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![HF Impedance Transformer Kits 4027835776 - HF Impedance Transformer Kits](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/4027835776.png?ssl=1)
20-6 Meter Loop Antenna System with 4:1 Balun and Choke Combo, (20, 17, 15, 12, 11, 10, 6 meters) 500/1.5KW/5KW PEP Options
20-6 Meter Loop Antenna System with 4:1 Balun and Choke Combo, (20, 17, 15, 12, 11, 10, 6 meters) 500/1.5KW/5KW PEP Options
SKU PAL-LOOP2006-XXX
List price
$189.95
Save 21%
$149.95
On Sale
![HF Impedance Transformer Kits 3184471292 - HF Impedance Transformer Kits](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/3184471292.jpg?ssl=1)
40-6 Meter Loop Antenna System with 4:1 Balun and Choke Combo, (40, 20, 17, 15, 12, 11, 10, 6 meters) 500/1.5KW/5KW PEP Options
40-6 Meter Loop Antenna System with 4:1 Balun and Choke Combo, (40, 20, 17, 15, 12, 11, 10, 6 meters) 500/1.5KW/5KW PEP Options
SKU PAL-LOOP4010
List price
$189.95
Save 11%
$169.95
On Sale
![HF Impedance Transformer Kits 993486357 - HF Impedance Transformer Kits](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/993486357.jpg?ssl=1)
50:100 (2:1) CUBE™ Balun/Unun 1.8-61 MHz, 2KW/5KW, Loop Antennas
50:100 (2:1) CUBE™ Balun/Unun 1.8-61 MHz, 2KW/5KW, Loop Antennas
SKU CB-2-2000
List price
$159.95
Save 25%
$119.95
On Sale
![HF Impedance Transformer Kits 1864891770 - HF Impedance Transformer Kits](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/1864891770.jpg?ssl=1)
50:450 ohm (9:1) CUBE™ Unun, 1.8-61 MHz, 1.5 KW, End Fed Long Wire
50:450 ohm (9:1) CUBE™ Unun, 1.8-61 MHz, 1.5 KW, End Fed Long Wire
SKU CU-9-1500
List price
$129.95
Save 15%
$109.95
On Sale
![HF Impedance Transformer Kits 3862217729 - HF Impedance Transformer Kits](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/3862217729.jpg?ssl=1)
Coax Common Mode Noise Filter - 500 Watts PEP, 1-60 MHz, -38dB Common Mode Noise Suppression!
Coax Common Mode Noise Filter - 500 Watts PEP, 1-60 MHz, -38dB Common Mode Noise Suppression!
SKU CMNF-500-50
List price
$79.95
Save 13%
$69.95
On Sale
![HF Impedance Transformer Kits 3406525134 - HF Impedance Transformer Kits](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/3406525134.jpg?ssl=1)
CUBE Feed Line Choke/Line Isolator Unun, 1.5KW, 1.8-65 MHz, -38dB Suppression
CUBE Feed Line Choke/Line Isolator Unun, 1.5KW, 1.8-65 MHz, -38dB Suppression
SKU CU-1-1500SO
List price
$149.95
Save 27%
$109.95
![HF Impedance Transformer Kits 3061086793 - HF Impedance Transformer Kits](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/3061086793.jpg?ssl=1)
DELUXE Desktop Computer with AC power RFI Kit - 11 Filters
DELUXE Desktop Computer with AC power RFI Kit - 11 Filters
SKU RFI-DESKTOP-DELUXE
$69.95
On Sale
![HF Impedance Transformer Kits 2520706681 - HF Impedance Transformer Kits](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/2520706681.jpg?ssl=1)
Ferrite Mini Snap On Combo Pack, Mix 31, RFI Range 1-300 MHz - 10 filters (3/8, 1/2, 3/4)
Ferrite Mini Snap On Combo Pack, Mix 31, RFI Range 1-300 MHz - 10 filters (3/8, 1/2, 3/4)
SKU FMSCP-31-10
List price
$55.95
Save 11%
$49.95
On Sale
![HF Impedance Transformer Kits 1487159529 - HF Impedance Transformer Kits](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/1487159529.jpg?ssl=1)
Ferrite Ring and Snap On Combo Pack - 10 Rings (1.4" ID) + 10 Snap On Beads (1/2" ID) - Mix 31 (RFI Range 1-300 MHz) FREE USA SHIPPING
Ferrite Ring and Snap On Combo Pack - 10 Rings (1.4" ID) + 10 Snap On Beads (1/2" ID) - Mix 31 (RFI Range 1-300 MHz) FREE USA SHIPPING
SKU FRSCP-31-20
List price
$155.00
Save 10%
$139.95
On Sale
![HF Impedance Transformer Kits 2385165615 - HF Impedance Transformer Kits](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/2385165615.jpg?ssl=1)
Ferrite Ring Combo Pack, FT240 - 1.4" ID, 10 Rings - Mix 31(4), 61(3), 75(3), RFI Range .15-2000 MHz
Ferrite Ring Combo Pack, FT240 - 1.4" ID, 10 Rings - Mix 31(4), 61(3), 75(3), RFI Range .15-2000 MHz
SKU FRCP-240-10
List price
$139.50
Save 14%
$119.95
On Sale
![HF Impedance Transformer Kits 2520706712 - HF Impedance Transformer Kits](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/2520706712.jpg?ssl=1)
Ferrite Snap On Combo Pack, Mix 31, RFI Range 1-300 MHz - 1/4, 3/8, 1/2, 3/4 - 22 filters
Ferrite Snap On Combo Pack, Mix 31, RFI Range 1-300 MHz - 1/4, 3/8, 1/2, 3/4 - 22 filters
SKU FSCP-31-22
List price
$108.00
Save 12%
$95.00
On Sale
![HF Impedance Transformer Kits 672806530 - HF Impedance Transformer Kits](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/672806530.jpg?ssl=1)
Ferrite Snap on/Ring Combo Pack, Mix 31, RFI Range 1-300 MHz - 16 filters
Ferrite Snap on/Ring Combo Pack, Mix 31, RFI Range 1-300 MHz - 16 filters
SKU FSRCP-31-16
List price
$112.00
Save 15%
$95.00
On Sale
![HF Impedance Transformer Kits 977476519 - HF Impedance Transformer Kits](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/977476519.jpg?ssl=1)
FT240-3I, ID=1.4", AC/DC/Coax Noise Filter, RFI Range 1-300 MHz, Bulk Pack of 10
FT240-3I, ID=1.4", AC/DC/Coax Noise Filter, RFI Range 1-300 MHz, Bulk Pack of 10
SKU F240-31-10
List price
$100.00
Save 10%
$89.95
On Sale
![HF Impedance Transformer Kits 977476519 - HF Impedance Transformer Kits](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/977476519.jpg?ssl=1)
FT240-3I, ID=1.4", AC/DC/Coax Noise Filter, RFI Range 1-300 MHz, Mini Pack of 3
FT240-3I, ID=1.4", AC/DC/Coax Noise Filter, RFI Range 1-300 MHz, Mini Pack of 3
SKU F240-31-3
List price
$34.95
Save 14%
$29.95
On Sale
![HF Impedance Transformer Kits 2833412803 - HF Impedance Transformer Kits](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/2833412803.jpg?ssl=1)
Garage Door Opener RFI Kit, Low Freq (150 KHz-10 MHz) for AM Broadcast or High Freq (1-300 MHz) for Ham Radio or Commercial RFI
Garage Door Opener RFI Kit, Low Freq (150 KHz-10 MHz) for AM Broadcast or High Freq (1-300 MHz) for Ham Radio or Commercial RFI
SKU RFI-GDO
List price
$49.95
Save 30%
$34.95
On Sale
![HF Impedance Transformer Kits 982808127 - HF Impedance Transformer Kits](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/982808127.jpg?ssl=1)
Home Theater System RFI Kit for up to 4 HDTV, A/V units + I/O cables - 12 filters
Home Theater System RFI Kit for up to 4 HDTV, A/V units + I/O cables - 12 filters
SKU RFI-HTS
List price
$89.95
Save 22%
$69.95
On Sale
![HF Impedance Transformer Kits 1725432406 - HF Impedance Transformer Kits](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/1725432406.jpg?ssl=1)
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-4-1-1500
List price
$189.95
Save 26%
$139.95
On Sale
![HF Impedance Transformer Kits 1725513115 - HF Impedance Transformer Kits](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/1725513115.jpg?ssl=1)
Hybrid 6:1 Current Balun + 1:1 Current Balun in one enclosure, 1.8-61 MHz, 1.5KW/5KW PEP
Hybrid 6:1 Current Balun + 1:1 Current Balun in one enclosure, 1.8-61 MHz, 1.5KW/5KW PEP
SKU CB-6-1-1500
List price
$189.95
Save 21%
$149.95
On Sale
![HF Impedance Transformer Kits 581498708 - HF Impedance Transformer Kits](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/581498708.jpg?ssl=1)
Kurt Speaks Out - Digital PDF Version - Download Now!
Kurt Speaks Out - Digital PDF Version - Download Now!
SKU KURT-KSO-PDF
List price
$14.95
Save 100%
$0.00
On Sale
![HF Impedance Transformer Kits 581468958 - HF Impedance Transformer Kits](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/581468958.jpg?ssl=1)
Laptop Computer with DC power RFI Kit - 7 Filters
Laptop Computer with DC power RFI Kit - 7 Filters
SKU RFI-Laptop
List price
$34.95
Save 14%
$29.95
![HF Impedance Transformer Kits 4222605656 - HF Impedance Transformer Kits](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/4222605656.png?ssl=1)
MINI-BALUN 1:1 Coax Interface to Ladder Line, Dipole elements, 500 Watts PEP, up to -38Db Common Mode Rejection, 1-61 MHz, Flagpole, Dipole, Beam and G5RV/ZS6BKW Antennas
MINI-BALUN 1:1 Coax Interface to Ladder Line, Dipole elements, 500 Watts PEP, up to -38Db Common Mode Rejection, 1-61 MHz, Flagpole, Dipole, Beam and G5RV/ZS6BKW Antennas
SKU MB-1-500SS
$69.95
On Sale
![HF Impedance Transformer Kits 930357572 - HF Impedance Transformer Kits](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/930357572.jpg?ssl=1)
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
![HF Impedance Transformer Kits 3882535254 - HF Impedance Transformer Kits](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/3882535254.png?ssl=1)
Multi Ratio 50:200 (4:1) & 50:450 (9:1) CUBE™ Unun, 1.8-60 MHz, 1500W, End Fed
Multi Ratio 50:200 (4:1) & 50:450 (9:1) CUBE™ Unun, 1.8-60 MHz, 1500W, End Fed
SKU CU-4-9-1500
List price
$169.95
Save 24%
$129.95
On Sale
![HF Impedance Transformer Kits 749899728 - HF Impedance Transformer Kits](https://i0.wp.com/d2j6dbq0eux0bg.cloudfront.net/images/10325621/749899728.jpg?ssl=1)
Multi-Ring/Multi-Snap On Combo Pack, Mix 31, RFI Range 1-300 MHz - 17 filters
Multi-Ring/Multi-Snap On Combo Pack, Mix 31, RFI Range 1-300 MHz - 17 filters
SKU MRSCP-31-17
List price
$112.00
Save 15%
$95.00
These impedance transformer kits have been designed for the Do-It-Yourself (DIY) enthusiast and Instructor workshops on baluns and ununs for antenna matching and RFI use.
The impedance transformers are classified in ratios of 2:1 (100:50 ohm) to 16:1 (800:50 ohm). The outputs can be configured as balanced (Balun) or as unbalanced (unun) with respect to the inputs which are considered all unbalanced coax at 50 ohms. All impedance transformers are designed for 1.8-31 MHz unless otherwise specified.