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.
Model-specific bundles Targets 5 key noise paths Typical 25–36 dB quieting* 10-minute install No Radio Mods Needed
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)
Icom
IC-7300, IC-7610, IC-705 and more—kits sized to each cable set.
Yaesu
FT-DX, FT-991A, FT-710 and others—quiet the braid and station cables.
Kenwood
TS-590/890/990 series—5-path filtering bundles for clean TX/RX.
Elecraft
K3/K3S/K4/KX series—quiet receive and rock-solid digital operation.
FlexRadio
Ethernet/USB-heavy shacks—extra attention on control/USB lines.
Generic, Misc Brands
Alinco, Vintage, CB, Hybrid shacks—choose Deluxe or Core and add ferrites as needed.
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
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