Computer RFI Kits

50:112 (2.25:1) CUBE™ Balun 3-30 MHz, 1.5KW/3KW/5KW

SKU CB-2.25-1500TS
$109.95
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List price $159.95
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Output Connector
Power rating (PEP)
Input Connector
1
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50:112 (2.25:1) CUBE™ Balun 3-30 MHz, 1.5KW/3KW/5KW
Product Details
Country/Region of Manufacture: USA
Type: BALUN
Input ohms/Output ohms: 50
Frequency Range < 2:1 SWR (MHz): 3-30
PEP Power Rating (watts): 1500/3000/5000
Enclosure Size: 4" x 4" x 2" (1.5KW), 4" x 4" x 4" (3KW/5KW)
Weight (pounds): 3
Antenna Compatability: loops, quads, 112 ohm input antennas

High Power rated at 1.5KW/3KW/5KW (option) PEP (FT8 mode at 1.5KW)

Broad frequency range of 3-30 MHz for < 2:1 SWR into matched load

Compact 4" x 4" x 2" (1.5KW) or 4" x 4" x 4" (3KW/5KW) light weight weatherproof enclosure

Quick, easy deployment with either halyard hoist and side eyebolts or to stud outputs (all 1/4" stainless hardware)

Choice of BALUN (balanced outputs) or UNUN (unbalanced output and ground)

Model CB-2.25-1500, 3000, 5000 is a 2.25:1 (112:50 ohm) multi-core balun used to translate a 50 ohm input to 112 ohms at RF power levels up to 5000 watts PEP when used with a matched load such as single band delta loop, quad or loop skywire. This assembled balun features a multi-core configuration for increased power handling and flatter frequency response to over 30 MHz. With a matched 112 ohm load the SWR over the frequency range is very consistent from 3-30 MHz and SWR is less than 2:1 over the range allowing easy tuning by most radio internal antenna tuners or an external tuner.

These RFI kits are specifically selected to cure most household computer device RFI problems. It contains ferrite toroids for AC or DC power supply protection and Snap On ferrite spli beads selected to eliminate RFI from 1 to 1000 Mhz. The beads are easy to use, don’t require modification of the protected equipment and work in almost all cases, even when plug-in filters fail. 

 

 

Typical Installations

 

20131210 115137 150x150 - Computer RFI Kits

Ethernet Cable on F-240 Toroid – 7 turns

20131210 114800 150x150 - Computer RFI Kits

Ethernet Cable on FSB-1/2 – 3 turns for 9X Impedance

20131210 1148191 150x150 - Computer RFI Kits

Ethernet Cable on FSB-1/4

20131210 114716 150x150 - Computer RFI Kits

AC Cable on F-240 Toroid – 6 turns

20131210 114844 150x150 - Computer RFI Kits

DSL Modem DC Power Supply on F114-43 Toroid – 5 Turns