---
product_id: 171542893
title: "311400 Ferrite Core Material 31 Mix ID 1\" 3/8 37mm Black Noise Cancellation Filter 1-1000 MHz Adults, Professional-Audience Unisex Two-Way Radio Electronic Component Ferrites"
brand: "rf choke"
price: "₩236790"
currency: KRW
in_stock: true
url: https://www.desertcart.kr/products/171542893-311400-ferrite-core-material-31-mix-id-1-3-8
store_origin: KR
region: South Korea
---

# 1.47" (37.2mm) inner diameter 453Ω noise suppression Proudly made in USA 311400 Ferrite Core Material 31 Mix ID 1" 3/8 37mm Black Noise Cancellation Filter 1-1000 MHz Adults, Professional-Audience Unisex Two-Way Radio Electronic Component Ferrites

**Brand:** rf choke
**Price:** ₩236790
**Availability:** ✅ In Stock

## Summary

> 🛡️ Silence the static, amplify your signal!

## Quick Answers

- **What is this?** 311400 Ferrite Core Material 31 Mix ID 1" 3/8 37mm Black Noise Cancellation Filter 1-1000 MHz Adults, Professional-Audience Unisex Two-Way Radio Electronic Component Ferrites by rf choke
- **How much does it cost?** ₩236790 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/171542893-311400-ferrite-core-material-31-mix-id-1-3-8)

## Best For

- rf choke enthusiasts

## Why This Product

- Trusted rf choke brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Perfect Fit Precision:** 1.47" inner diameter clamps securely on cables up to 37.2mm
- • **Ultimate Noise Defense:** 453 ohms impedance for superior interference blocking
- • **Broad Frequency Mastery:** Effective noise cancellation across 1-1000 MHz spectrum
- • **Effortless Installation:** Quick clamp-on design with durable black Velcro strap
- • **Crafted for Professionals:** Engineered in the USA for unmatched quality and reliability

## Overview

The 311400 Ferrite Core Material 31 Mix is a high-performance noise cancellation filter with a 1.47" (37.2mm) inner diameter, delivering 453 ohms of suppression impedance. Designed for professional two-way radios and electronic components, it clamps on easily with a black Velcro strap and operates effectively across 1-1000 MHz frequencies. Proudly engineered and manufactured in the USA for superior quality.

## Description

RF CHOKES Our ferrite cores work to erase noise that is generated by a portable device or equipment that would otherwise be propagated around them. They also work as a filter to get rid of those noises generated by other devices, so that your notebook PC does not get those noises that would otherwise cause malfunction for example. Ferrite cores erase and filter noises, outgoing and incoming noises at the same time. There are many different ferrite cores offered, varied by materials, and identified by two digits numbers. Our Material 31 or, sometimes called Mix 31 is the latest development for noise suppression. Covering the broadest frequency range of 1 – 1000 MHz to respond to the ever-growing electromagnetic noise pollution of today. Advancing material technologies since the 1950’s in the U.S. 1pc/order unless noted as a multi-quantities pack, bulk pack. TROUBLE SHOOT TIPS Install the ferrite core at the equipment side of the cable. If a cable has equipment that needs to be protected on both sides, install at each end. Make a loop of cable over the ferrite core. Make as many loops as you can and/or install multiple ferrite cores until you successfully suppress offending noises. One loop of cable over the core has 4 times the increased erasing/filtering power, or you could use 4 cores for the same effectiveness. When there is a known offending noise present, making multiple loops of cable over the core is necessary. You can install the ferrite cores at affected devices, as well as at offending devices. Depending upon the circumstances, identifying and troubleshooting both the affected and offending devices are necessary. They come in two split halves, and clamp on to the cable whether it has a connector, or is hard wired to equipment. Atmospheric noises and static cannot be filtered by the ferrite cores. Only common-mode current caused noises can be filtered. C2025 Olympix Corp NY

## Features

- The newest technology Material 31 Mix for the broadest range of noise suppression.
- Inner Diameter 1.47" 37.2mm
- Clamp on with a black Velcro strap
- Suppression Impedance 453 ohms
- Engineered and made in the U.S.A.

## Product Details

- **Brand:** RF Choke
- **Color:** Black
- **Special Feature:** Portable
- **Frequency Range:** 1-1000 MHz
- **Water Resistance Level:** Not Water Resistant
- **Included Components:** Ferrite core, Black Velcro strap
- **International Protection Rating:** IP54
- **Manufacturer:** RF Choke

## Images

![311400 Ferrite Core Material 31 Mix ID 1" 3/8 37mm Black Noise Cancellation Filter 1-1000 MHz Adults, Professional-Audience Unisex Two-Way Radio Electronic Component Ferrites - Image 1](https://m.media-amazon.com/images/I/81yeEg9zGYL.jpg)
![311400 Ferrite Core Material 31 Mix ID 1" 3/8 37mm Black Noise Cancellation Filter 1-1000 MHz Adults, Professional-Audience Unisex Two-Way Radio Electronic Component Ferrites - Image 2](https://m.media-amazon.com/images/I/81Ky17L5UFL.jpg)
![311400 Ferrite Core Material 31 Mix ID 1" 3/8 37mm Black Noise Cancellation Filter 1-1000 MHz Adults, Professional-Audience Unisex Two-Way Radio Electronic Component Ferrites - Image 3](https://m.media-amazon.com/images/I/714AlrKS6qS.jpg)
![311400 Ferrite Core Material 31 Mix ID 1" 3/8 37mm Black Noise Cancellation Filter 1-1000 MHz Adults, Professional-Audience Unisex Two-Way Radio Electronic Component Ferrites - Image 4](https://m.media-amazon.com/images/I/81dACuEB2bS.jpg)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-02-03*