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Introduction
The
DXE-FCC050-H05-A
Feedline Current Choke (FCC), using Maxi-Core
®
technology, prevents
unwanted RFI in 50 Ω, coaxially fed antenna systems. It provides excellent feedline decoupling and
low loss performance from 1 to 60 MHz. It is power-rated for 2 kW continuous, 5 kW intermittent.
The FCC has significantly higher common mode impedance and a larger effective core area than
similar line isolators, including conventional enameled wire or bead baluns. This results in:
Higher power handling with lower loss – more power to the antenna
Improved antenna bandwidth – easier on the radio
Reduced RFI – less interference to and from your radio
Compensate for a less than optimal ground system – Stop feedline radiation
If you suffer from RF interference, such as a "hot" mike or other equipment, disturbing audio
equipment in your house or your neighbors while transmitting, your feedline may be acting as part
of your antenna system. While most common advice is to improve the station’s RF ground, the root
of the problem is in the poor isolation of the feedline from antenna currents. In other cases, as the
coax feedline travels through the near-field of the antenna, the current can be re-introduced to the
feedline after the balun. If your SWR is already low and you wish to reduce feedline radiation and
improve reception, an FCC is recommended.
The FCC can be used with many varieties of antennas including verticals with elevated radials and
center-fed vertical dipoles (half-wave verticals).
The FCC comes in a formed aluminum case with a grounding post, PTFE / Silver SO-239
connectors and stainless steel hardware.
Installation
Install the DX Engineering Feedline Current Choke at the point where the feedline exits the area of
the antenna. One end of the FCC has an isolated SO-239 connector; the opposite end has the SO-
239 attached directly to the FCC enclosure.
Isolated Connector Direct Mounted Connector and Ground Terminal
