136-174 MHz Dipole antennas DH1 VHF, DH2 VHF, DH4 VHF : Radial :

Electrical specifications

Model	DH1 VHF	DH2 VHF	DH4 VHF
Operating frequency band, MHz	136-174
VSWR, not more than	1.5
Gain OFFSET, dBi	5.15	8.15	11.15
Sector , -3dB:
in vertical plane	75°	37°	18°
in horizontal plane	132°
Impedance, Ohm	50
Max. power input, W	100

Mechanical specifications

Model	DH1 VHF	DH2 VHF	DH4 VHF
Weight, kg	0.97	2,8	5,6
Height/Length, M	0.73-0.99	2.25-2,9	5,3-6,9
Construction material	Aluminium alloy, D16T
Mast diametr, mm	25-55
Rated wind velocity, m/s	45
Wind loading area, m²	0.022	0.045	0.09
Load of side wind 45 m/s, H	25	51	102
Rated wind velocity with 0.5" icing, m/s	28
Temperature range, °C	from -50 to +50
Connector	SO-239	N-female	N-female

Antenna DH1 VHF is half-wave continuous dipole with shunt power supply (gamma-transformer). It is designed for lateral mounting and array antenna constructing. Antenna has collapsible construction and grounded totally. Tuning is conducted by setting vibrator length according to that specified in supplied diagram. Gamma-transformer usage provides perfect antenna tuning. Steel zinc-coated mounting device provides reliable mounting.
Antenna DH2 VHF and DH4 VHF is two and four-component array antenna, with DH1 VHF as main structural component. These antennas can be used for circular pattern generation as panel antennas for lateral mount on radiopaque towers. Supplied with adders TK-72V and TK-74V.

DH1 VHF E-plane pattern	DH2 VHF E-plane pattern
DH4 VHF E-plane pattern	DH1 VHF H-plane pattern
VSWR diagram, DH1 VHF	VSWR diagram, DH2 VHF

136-174 MHz Dipole antennas DH1 VHF, DH2 VHF, DH4 VHF

Electrical specifications

Mechanical specifications

DH1 VHF E-plane pattern

DH2 VHF E-plane pattern

DH4 VHF E-plane pattern

DH1 VHF H-plane pattern

VSWR diagram, DH1 VHF

VSWR diagram, DH2 VHF

VSWR diagram, DH4 VHF