HF High Power Impedance Transformers

MINI-BALUN 4:1 Coax Interface to Ladder Line, Loop, OCF antennas 500 Watts PEP, 1-61 MHz

SKU MB-4-500SS
$69.95
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MINI-BALUN 4:1 Coax Interface to Ladder Line, Loop, OCF antennas 500 Watts PEP, 1-61 MHz
Product Details
Brand: Palomar Engineers
MPN: MB-4-500TS
Country/Region of Manufacture: United States
Effective Frequency Range (MHz): 1-60
PEP Power Rating (watts): 500 SSB (25% duty cycle), 250 Watts CW/FT8 (50% duty cycle)
Estimated Insertion Loss (db): .25 db
Input Connector Type: SO-239 female
Output Connector Connector Type: Dual 1/4" stainless steel studs
Enclosure Size (LxWxH inches): 3" long, 2 in wide, 1.25" high

MINI-BALUN Features:

- Uses proprietary Multi-Turn, Multi-Ferrite technology for maximum power transfer and minimum SWR

- 500 Watts PEP, 50 ohm SO-239 connectors In, Dual Side Stud Output, 1-61 MHz (usable to 100 MHz) - AKA 4:1 BALUN

- Works for coax fed antennas from 1.8-61 MHz (160-6 meters) - excellent for multi-band loops, OCF, G5RV/ZS6BKW or Flag Pole OCF antennas fed with ladder line.

- 2-5 times more wider bandwidth and higher power then competing baluns of similar power ratings


This balun has a SO-239 input and 1/4" side studs output.

For Higher Power needs use our CB-4-1500TS or CB-4-5000TS







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.