HF/VHF Transceiver RFI/Noise Kits
HF Transceiver RFI / Noise Reduction Kits
Hear more signals and fewer gremlins. Our radio-specific kits tackle the five primary noise paths in a modern HF shack: coax braid, DC power, USB/control, audio/speaker, and key/foot switch. Pick your brand/model below and install in minutes.
Quick chooser
| Goal | Recommended kit | What it covers |
|---|---|---|
| Max quieting for a single HF transceiver | Deluxe (5-path) | Coax braid, DC power, USB/control, audio/speaker, key/foot |
| Fast improvement on a budget | Core (3-path) | Coax braid + DC power + USB/control |
| Add to an existing station bundle | Add-Ons | Extra ferrites for audio/speaker or key/footswitch lines |
Choose your brand (Click name)
What these kits fix
- Coax braid noise: common-mode current riding the outside of the shield
- Conducted RF on DC: RF back-feeding on 13.8 V lines
- USB/control hash: noise on cable shields (CAT/USB/Ethernet)
- Audio hum & RF feedback: speaker/mic lines picking up RF
- Key/footswitch glitches: hot-keying, RX mutes, odd behavior
60-second “Do I need it?” test
- Unplug the coax → note baseline noise.
- Touch center pin only to the jack → note noise.
- Touch shell only. If noise jumps, that’s braid-borne noise—your kit’s coax filter will help immediately.
Power & duty cycle
Kits are designed for 100 W class transceivers (SSB/ICAS). For high-duty digital, AM, or if you run an amplifier, add a MAXI-CHOKER™ feed-point choke and a CMNF at station entry for extra margin.
*Improvement varies with installation, band, and local noise sources. © Palomar Engineers®
Making the World a Quieter Place, One Ferrite at a Time
Also make sure you connect a good RF ground to the transceiver ground post.
Note to Flex Radio users: Use snap on ferrites for firewire cable, speaker cable and mic cable, Ring ferrites for Antenna output and DC power.
For additional RFI suppression, use a feed line choke at the antenna to suppress common current on the coax feed line – see our store for feed line choke alternatives for use at the antenna.
If you use a linear amplifier we have RFI kits for linear amplifiers that help suppress RFI in your shack or in your neighbor’s house.