HF High Power Impedance Transformers

1032773009 - HF High Power Impedance Transformers
+2

50:300 (6:1) CUBE™ Balun, 1-61 MHz, 1.5/3KW (choose top stud/eyebolt/power rating)

Store/Antenna Products/CUBE Impedance Transformers (<1:1, 1:1, >1:1)/Off Center Fed Dipole Transformers
SKU CB-6-1500TS
$109.95
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50:300 (6:1) CUBE™ Balun, 1-61 MHz, 1.5/3KW (choose top stud/eyebolt/power rating)
Store/Antenna Products/CUBE Impedance Transformers (<1:1, 1:1, >1:1)/Off Center Fed Dipole Transformers
Product Details
MPN: CB-6-1500,CB-6-3000
Input ohms/Output ohms: 50 in, 300 out
Frequency Range < 2:1 SWR (MHz): 1-61
PEP Power Rating (watts): 1500/3000
Weight (pounds): 1500=2#, 3000=4 #

1500/3000 Watt 6:1 CUBE Balun™ – Model CB-6-1500/3000

Model CB-6-1500/3000 is a 6:1 (300:50) balun housed in a NEMA enclosure box (1.5KW in 4″ x 4″ x 2″, 3KW in 6" x 6" x 4") with two top studs capable of input power levels up to 1.5KW PEP watts when used with a matched load. The 6:1 ratio takes 50 ohms input and matches to 300 ohms balanced output from 1-61 MHz with SWR < 1.5:1 under matched load conditions. A great balun for windoms, OCF antennas >60 feet over ground, Hertz and folded dipole antennas, T2FD etc. 8 core, Use “EB” version with side eye bolts for wire attachments for OCF dipole use.

Typical SWR and impedance transformation from 1-61 MHZ shown below:

CB 6 1500 Graph png - HF High Power Impedance Transformers

This transformer requires a feed line choke to isolate the coax feed line from the antenna. A coax noise filter is also recommended.

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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.