Noise Filters
Noise Filters — Stop RF Interference at the Source
Tired of noise, hum, or RFI wiping out your signals?
Whether interference sneaks in through your coax, DC power leads, or AC mains, Palomar Engineers has a proven solution to silence it — and restore your receiver’s clarity.
As Ferrite Application Experts, we design and build filters that eliminate noise without affecting your desired signals — all engineered and tested in the USA.
Choose Your Noise Filter Type
Coax Noise Filters ›Stop RFI and common-mode noise traveling on your coax shield before it enters your shack. Ideal for reducing background hash and cross-band interference. |
DC Power Filters ›Eliminate noise generated by switching power supplies, computers, and in-shack electronics that ride on DC lines into your transceiver. Keeps your transmitted and received audio clean. |
AC Power Filters ›Stop AC line noise from entering your equipment via your 120/240V mains. Excellent for noisy urban environments or stations near industrial power systems. |
Why Use a Noise Filter?
Noise can enter your radio system from several paths — coax, power leads, and even household wiring. Palomar Noise Filters block these unwanted currents using ferrite technology engineered for real-world RF environments.
- Reduces background noise by up to 4–6 S-units
- Protects sensitive receiver front ends
- Improves transmitted audio quality
- Works from kHz to GHz without affecting signal performance
Tip: Add filters to each noise path for the quietest possible station.
Pro Tip from Palomar Engineers
For best results, use one filter per noise path:
- Coax – stops RFI entering or leaving your antenna system
- DC Power – cleans up switching supply noise
- AC Power – blocks mains-borne interference
Most stations benefit from two or more filters working together.
Get Started
Find your noise filter today and enjoy the quiet signals you deserve.
Palomar Engineers — Ferrite Application Experts since 1965.
Make it quiet. Make it clean. Make it Palomar.
