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

Store/Antenna Products/Coax Feed Line Common Mode Chokes/CUBE & Bullet Baluns/Ununs (1:1)

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

Name: CUBE™ Vertical Antenna Feed Line Choke, 1.8-61 MHz, 1.5KW
Brand: Palomar Engineers
SKU: CUV-1-XXXX
Price: 109.95 USD
Availability: InStock

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:

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.

When considering solutions for AM broadcast (550 Khz – 1.8 Mhz) you should consider Mix 77 ferrites available in a variety of shapes and sizes. Choose a size to give the maximum number of turns of the affected wire or cable.

AM broadcast transmits on a low frequency with large antennas. Consequently it takes a large antenna to receive the signals. Typical “antennas” are AC house wiring, phone lines, long satellite or cable TV cables, DSL/CAT5 lines running between rooms, etc. The device wires that connect to these “antennas” need to be choked with as many turns through the ferrite as possible. Some installation examples are shown below on this page.

For AC/ DC power cords and coax cables the F240-77 (2.4″ OD, 1.4″ ID) “Donut” toroid is the most popular. Also available are smaller toroid donuts and Mix 77 beads. Shown below is a graph with 8, 10, and 12 turns through the toroid – obviously more turns has higher choking impedance. Mix 77 toroid products are HERE and Mix 77 small beads (for small wires) are HERE

F240 77 Turns Comparison 1024x648 - AM Broadcast RFI Kits

F240-77 Turns Comparison from .1 – 8.1 Mhz

Shown below is a graph of frequency response verses choking magnitude for a F240-77 in the AM Broadcast band for a 12 turn coil around the toroid. (Same info as above but different frequency range).