Icom IC-7300 RFI/Noise Reduction Kit — Deluxe (5-Filter System)
Tame shack noise and “RF in the shack” at its source with a purpose-built kit for the Icom IC-7300. This deluxe package targets the five most common noise paths—coax braid, DC power, USB/control, audio/speaker, and key/foot switch—so you hear more signals and fewer gremlins. Easy install. Immediate, repeatable results.
What this fixes (plain English)
Noise rides in on two highways: the outside of your coax (common-mode on the braid) and your station cables (power, USB, audio, key lines). This kit chokes those paths so your IC-7300 hears more DX and less hash.
- Lower noise floor and a calmer waterfall
- Less RF feedback into audio/USB/mic
- Cleaner pattern—feed line isn’t part of the antenna
What’s in the Deluxe kit (5 paths)
- Coax Noise Filter (radio end): high-impedance choke for the braid at the IC-7300 input
- DC Power line filter: ferrite treatment for the 13.8 V line to block conducted RF
- USB/CAT control filter: snap-on ferrites to stop RF riding the cable shield
- Audio/Speaker filter: ferrites to keep audio clean and hum-free
- Key/Foot switch filter: ferrites to stop hot-keying and erratic keying from RF pickup
Everything sized for the IC-7300 station cabling; simple, step-by-step application.
Quick install (10 minutes)
- Coax filter: Insert at the IC-7300 RF input (or station entry). Hand-tight, then snug—do not overtighten.
- DC filter: Place ferrites close to the radio’s power jack; snap and fully seat.
- USB: Snap ferrites near radio end; add a second at PC end if needed.
- Audio/Speaker: Snap near radio; one more near speaker if hum persists.
- Key/Foot: Snap near the IC-7300; verify solid keying at full power.
Power/Duty: Rated for typical SSB/ICAS use with a 100 W class transceiver. For high-duty digital or AM, reduce average power or add a feed-point choke for extra margin.
- MAXI-CHOKER™ Feed-Point Choke — keep TX current on the antenna, not the coax
- Station-Entry CMNF — add one more choke where your coax enters the shack
- Antenna Switch Kit — choke each switch input so unused lines don’t share noise
- Ferrite Assortment Pack — snap-ons for rotor/control lines and accessories
Results vary with installation, band, and local noise sources. © Palomar Engineers®
Got other ICOM radios - check out our other ICOM RFI Kits
Icom 7300 RFI Kit Flyer Download (not available on eBay)
If you use a linear amplifier use a Palomar Engineers Amplifier RFI kit (part# RFI-LA-GAC) for additional RFI interference suppression.
