WD-330J

The Diamond WD-330J is a T3FT (Tilted Terminated Folded Dipole)  for HF.  As such it effectively offers a "no tune" antenna covering most the HF frequency range.; the WD-330J offers operation between 2 and 30 MHz at less than a 3:1 SWR on frequencies in this range, offering the option of not needing an antenna tuner.  This makes it ideal for areas where multiple antennas are not practical, or for remote sites when frequency agility is required.

The WD330J may be mounted in a horizontal, inverted V or sloper configuration.  If mounted as a sloper ( tilted ), the radiation pattern is roughly omnidirectional. 

Performance can not match a full size resonant antenna, and some transmit power is lost to the termination resistor ( the termination allows for the very wide operational bandwidth at reasonable SWR). 

The WD-300J comprises a wire folded dipole with fibreglass spreaders.  At the feedpoint, an impedance transforming balun with UHF female socket provides connection to the feedline ( coax cable not supplied with this antenna ), and the other ends of the antenna wires terminate on a sealed resistor container.  The antenna weighs approximated 3.1kg.

Specifications:

• Frequency Range: 2.0 MHz - 30 MHz
• Power: 150W (PEP)
• Impedance: 50 Ohms
• Length: 25 metres
• SWR <2:1 (from 1.8 to 18 MHz)
• SWR <3 :1 (from 18 to 30 MHz)
• Connector: UHF Female