HF Impedance Transformer Kits

Balun/Unun DIY Kits

Store/Antenna Products/CUBE Impedance Transformers (<1:1, 1:1, >1:1)/Balun/Unun DIY Kits
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2990313247 - HF Impedance Transformer 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 - HF Impedance Transformer 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
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
581498192 - HF Impedance Transformer Kits
50:50 ohm (1:1) Common Mode Choke HF Balun Kit - 1500 watt PEP, 1.8-31 MHz
50:50 ohm (1:1) Common Mode Choke HF Balun Kit - 1500 watt PEP, 1.8-31 MHz
SKU BA-1-1500
$29.97
581480972 - HF Impedance Transformer Kits
Enclosure Box - 4" x 4" x 4"
Enclosure Box - 4" x 4" x 4"
SKU CB-Box-2
$19.95
890710981 - HF Impedance Transformer Kits
Enclosure Box - 4.375" x 4.375" x 2.375"
Enclosure Box - 4.375" x 4.375" x 2.375"
SKU CB-Box-1
$14.95
581480969 - HF Impedance Transformer Kits
Enclosure Box - 6" x 6" x 4"
Enclosure Box - 6" x 6" x 4"
SKU CB-Box-3
$27.95
On Sale
2329254354 - HF Impedance Transformer Kits
FT140-43, ID=.9", OD=1.4", RFI Range 25-300 MHz
FT140-43, ID=.9", OD=1.4", RFI Range 25-300 MHz
SKU F140-43
List price $4.50
Save 14%
$3.89
3215425210 - HF Impedance Transformer Kits
Halyard Hoist Eyebolt Kit - 1/4-20 Stainless Steel
Halyard Hoist Eyebolt Kit - 1/4-20 Stainless Steel
SKU TEK-1/4-1
$4.95
982895404 - HF Impedance Transformer Kits
N Connector Kit (female chassis connector)
N Connector Kit (female chassis connector)
SKU UG-58-1
$7.49
3498473398 - HF Impedance Transformer Kits
Preassembled Balun & Unun Boxes, Stainless Hardware - just add your ferrite choke or transformer
Preassembled Balun & Unun Boxes, Stainless Hardware - just add your ferrite choke or transformer
SKU CU-BOX-1-SO
$49.95
581480975 - HF Impedance Transformer Kits
SO-239 Kit (female chassis connector + hardware)
SO-239 Kit (female chassis connector + hardware)
SKU SO-239 Kit-1/2
$3.95
3215425215 - HF Impedance Transformer Kits
Side Eyebolt Kit - 1/4-20 Stainless Steel
Side Eyebolt Kit - 1/4-20 Stainless Steel
SKU SEK-1/4-1
$5.95
3214887724 - HF Impedance Transformer Kits
Side or Top Stud Kit - 1/4-20 Stainless Steel
Side or Top Stud Kit - 1/4-20 Stainless Steel
SKU SSK-1/4-1
$3.95
808654873 - HF Impedance Transformer Kits
UHF PL-259 Male Plug to SO-239 Female Right Angle 90 Degree RF Adapter Connector
UHF PL-259 Male Plug to SO-239 Female Right Angle 90 Degree RF Adapter Connector
SKU UHF-90
$6.95
Display prices in:USD
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.