#SUBMARINE VLF RECEIVER PROFESSIONAL#

The antenna is built from aluminium tube and stainless steel fittings with two polycarbonate boxes housing the amplifier and common mode choke. A hybrid transformer is used to provide two RF outputs to feed two receivers. This allows a 12V DC power feed to the fed up the coaxial cable to the antenna with common mode filtering on the DC and RF inputs to minimise noise. A copy of the document may be downloaded here.ДЄ base unit for the receiver end is supplied. The antenna design is based on the reference antenna described in the ITU-R P.845-3 Recommendation document on HF Field-Strength Measurement. It also blocks any RF noise picked up by the coaxial cable from reaching the antenna elements. The antenna current consumption is 15 mA (early versions took 100 mA).ДЄ common mode choke at the base of the antenna isolates the coaxial cable from the antenna element allowing a stable radiation pattern unaffected by the cable run or antenna mount structure.

A base unit allows 12V power to be fed up the coaxial cable feeder to the antenna. The antenna is a short vertical dipole antenna 1.8m (70') high with a built-in low noise high dynamic range RF amplifier.

#SUBMARINE VLF RECEIVER PROFESSIONAL#

The antenna can be used for all VLF, LF, MW and HF professional monitoring and short wave listening. This one shows KP2M on 160m switching between his vertical and a Beverage antenna. He also has several links comparing it with his Beverage antennas. Here is a link to his YouTube video showing his CW Skimmer set-up. One of our customers, Andy, DL8LAS uses one for his CW Skimmer station. This allows you to use a short vertical element up to say 7.5 m and a ground rod to make a very effective LF and HF antenna. It has been replaced by the High Z Antenna Amplifier.

We no longer make the Active Vertical antenna.

Submarine vlf receiver