Computer RFI Kits

50:200 ohm (4:1) Transformers

Store/Antenna Products/CUBE Impedance Transformers (<1:1, 1:1, >1:1)/50:200 ohm (4:1) Transformers
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2675770684 - Computer RFI Kits
50:200 (4:1) CUBE™ Balun, 1.8-61 MHz, 5KW (choose top stud/eyebolt output) - FREE USA SHIPPING
50:200 (4:1) CUBE™ Balun, 1.8-61 MHz, 5KW (choose top stud/eyebolt output) - FREE USA SHIPPING
SKU CB-4-5000TS
$149.95
3182280067 - Computer RFI Kits
50:200 (4:1) CUBE™ Current Balun, 1.8-61 MHz, 1.5KW - Loop, OCF, Folded Dipole useful to 200 MHz
50:200 (4:1) CUBE™ Current Balun, 1.8-61 MHz, 1.5KW - Loop, OCF, Folded Dipole useful to 200 MHz
SKU CB-4-1500EB
$124.95
1101114671 - Computer RFI Kits
50:200 (4:1) CUBE™ Unun, 1.8-61 MHz, 1500/5000 Watts PEP, End Fed, Vertical, Monopole
50:200 (4:1) CUBE™ Unun, 1.8-61 MHz, 1500/5000 Watts PEP, End Fed, Vertical, Monopole
SKU CU-4-1500
$119.95
2561718865 - Computer RFI Kits
50:200 (4:1) CUBE™ Voltage Balun, 1.8-61 MHz, 1.5KW - Carolina Windom, OCF, Loop Antennas
50:200 (4:1) CUBE™ Voltage Balun, 1.8-61 MHz, 1.5KW - Carolina Windom, OCF, Loop Antennas
SKU CB-4-1500EBV
$124.95
2990313247 - Computer RFI Kits
50:200 ohm (4:1) Dual Core Current Balun Kit, 1-55 MHz, 1500 watts PEP, for OCF, Loop, Ladder Line Antennas
50:200 ohm (4:1) Dual Core Current Balun Kit, 1-55 MHz, 1500 watts PEP, for OCF, Loop, Ladder Line Antennas
Ladderline to Coax Transformer
SKU BA-4-1500DC
$37.95
982795650 - Computer RFI Kits
50:200 ohm (4:1) HF Balun or Unun Core Kit, 3-31 MHz, 250 watts
50:200 ohm (4:1) HF Balun or Unun Core Kit, 3-31 MHz, 250 watts
SKU BA-4-250
$19.95
4599243816 - Computer RFI Kits
Bullet 50:200 (4:1) HF Balun, 1.8-61 MHz, 500/1500 Watts PEP, Loop, OCF, ZEPP
Bullet 50:200 (4:1) HF Balun, 1.8-61 MHz, 500/1500 Watts PEP, Loop, OCF, ZEPP
SKU Bullet-4B-500EB
$89.95
3854321637 - Computer RFI Kits
Bullet 50:200 (4:1) HF Unun, 1.8-61 MHz, 100/500/1500 Watts, End Fed OCF Antennas
Bullet 50:200 (4:1) HF Unun, 1.8-61 MHz, 100/500/1500 Watts, End Fed OCF Antennas
SKU Bullet-4U-100
$69.95
4599290833 - Computer RFI Kits
Bullet Hybrid (4:1) HF Balun + 1:1 Choke, 1.8-61 MHz, 500/1500 Watts, OCF, Loop, Folded Dipole Antennas
Bullet Hybrid (4:1) HF Balun + 1:1 Choke, 1.8-61 MHz, 500/1500 Watts, OCF, Loop, Folded Dipole Antennas
SKU BULLET-4-1-500EB
$119.95
On Sale
1725432616 - Computer RFI Kits
Hybrid 4:1 Balun + 1:1 Current Balun in one enclosure, 1.8-61 MHz, 1.5/5KW PEP - Loop, OCF Antennas
Hybrid 4:1 Balun + 1:1 Current Balun in one enclosure, 1.8-61 MHz, 1.5/5KW PEP - Loop, OCF Antennas
SKU CB-4-1-1500EB
List price $189.95
Save 21%
$149.95
4405471819 - Computer RFI Kits
MINI-BALUN 4:1 Coax Interface to Ladder Line, Loop, OCF antennas 500 Watts PEP, 1-61 MHz
MINI-BALUN 4:1 Coax Interface to Ladder Line, Loop, OCF antennas 500 Watts PEP, 1-61 MHz
SKU MB-4-500SS
$69.95
4016551822 - Computer RFI Kits
MINI-BALUN 9:1, Top Studs output, 500 Watts PEP, 1-61 MHz
MINI-BALUN 9:1, Top Studs output, 500 Watts PEP, 1-61 MHz
SKU MB-9-500TS
$59.95
On Sale
930357589 - Computer RFI Kits
Multi Ratio 4:1/6:1/9:1 CUBE™ Balun, 1.8-61 MHz, 1.5 KW
Multi Ratio 4:1/6:1/9:1 CUBE™ Balun, 1.8-61 MHz, 1.5 KW
SKU CB-4-9-1500
List price $149.95
Save 13%
$129.95
On Sale
3882535253 - Computer RFI Kits
Multi Ratio 50:200 (4:1) & 50:450 (9:1) CUBE™ Unun, 1.8-60 MHz, 1500W PEP, End Fed Antennas
Multi Ratio 50:200 (4:1) & 50:450 (9:1) CUBE™ Unun, 1.8-60 MHz, 1500W PEP, End Fed Antennas
SKU CU-4-9-1500
List price $169.95
Save 24%
$129.95
1653144024 - Computer RFI Kits
Off Center Fed (OCF) 4:1 Balun and 1:1 Balun Combo, 1.8-61 MHz, 1.5/5KW PEP Option
Off Center Fed (OCF) 4:1 Balun and 1:1 Balun Combo, 1.8-61 MHz, 1.5/5KW PEP Option
SKU CB-4-1500OCF
$139.95
Display prices in:USD
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