Filters, Antenna filters

The short wave, but also other bands are affected by interferences. Some of these stem from natural processes, for example noise from thunderstorms or processes in the ionosphere, others are man-made disturbances. These are caused by nearby transmitters, by misaligned transmitter signals and also by overstrained receiver inputs.


In most cases, filters can be a great help here. A high frequency filter limits the bandwidth that is received, for example from the antenna to the receiver, or from the power amplifier to the antenna. In this way unnecessary components of the signal are filtered out. Modern SDR receivers implement the filter technology in the form of algorithms in the processor, but practice has shown that classical filters still offer many possibilities to improve reception.


Other filter technology is used to suppress interference from devices, for example in the case of direct radiation. Here WiMo offers a wide range of ferrites, which are not only used to build transformers, but can also be used as chokes to effectively prevent direct radiation.

 

Items 21-30 of 74

Filter
  1. Yaesu CW-Filter 300Hz f. FT-DX101
    Yaesu CW-Filter 300Hz f. FT-DX101

    CW Roofing Filter 300 Hz, FT-DX101D/MP Sub-Receiver.

    In stock, shipped in 1 to 2 days

    €164.40
    incl. VAT, plus shipping €138.15
    SKU XF-129CN
  2. Antennas Amplifiers bandpass filter 144-148 MHz, 1500W
    Antennas Amplifiers bandpass filter 144-148 MHz, 1500W

    2m bandpass filter with active cooling, N-connectors, low insertion loss

    In stock, shipped in 1 to 2 days

    €325.00
    incl. VAT, plus shipping €273.11
    SKU 18460.6320
  3. MFJ-1048 Pre-Selector 1,6-33 MHz
    MFJ-1048 Pre-Selector 1,6-33 MHz

    The MFJ-1048 is a passive preselector with which the reception characteristics of almost every radio or receiver can be improved.

    Available from 30.06.2024

    €227.50
    incl. VAT, plus shipping €191.18
    SKU MFJ-1048
  4. Low Pass Filter 30 MHz 2000W
    Low Pass Filter 30 MHz 2000W

    Robust low pass filter 30 MHz 2000Watt

    In stock, shipped in 1 to 2 days

    View accessories
    €275.00
    incl. VAT, plus shipping €231.09
    SKU LPF30-2000
  5. Bandpass filter 144-146 MHz, 200W
    Bandpass filter 144-146 MHz, 200W

    Effectively blocks out unwanted interference signals, very steep edges, N socket

    In stock, shipped in 1 to 2 days

    €225.00
    incl. VAT, plus shipping €189.08
    SKU 18460.0656

Items 21-30 of 74

Filter

FAQ

What is an antenna filter and what is it used for?
An antenna filter is a device that prevents interference in signal transmission and provides a clear signal. It is used to reduce interference from other electrical devices or radio networks and improve the signal for audio or video transmission.
What are the types of antenna filters?
There are different types of antenna filters, such as bandpass filters, notch filters and diplexers. Each filter has a specific application area and may be optimized for specific radio frequencies. It is important to select the right filter for your needs.
How do I install an antenna filter?
Installing an antenna filter can vary depending on the model and application. Generally, the filter is connected between the antenna and the receiver. It is important to read the manufacturer's instructions carefully and follow all steps exactly to ensure a flawless installation.