Coax Common Mode Noise Filter - 1500/5000 Watts, 100 KHz to 30 MHz, up to -38 dB Common Mode Noise Suppression!
Product Details
MPN: CMNF-1500LF
Type: NEW
Country/Region of Manufacture: United States
Filter Power Rating (PEP watts): 1500
Common Mode Attenuation (db): 21-36 db
RFI Suppression Range (MHz): 100 Khz - 30 MHz
Insertion Loss (db): .05
Enclosure Size (inches): 4" x 4" x 2"
Typical Use:: Noise filter at radio end of coax before antenna switch
CMNF-1500LF / CMNF-5000LF — Low-Frequency Coax Noise Filter (0.2–7 MHz)
0.2–7 MHz 50 Ω • SO-239 1.5 kW / 5 kW PEP Optimized for 160 m
What it fixes
Low-band common-mode can be stubborn. LF models deliver higher choking impedance below 10 MHz for quieter 160/80 m and AM BCB operation.
- Cuts LF/HF hash on receive
- Helps stop RF from riding the braid back to the shack
- Great companion to long-wire/OCF/EFLW installs
Placement
At station entry or radio end. For tough 160 m cases, use two filters in series (entry + radio) for extra isolation.
Which model?
- Up to 1.5 kW PEP: CMNF-1500LF
- Legal limit: CMNF-5000LF
| Range | 0.2–7 MHz (low-band optimized) |
|---|---|
| Impedance | 50 Ω |
| Power | 1.5 kW / 5 kW PEP |
| Connectors | SO-239 |
Duty-cycle: Allow headroom on continuous modes; keep components within temperature limits.
Low-Band Bundle: 2× LF filters + two jumpers (entry + radio) for maximum CMRR on 160/80 m.