80-10 Meter Loop Antenna System with 4:1 Balun and Choke Combo, 3-30 MHz, 500/1500/5000 PEP Option

Name: Off Center Fed (OCF) 4:1 Balun and Choke Combo, 1.8-61 MHz, 1.5/3/5KW PEP
Brand: Palomar Engineers
SKU: PAL-LOOP8010
Price: 199.95 USD
Availability: InStock

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SKU PAL-LOOP8010-500

$199.95

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80-10 Meter Loop Antenna System with 4:1 Balun and Choke Combo, 3-30 MHz, 500/1500/5000 PEP Option

Store/Best Sellers

Product Details

MPN: PAL-8010LOOP-500, -1500, -5000

Country/Region of Manufacture: USA

Input ohms/Output ohms: 50 in/200 out

Frequency Range < 2:1 SWR (MHz): Balun rated at 1.8-61 MHz for 1.5KW, 1.8-31 MHz for 3KW/5KW

PEP Power Rating (watts): 500W/1.5KW/5KW

Input Connector: SO-239

Output Connector(s): Eyebolts/Wing Nut

Hardware Type: Stainless Steel

Enclosure Size: 4"x4"x 2"(1.5KW), 4"x 4" x 4"(1.5KW/5KW)

80-10 Meter Loop antenna (288' wire) + 500/1500/5000 Watt PEP rated 4:1 Current Balun + internal 1:1 Current Balun in one enclosure + 6 insulators for support

* Complete package - just add coax

* works multiple bands with ease

* can be configured as delta, square, rectangle or multi-sided horizontal loop (6 insulators included)

* Choice of 500, 1.5K, or 5KW PEP rated baluns to suit power needs

* No need for extra feed line choke as it is built into the 4:1 balun enclosure

After many requests we have created a compact, special balun for OCF and loop (Skyloop or Delta loop) antennas. The CB-4-1500OCF is a CUBE enclosure containing a multi-core, broadband 4:1 impedance transformer in series with a 1:1 current balun for extra common mode current choking to keep RF current off the outside of the coax braid and on the antenna where it belongs. The extra choking action also means that the coax feed line will not act as a radiator causing unnecessary RF interference (RFI).

1500 watt is in 4" x 4" x 2" enclosure and 5KW is in 4" x 4" x 4" enclosure.

ADD MC-1-3000 Choke for radio end of coax to reduce common mode noise on coax up to 6 "S" units!

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).