50:300 (6:1) CUBE™ Balun, 1-61 MHz, 1.5/3KW (choose top stud/eyebolt/power rating)

Name: 50:300 (6:1) CUBE™ Balun, 1-61 MHz, 1.5/3KW (choose top stud/eyebolt/power rating)
Brand: Palomar Engineers
SKU: CB-6-1500
Price: 109.95 USD
Availability: InStock

Store/Antenna Products/CUBE Impedance Transformers (<1:1, 1:1, >1:1)/Off Center Fed Dipole Transformers

SKU CB-6-1500TS

$109.95

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List price ~~$149.95~~

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Select Output Connector

Eyebolts (2) side, 1 on top for hoist

Top studs (2) with wing nuts

PEP Rating

1500 Watts

3000 Watts

Quantity:

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Quantity	Price per item	Discount
2 items	$99.95	9% off
10 items	$89.95	18% off
100 items	$79.95	27% off

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50:300 (6:1) CUBE™ Balun, 1-61 MHz, 1.5/3KW (choose top stud/eyebolt/power rating)

Store/Antenna Products/CUBE Impedance Transformers (<1:1, 1:1, >1:1)/Off Center Fed Dipole Transformers

Product Details

MPN: CB-6-1500,CB-6-3000

Input ohms/Output ohms: 50 in, 300 out

Frequency Range < 2:1 SWR (MHz): 1-61

PEP Power Rating (watts): 1500/3000

Weight (pounds): 1500=2#, 3000=4 #

1500/3000 Watt 6:1 CUBE Balun™ – Model CB-6-1500/3000

Model CB-6-1500/3000 is a 6:1 (300:50) balun housed in a NEMA enclosure box (1.5KW in 4″ x 4″ x 2″, 3KW in 6" x 6" x 4") with two top studs capable of input power levels up to 1.5KW PEP watts when used with a matched load. The 6:1 ratio takes 50 ohms input and matches to 300 ohms balanced output from 1-61 MHz with SWR < 1.5:1 under matched load conditions. A great balun for windoms, OCF antennas >60 feet over ground, Hertz and folded dipole antennas, T2FD etc. 8 core, Use “EB” version with side eye bolts for wire attachments for OCF dipole use.

Typical SWR and impedance transformation from 1-61 MHZ shown below:

CB 6 1500 Graph png - AM Broadcast RFI Kits

This transformer requires a feed line choke to isolate the coax feed line from the antenna. A coax noise filter is also recommended.

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).