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Palomar Engineers CMNF-1500LF

Palomar Engineers CMNF-1500LF

Coax Common Mode Noise Filter - 1500/5000 Watts, 100 KHz to 10 MHz, up to -38 dB

HRO Discount Price: $89.95*


*After Coupons & Promotions.

Current Stock Status At These Ham Radio Outlet Locations
CMNF-1500LF Description     Hide

Product Details:

Type: NEW
Country/Region of Manufacture: United States
Filter Power Rating (PEP watts): 1500
Choking Impedance (ohms): 1000-6500
Common Mode Attenuation (db): 21-36 db
RFI Suppression Range (MHz): 1.8-60
Insertion Loss (db): .05
# Ferrite Filters: 5
Enclosure Size (inches): 4" x 4" x 2"
Typical Use: Noise filter at radio end of coax between amplifier and antenna tuner

CMNF-1500LF for transmitter/receiver coax lines up to 1500 watts PEP - 200 KHz - 7 MHz, Up to -38 dB Common Mode Noise Suppression!

For coax feed lines with receive and transmit signals, you will love the small size, wide frequency range and excellent attenuation of common mode noise interference

  • Reduces broadband common mode receiver noise* picked up on the outside of the antenna coax feed line.
  • Wide frequency range works on all brands of radios and coax fed antennas from 200 KHz to 7 MHz
  • Common mode noise rejection up to 20-36 DB (3-6 "S" units) depending on frequency
  • Simple plug & play installation: plug a short jumper from the CMNF-1500LF to your amplifier output and plug the feed line (or a jumper to your antenna tuner) into the other SO-239 CMNF-1500LF input. Either connector can be input or output. Rated at 1500 watts PEP.
  • will work with Bias-T antenna switches and will pass DC voltage from input to output with no attenuation
  • * not effective for noise from AC power lines or noise received directly by antenna

Installation Note
: For best results, and to reduce co-interference between choked and unchoked coax feed lines with multiple antennas, ALL antenna feed lines entering the radio room need to have a separate feed line choke particularly if they are at a different frequency then HF, like VHF or UHF.

If you use a antenna switch for multiple antennas in the .2-7 MHz range, place the CMNF-1500LF in the "common" line of the antenna coax switch and the antenna tuner/amplifier.

    Manufacturer's Website

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