HF High Power Impedance Transformers

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CUBE & Bullet Baluns/Ununs (1:1)

Store/Antenna Products/Coax Feed Line Common Mode Chokes/CUBE & Bullet Baluns/Ununs (1:1)

Current Unun and Balun Enclosure – CUBE Chokes™ are available with balanced output (eyebolts, top or side studs - in which case they are called "baluns") or with unbalanced output (top stud and ground - in which case they are called "ununs"). We also make 1:1 Baluns in the "BULLET" round tube format which offers 100, 500, 1500 and 5000 watts sizes.

In all cases they have a 50 ohm input and a 50 ohm output and act as feed line chokes which suppress the coax braid current and thereby "balance" the current in baluns with balanced output.

CUBE baluns and ununs have higher choking impedance (better common mode rejection) than simple snap on or slip on choke types.

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50:50 (1:1) CUBE™ Unun, 1.8-61 MHz, 1.5KW, Ladder Line or Balanced Antennas to Remote Antenna Tuner
50:50 (1:1) CUBE™ Unun, 1.8-61 MHz, 1.5KW, Ladder Line or Balanced Antennas to Remote Antenna Tuner
50:50 (1:1) CUBE™ Unun, 1.8-61 MHz, 1.5KW, Ladder Line or Balanced Antennas to Remote Antenna Tuner
SKU CU-1-1500DS
$109.95
Bullet 50:50 (1:1) HF Balun + Optional Dipole Kit - .1-61 MHz, 500 Watts PEP, up to 34 dB noise reduction!
Bullet 50:50 (1:1) HF Balun + Optional Dipole Kit - .1-61 MHz, 500 Watts PEP, up to 34 dB noise reduction!
Bullet 50:50 (1:1) HF Balun + Optional Dipole Kit - .1-61 MHz, 500 Watts PEP, up to 34 dB noise reduction!
SKU Bullet-1B-500EB
$79.95
CUBE 1:1 Balun, 5KW, 160-6 Meters, -38dB CMRR, FT8/RTTY
CUBE 1:1 Balun, 5KW, 160-6 Meters, -38dB CMRR, FT8/RTTY
CUBE 1:1 Balun, 5KW, 160-6 Meters, -38dB CMRR, FT8/RTTY
SKU CB-1-5000EB
$149.95
CUBE 1:1 Feed Line Choke Balun, 1.5KW, 1.8-61 MHz Eyebolt Version - Dipoles
CUBE 1:1 Feed Line Choke Balun, 1.5KW, 1.8-61 MHz Eyebolt Version - Dipoles
CUBE 1:1 Feed Line Choke Balun, 1.5KW, 1.8-61 MHz Eyebolt Version - Dipoles
SKU CB-1-1500EB
$119.95
CUBE Feed Line Choke Unun, 5KW, 1.8-61 MHz, 20-38 dB Common Mode Rejection, Static Bleeder/Ground Option
CUBE Feed Line Choke Unun, 5KW, 1.8-61 MHz, 20-38 dB Common Mode Rejection, Static Bleeder/Ground Option
CUBE Feed Line Choke Unun, 5KW, 1.8-61 MHz, 20-38 dB Common Mode Rejection, Static Bleeder/Ground Option
SKU CU-1-5000SO
$129.95
CUBE Feed Line Choke, 1:1, 5KW PEP, .2-5 MHz, AM Broadcast, 160 and 80 Meter Common Mode Noise Filter, 30 to 42dB Noise Suppression
CUBE Feed Line Choke, 1:1, 5KW PEP, .2-5 MHz, AM Broadcast, 160 and 80 Meter Common Mode Noise Filter, 30 to 42dB Noise Suppression
CUBE Feed Line Choke, 1:1, 5KW PEP, .2-5 MHz, AM Broadcast, 160 and 80 Meter Common Mode Noise Filter, 30 to 42dB Noise Suppression
SKU CU-1-5000LF
$129.95
On Sale
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
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
CUBE™ Vertical Antenna Feed Line Choke, 1.8-61 MHz, 1.5KW
CUBE™ Vertical Antenna Feed Line Choke, 1.8-61 MHz, 1.5KW
CUBE™ Vertical Antenna Feed Line Choke, 1.8-61 MHz, 1.5KW
SKU CUV-1-1500
List price $149.95
Save 20%
$119.95
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
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
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
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
Super Bullet 50:50 (1:1) HF Balun + Optional Dipole Kit - .1-61 MHz, 1500 Watts PEP, up to 38 dB noise reduction
Super Bullet 50:50 (1:1) HF Balun + Optional Dipole Kit - .1-61 MHz, 1500 Watts PEP, up to 38 dB noise reduction
Super Bullet 50:50 (1:1) HF Balun + Optional Dipole Kit - .1-61 MHz, 1500 Watts PEP, up to 38 dB noise reduction
SKU SBULLET-1B-1500EB
$119.95
Super Bullet 50:50 (1:1) HF Balun + Optional Dipole Kit - .1-61 MHz, 5000 Watts PEP, up to 60 dB noise reduction
Super Bullet 50:50 (1:1) HF Balun + Optional Dipole Kit - .1-61 MHz, 5000 Watts PEP, up to 60 dB noise reduction
Super Bullet 50:50 (1:1) HF Balun + Optional Dipole Kit - .1-61 MHz, 5000 Watts PEP, up to 60 dB noise reduction
SKU SBULLET-1B-5000EB
$149.95
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The high power ferrite impedance transformer series (> 1:1), configured with outputs to act as a baluns (unbalanced coax in to balanced load output) or as ununs (unbalanced coax input to unbalanced load output) are designed for demanding radio transmitter stations that run over 1,000 watts PEP or run continuous modes like AM, digital, RTTY, FM, etc. at high power levels. Radio contest operators, commercial shortwave broadcast, and industrial and commercial stations use these transformers for for a variety of balanced and unbalanced antenna loads.  Baluns are typically used for balanced loads and antennas like dipoles, loops, log periodics, and direct feed yagi/beams.  Ununs are used  with verticals, end fed wires, horizontal dipoles, G5RV/ZS6BKW, Zepps, vertical wire beams, etc).  All products are in an enclosed NEMA water resistant box with SO-239 input connector and stainless steel side/top studs with wing nuts or side and top eyebolts.  The enclosure box has mounting “side feet” for attachment to a post or antenna boom using nylon ties.