Antenna Products

Off Center Fed (OCF) 4:1 Balun and Choke Combo, 1.8-61 MHz, 1.5/3/5KW PEP Options, Loop Antennas

CB-4-1500OCF

Off Center Fed (OCF) 4:1 Balun and Choke Combo, 1.8-61 MHz, 1.5/3/5KW PEP Options, Loop Antennas CB-4-1500OCF

1500 Watt PEP rated 4:1 Current Balun + internal 1:1 Current Balun in one enclosure

After many requests we have created a compact, special balun for OCF and loop (Skyloop or Delta loop) antennas without vertical radiators. 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). Rated for full 1500 watts PEP and 450 watts CW (ICAS). 1.8Mhz – 61 MHz.

Housed in a 4” x 4” x 2” waterproof housing with SO-239 input and stainless steel eye bolts on the side for ease of connection to your wire antenna. Top eye bolt acts as an antenna hoist. Use this balun combination when you DO NOT have a vertical radiator.

3KW and 5KW are in 6" x 6" x 4" enclosure. 1.5KW is 3 pounds, 3KW is 4 pounds, 5KW is 5 pounds.

We recommend a 29%/71% offset for best all band results. If you use 66%/34% offset, do not use on 15 meters as the impedance mismatch will damage the balun.

$99.95 In stock
UPC:Does not apply
Brand:Palomar Engineers
MPN:CB-4-1500OCF, CB-4-3000OCF, CB-4-5000OCF
Frequency Band(s):160-6 meters for 1.5KW size, 160-10 meters for 3KW, 5KW
Country/Region of Manufacture:USA
Input ohms/Output ohms:50 in/200 out
Frequency Range (MHz):1.8-61 MHz for 1.5KW, 1.8-31 MHz for 3KW/5KW
PEP Power Rating (watts):1.5KW/3KW/5KW
Weight (pounds):3(1.4KW)/4(3KW)/5(5KW)
Enclosure Size:4"x4"x 2"(1.5KW), 6"x 6" x 4"(3KW/5KW)
PEP Power Rating Select 1.5KW PEP Watts (0) 3 KW PEP Watts (35) 5KW PEP watts (75)
Off Center Fed (OCF) 4:1 Balun and Choke Combo, 1.8-61 MHz, 1.5/3/5KW PEP Options, Loop Antennas
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