MAXI-CHOKER Coax Line Isolator/Balun, 1-61 MHz, 1.5/3KW, SO-239 In/Stud Output, FLAGPOLE OCF, G5RV, ZS6BKW, Hygain BN86/4000 Replacement, Ladder Line-Coax interface
Product Details
Brand: Palomar Engineers
MPN: MC-1-1500LL or MC-1-3000LL
Country/Region of Manufacture: United States
Effective Frequency Range (MHz): 1-161
PEP Power Rating (watts): 1500 or 3000 to 61 MHz, 500 watts to 161 Mhz
Choking Impedance Range (ohms): 500-6000 (1-61 Mhz)
Common Mode Attenuation (db): 20-35db
Estimated Insertion Loss (db): .25 db
Input Connector Type: SO-239 female
Output Connector Connector Type: Top Studs
Ground Connector (Y/N): optional
Enclosure Size (LxWxH inches): 8 or 12" long, 2.5 in diameter
MAXI-CHOKER™ MC-1-1500LL — Balanced Feed / Ladder-Line Interface
1–61 MHz 1.5 kW PEP SO-239 in • ¼″ stud out High CMRR
What it does
Clean, rugged **coax → balanced** interface for **G5RV, ZS6BKW, OCF with ladder-line tails, doublets, and flagpole verticals with balanced feed**. Adds a strong common-mode choke so the line stays balanced and RF stays off the outside of the coax. :contentReference[oaicite:8]{index=8}
Where to place it
- At the **transition** from coax to ladder line (or balanced studs).
- Keep the first few feet of coax away from radiating elements to minimize coupling.
- For maximum isolation, pair with a **CMNF at the radio** end.
Specs
| Range | 1–61 MHz (HF) |
|---|---|
| Power | Up to 1.5 kW PEP (ICAS) |
| I/O | SO-239 input • **¼″ stainless studs + wingnuts** output |
Duty cycle: Ratings are SSB PEP. For high-duty digital/CW or long key-down, reduce average power.
