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  • Home
  • Hi-Z Tap Boards
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  • Filters & Chokes
  • How To Order
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KD2C

KD2C KD2C KD2C

Welcome to KD2C SDR Products - serving the amateur radio community

Welcome to KD2C SDR Products - serving the amateur radio communityWelcome to KD2C SDR Products - serving the amateur radio community

Filters

HPF - 1

HPF - 1

HPF - 1

The HPF-1 is a Receive Only high pass filter designed to reduce the RF signal levels below 3 MHz. The HPF-1 is effective in reducing or eliminating interference caused from nearby AM broadcast transmitters. The HPF-1 will strongly attenuate signals below the 80 meter amateur band. The HPF-1 comes with a bypass switch which allows you to bypass the filter at any time. The SMA connectors are conveniently located on the rear of the unit, this allows you to save space and avoid clutter on your desktop. 


Impedance: 50 Ohms

Attenuation Range: DC – 3 MHz

Bypass: Switchable

Insertion Loss: 3dB, 0dB in Bypass

Case: Diecast Aluminum Alloy

Connectors: SMA 

Price: $40

HPF - 2

HPF - 1

HPF - 1

The HPF-2 is a  Receive Only high pass filter designed to reduce the RF signal levels below 1.8 MHz. The HPF-2 is highly effective in reducing or eliminating interference caused from nearby AM broadcast transmitters. The HPF-2 will strongly attenuate signals below the 160 meter amateur band. The HPF-2 comes with a bypass switch which allows you to bypass the filter at any time. The SMA connectors are conveniently located on the rear of the unit, this allows you to save space and avoid clutter on your desktop.

 

Impedance: 50 Ohms

Attenuation Range: DC – 1.8 MHz

Bypass: Switchable

Insertion Loss: 3dB, 0dB in Bypass

Case: Diecast Aluminum Alloy

Connectors: SMA 

Price: $40

FMB - 1

HPF - 1

FMB - 1

The FMB-1 is a  Receive Only notch filter designed to reduce the RF signal levels in the FM broadcast band to your SDR receiver. The FMB-1 is highly effective in reducing or eliminating interference caused from nearby FM broadcast transmitters. The FMB-1 comes with a bypass switch which allows you to bypass the filter at any time. The SMA connectors are conveniently located on the rear of the unit, this allows you to save space and avoid clutter on your desktop. 


Impedance: 50 Ohms

Attenuation Range: 88 – 108 MHz

Bypass: Switchable

Insertion Loss: 3 dB, 0dB in Bypass

Case: Diecast Aluminum Alloy

Connectors: SMA 

Price: $40

DOWNLOADS

HPF-1 Instructions (pdf)

Download

HPF-2 Instructions (pdf)

Download

FMB-1 Instructions (pdf)

Download

TRANSCEIVER FILTERS

HPF-3

HPF-3

HPF-3

  

The HPF-3 is a high pass filter designed to reduce the RF signal levels below 3.5 MHz. The HPF-3 is effective in reducing or eliminating interference caused from nearby AM broadcast transmitters. The HPF-3 will strongly attenuate signals below the 80 meter amateur band. 


Impedance: 50 Ohms

Maximum Power: 250W

Attenuation Range: .1 – 3.5MHz

Insertion Loss: .25dB

SWR: 1.1 – 1.2

Case: Diecast Aluminum Alloy

Connectors: SO-239

Price: $70

HPF-4

HPF-3

HPF-3

The HPF-4 is a high pass filter designed to reduce the RF signal levels below 1.8 MHz. The HPF-4 is

  

The HPF-4 is a high pass filter designed to reduce the RF signal levels below 1.8 MHz. The HPF-4 is effective in reducing or eliminating interference caused from nearby AM broadcast transmitters. The HPF-4 will strongly attenuate signals below the 160 meter amateur band. 


Impedance: 50 Ohms

Maximum Power: 250W

Attenuation Range: .1 – 1.8 MHz

Insertion Loss: .25dB

 SWR: 1.1 – 1.2 

Case: Diecast Aluminum Alloy

Connectors: SO-239

Price: $70

RF CHOKES

1:1 Common Mode Choke

The CMC-1 is a receive only 1:1 common mode choke specifically designed for SDR's and any HF receiver. It dramatically suppresses noise and reduces the noise floor between 1Hz to 5MHz but is effective up to 30MHz.  


Noise Suppression Range: 1HZ - 30MHz

Impedance: 50 Ohms

I/O Ratio: 1:1

Case: Flame Retardant ABS Plastic


Three Models are Available:

CMC-1B :  BNC Connectors             $27

CMC-1S:   SMA Connectors             $27

 CMC-1W:  Weatherproof  Case    $32 

                 (CMC-1W  - BNC Connectors Only)                   




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