 + 3201079/00 (Ordered Separately)
Balun Encapsulant	Polyurethane Resin U-600
Alternate Mounting Bracket	0900912/00, 0302032/68, or 0300064/00 + U-Bolts to match mounting pipe diameter (Ordered Separately)

Ordering Codes

Model	Product No.
4 element Yagi antenna 410 – 430 MHz	S.4Y-420