Tube Feed Line Chokes

CUBE™ Vertical Antenna Feed Line Choke, 1.8-61 MHz, 1.5KW

SKU CUV-1-1500
$119.95
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CUBE™ Vertical Antenna Feed Line Choke, 1.8-61 MHz, 1.5KW
Product Details
UPC: Does not apply
Brand: Palomar Engineers
MPN: CUV-1-1500, CUV-1-5000
Type: New
Country/Region of Manufacture: United States
Effective Frequency Range (MHz): 1-61 MHz
PEP Power Rating (watts): 15005000
Estimated Insertion Loss (db): .10
Input Connector Type: SO-239 female
Output Connector Connector Type: 1/4" stud/wing nut
Ground Connector (Y/N): 1/4 stud/wing nut
Enclosure Size (LxWxH inches): 4 x 4 x 2

Feed Line Chokes for Vertical Antenna with radials/counterpoise

Feed line chokes for verticals require a special arrangement to isolate the coax feed line from the radials and ground system. Schematically, a good feed line choke for verticals with radials should be built as follows:

Vertical Antenna Schematic 2 259x300 - Tube Feed Line Chokes

Our CUV-1-1500 and CUV-1-5000 feed line chokes are all internally connected to isolate the coax feed line as shown above.


1500 Watt Rated 1:1 Feed line Choke (Unun) for Verticals with radials

Th CUV-1-1500 unun is a common mode feed line choke for vertical antennas with radials that need to be isolated from the coaxial feed line to keep common mode current from using the coaxial braid as another radial. Very effective with high choking of 1K-5K from 1.8-61 MHz and also incorporates two side studs/wingnut terminals for radial or ground connection at the antenna while isolating the coax feed line braid from the radials via the internal common mode feed line choke. Top terminal with stud/wingnut for vertical connection enclosed in a 4″ x 4″ x 2″ box..


To reduce receiver common mode noise for long runs of coax to your antenna, use a MC-1-1500 or CU-1-1500 feed line choke at the station end of the coax.

TUBE feed line chokes/Line Isolators are used to suppress common mode current carried on the outside of the  coax braid which is often responsible for receiver noise and RFI in the receiver/transmitter. These chokes are very useful for suppressing RFI common mode current at the antenna feed point, at 1/4 wavelength intervals along the coax feed line and also at the entrance to the radio station.  They are available with various input and output connectors so as to conveniently connect to standard output connectors already installed on your feed line.

Palomar Engineers TUBE feed line chokes are designed to have 2-5 times more choking impedance over a broader frequency range than competitor units in similar packaging.  Each choke has the choking impedance and effective frequency range on the product label so you can choose the product best suited for your application.