HF Impedance Transformer Kits

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







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.