HF Impedance Transformer Kits

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On Sale
3142106666 - HF Impedance Transformer Kits
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-LOOP2006-500
List price $189.95
Save 21%
$149.95
On Sale
3142106666 - HF Impedance Transformer Kits
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-LOOP4010-500
List price $189.95
Save 11%
$169.95
On Sale
993486356 - HF Impedance Transformer Kits
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-2-2000EB
List price $159.95
Save 25%
$119.95
On Sale
3230302722 - HF Impedance Transformer Kits
50:112 (2.25:1) CUBE™ Balun 3-30 MHz, 1.5KW/3KW/5KW
50:112 (2.25:1) CUBE™ Balun 3-30 MHz, 1.5KW/3KW/5KW
SKU CB-2.25-1500TS
List price $159.95
Save 31%
$109.95
1072922502 - HF Impedance Transformer Kits
50:450 ohm (9:1) Balun or Unun Core Kit, .5-32 MHz, 1000 watts PEP, end fed/Ladder Line, T2FD antenna
50:450 ohm (9:1) Balun or Unun Core Kit, .5-32 MHz, 1000 watts PEP, end fed/Ladder Line, T2FD antenna
SKU BA-9-1000
$29.95
581480949 - HF Impedance Transformer Kits
50:450 ohm (9:1) Balun or Unun Core Kit, 1.8-30 MHz, 250 watts PEP, end fed, T2FD antenna
50:450 ohm (9:1) Balun or Unun Core Kit, 1.8-30 MHz, 250 watts PEP, end fed, T2FD antenna
SKU BA-9-250
$21.95
On Sale
1864891769 - HF Impedance Transformer Kits
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
3142255724 - HF Impedance Transformer Kits
80-10 Meter Loop Antenna System with 4:1 Balun and Choke Combo, 3-30 MHz, 500/1500/5000 PEP Option
80-10 Meter Loop Antenna System with 4:1 Balun and Choke Combo, 3-30 MHz, 500/1500/5000 PEP Option
SKU PAL-LOOP8010-500
$199.95
982808146 - HF Impedance Transformer Kits
AC Cable Noise Filter for Large Plugs - 3" ID
AC Cable Noise Filter for Large Plugs - 3" ID
SKU ACCF-3
$39.95
2654217921 - HF Impedance Transformer Kits
AC Cable Noise Filter for Standard 120VAC Plugs - 1.4" ID
AC Cable Noise Filter for Standard 120VAC Plugs - 1.4" ID
SKU ACCF-1.4
$12.95
3854321637 - HF Impedance Transformer 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
3938117916 - HF Impedance Transformer Kits
Bullet 50:450 (9:1) HF Unun, 1.8-61 MHz, 100 Watts, End Fed Long Wire Antennas
Bullet 50:450 (9:1) HF Unun, 1.8-61 MHz, 100 Watts, End Fed Long Wire Antennas
SKU Bullet-9U-100
$59.95
4488332622 - HF Impedance Transformer Kits
Bullet 50:450 (9:1) HF Unun, 1.8-61 MHz, 500/1500 Watts, End Fed Long Wire Antennas
Bullet 50:450 (9:1) HF Unun, 1.8-61 MHz, 500/1500 Watts, End Fed Long Wire Antennas
SKU Bullet-9U-500
$79.95
On Sale
4530268690 - HF Impedance Transformer Kits
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
On Sale
4502924397 - HF Impedance Transformer Kits
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
816294797 - HF Impedance Transformer Kits
Coax Common Mode Noise Filter - 5000 Watts, 1.8-60 MHz, up to -38dB Noise Suppression
Coax Common Mode Noise Filter - 5000 Watts, 1.8-60 MHz, up to -38dB Noise Suppression
SKU CMNF-5000HF
$129.95
581480816 - HF Impedance Transformer Kits
Coax Static Bleeder
Coax Static Bleeder
SKU SB-1
$21.95
2654143998 - HF Impedance Transformer Kits
DC Cable Noise Filter for 2 Gauge and Smaller Wire - 1.4" ID
DC Cable Noise Filter for 2 Gauge and Smaller Wire - 1.4" ID
SKU DCCF-1.4
$12.95
3061086792 - HF Impedance Transformer Kits
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
1346529454 - HF Impedance Transformer Kits
Elecraft K3/K3S Transceiver RFI Kit - 7 Noise Reduction Filters
Elecraft K3/K3S Transceiver RFI Kit - 7 Noise Reduction Filters
SKU RFI-ELECRAFT-K3
$49.95
2427589480 - HF Impedance Transformer Kits
Elecraft KX3 Transceiver RFI Kit - 3 Noise Reduction Filters
Elecraft KX3 Transceiver RFI Kit - 3 Noise Reduction Filters
SKU RFI-ELECRAFT-KX3
$19.95
FREE USA SHIPPING
1747185465 - HF Impedance Transformer Kits
Extra Large Ring/Multi-Snap On Combo Pack, Mix 31, RFI Range 1-300 MHz - 28 filters (1/4", 1/2", 1.4")
Extra Large Ring/Multi-Snap On Combo Pack, Mix 31, RFI Range 1-300 MHz - 28 filters (1/4", 1/2", 1.4")
SKU XLRSCP-31-28
List price $147.50
Save 12%
$129.95
977476513 - HF Impedance Transformer Kits
F240-31, ID=1.4", AC/DC/Coax Noise Filter, RFI Range 1-300 MHz, AKA FT240-31
F240-31, ID=1.4", AC/DC/Coax Noise Filter, RFI Range 1-300 MHz, AKA FT240-31
SKU F240-31-1
$9.99
On Sale
977476518 - HF Impedance Transformer Kits
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
977476518 - HF Impedance Transformer Kits
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
977476498 - HF Impedance Transformer Kits
FT400-3I, ID=3", RFI Range 1-300 MHz
FT400-3I, ID=3", RFI Range 1-300 MHz
SKU F400-31-1
$39.95
On Sale
2520706680 - HF Impedance Transformer Kits
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
2385165614 - HF Impedance Transformer Kits
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
2385087467 - HF Impedance Transformer Kits
Ferrite Ring Mini Combo Pack, FT240 - 1.4" ID, 3 Rings - Mix 31, 61, 75, RFI Range .15-2000 MHz
Ferrite Ring Mini Combo Pack, FT240 - 1.4" ID, 3 Rings - Mix 31, 61, 75, RFI Range .15-2000 MHz
SKU FRCP-240-3
$39.50
On Sale
1487159528 - HF Impedance Transformer Kits
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
2520706711 - HF Impedance Transformer Kits
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
1706155547 - HF Impedance Transformer Kits
Ferrite Snap On Sampler Pack, Mix 31, RFI Range 1-300 MHz - 10 filters (1/4, 1/2, 3/4, 1)
Ferrite Snap On Sampler Pack, Mix 31, RFI Range 1-300 MHz - 10 filters (1/4, 1/2, 3/4, 1)
SKU FSOSP-31-10
$59.95
On Sale
672806532 - HF Impedance Transformer Kits
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
2833412802 - HF Impedance Transformer Kits
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
982840464 - HF Impedance Transformer Kits
HF Base Deluxe Transceiver RFI and Noise Reduction Kit - 14 Filters
HF Base Deluxe Transceiver RFI and Noise Reduction Kit - 14 Filters
SKU RFI-XCVR-DELUXE
$89.95
982808117 - HF Impedance Transformer Kits
HF Linear Amplifier RFI Kit - Alpha, Ameritron, HeathKit, Henry, Icom, Kenwood, Yaesu, Generic Amps - 4 Filters
HF Linear Amplifier RFI Kit - Alpha, Ameritron, HeathKit, Henry, Icom, Kenwood, Yaesu, Generic Amps - 4 Filters
SKU RFI-LA-AM
$54.95
4029027008 - HF Impedance Transformer Kits
HF Mobile Transceiver RFI and Noise Reduction Kit, RFI Range 1-300 Mz
HF Mobile Transceiver RFI and Noise Reduction Kit, RFI Range 1-300 Mz
SKU RFi-HF-MOBILE
$39.95
BEST SELLER!
1332224053 - HF Impedance Transformer Kits
HF Transceiver RFI/Noise Reduction Kit - 5 Noise Reduction Filters + Coax Noise Filter
HF Transceiver RFI/Noise Reduction Kit - 5 Noise Reduction Filters + Coax Noise Filter
SKU RFI-XCVR-STD+NF
$99.95
982808125 - HF Impedance Transformer Kits
HF Transceiver RFI/Noise Reduction Kit, RFI Range 1-300 MHz, 5 Filters
HF Transceiver RFI/Noise Reduction Kit, RFI Range 1-300 MHz, 5 Filters
SKU RFI-XCVR-STD
$39.95
On Sale
982808129 - HF Impedance Transformer Kits
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
1725432616 - HF Impedance Transformer 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 26%
$139.95
On Sale
1725513114 - HF Impedance Transformer Kits
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
1725513180 - HF Impedance Transformer Kits
Hybrid 9:1 Current Balun + 1:1 Current Balun in one enclosure, 1.8-61 MHz, 1.5KW PEP - BBTD, T2FD Antenna
Hybrid 9:1 Current Balun + 1:1 Current Balun in one enclosure, 1.8-61 MHz, 1.5KW PEP - BBTD, T2FD Antenna
SKU CB-9-1-1500
List price $189.95
Save 26%
$139.95
581498646 - HF Impedance Transformer Kits
Icom 703/705/706/718/7000/7100 Transceiver RFI Kit - 5 Noise Reduction Filters
Icom 703/705/706/718/7000/7100 Transceiver RFI Kit - 5 Noise Reduction Filters
SKU RFI-Icom-7000
$39.95
1438278740 - HF Impedance Transformer Kits
Icom 718 Transceiver RFI Kit - 5 Noise Reduction Filters
Icom 718 Transceiver RFI Kit - 5 Noise Reduction Filters
SKU RFI-ICOM-718
$39.95
581498646 - HF Impedance Transformer Kits
Icom 7400/7410/7600/7610/7700 Transceiver RFI and Noise Reduction Kit, RFI Range 1-60 MHz, 14 Filters
Icom 7400/7410/7600/7610/7700 Transceiver RFI and Noise Reduction Kit, RFI Range 1-60 MHz, 14 Filters
SKU RFI-ICOM-7610
$89.95
581498646 - HF Impedance Transformer Kits
Icom 746/756/765/775/781 Transceiver RFI and Noise Reduction Kit, RFI Range 1-300 MHz, 14 Filters
Icom 746/756/765/775/781 Transceiver RFI and Noise Reduction Kit, RFI Range 1-300 MHz, 14 Filters
SKU RFI-Icom-756
$89.95
BEST SELLER!
1332224053 - HF Impedance Transformer Kits
Icom IC-7300 Transceiver Deluxe RFI Kit - 5 Noise Reduction Filters + Coax Noise Filter
Icom IC-7300 Transceiver Deluxe RFI Kit - 5 Noise Reduction Filters + Coax Noise Filter
SKU RFI-ICOM-7300DLX
$99.95
BEST SELLER!
1438288361 - HF Impedance Transformer Kits
Icom IC-7300 Transceiver RFI Kit - 5 Noise Reduction Filters
Icom IC-7300 Transceiver RFI Kit - 5 Noise Reduction Filters
SKU RFI-ICOM-7300
$39.95
1567997402 - HF Impedance Transformer Kits
Icom IC-9700 Transceiver RFI Kit - 12 Noise Reduction Filters
Icom IC-9700 Transceiver RFI Kit - 12 Noise Reduction Filters
SKU RFI-ICOM-9700
$79.95
1812760021 - HF Impedance Transformer Kits
Kenwood TS-890 Transceiver RFI and Noise Reduction Kit, RFI Range 1-300 MHz, 14 Filters
Kenwood TS-890 Transceiver RFI and Noise Reduction Kit, RFI Range 1-300 MHz, 14 Filters
SKU RFI-KENWOOD-890
$89.95
2654184349 - HF Impedance Transformer Kits
Kenwood TS520/ 530/820/830, Transceiver RFI Kit - 5 Noise Reduction Filters
Kenwood TS520/ 530/820/830, Transceiver RFI Kit - 5 Noise Reduction Filters
SKU RFI-KENWOOD-830
$39.95
1309885500 - HF Impedance Transformer Kits
Kenwood TS570, 590, 2000 Transceiver RFI Kit - 14 Noise Reduction Filters
Kenwood TS570, 590, 2000 Transceiver RFI Kit - 14 Noise Reduction Filters
SKU RFI-Kenwood-590
$89.95
On Sale
581498710 - HF Impedance Transformer Kits
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
581468960 - HF Impedance Transformer Kits
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
4029797252 - HF Impedance Transformer Kits
MAXI-CHOKER Coax Line Isolator/Choke, 1-61 MHz, 1.5/3KW/5KW, up to -60 Db Common Mode Rejection, Static Bleeder Option
MAXI-CHOKER Coax Line Isolator/Choke, 1-61 MHz, 1.5/3KW/5KW, up to -60 Db Common Mode Rejection, Static Bleeder Option
SKU MC-1-1500
$89.95
4222605655 - HF Impedance Transformer Kits
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
1112255372 - HF Impedance Transformer Kits
MINI-CHOKER Coax Line Isolator, 500 Watts PEP, up to -38Db Common Mode Rejection, 1-61 MHz, 1:1 Unun
MINI-CHOKER Coax Line Isolator, 500 Watts PEP, up to -38Db Common Mode Rejection, 1-61 MHz, 1:1 Unun
SKU MC-1-500-50
$69.95
3548913921 - HF Impedance Transformer Kits
Maxi-Choker, 1:1 Line Isolator 3KW, 7-54 MHz Optimized for Wide Band Log Periodic, HF & 6M Beams. Noise Suppression up to 38 dB
Maxi-Choker, 1:1 Line Isolator 3KW, 7-54 MHz Optimized for Wide Band Log Periodic, HF & 6M Beams. Noise Suppression up to 38 dB
SKU MC-1-3000LP
$109.95
On Sale
930357589 - HF Impedance Transformer 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
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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.