low pass filter

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low pass filter

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Manufacturers : Filters
  • Anatech Electronics - Anatech Electronics manufactures RF filters for communication systems, Military and commercial, as well as RF filters for Wireless applications. Products include, Band pass filters, Duplexers, Low pass, high pass and bandstop filters. Additional products such as RF cable assembly also available.
    [ Hits: 281 | Votes: 1 | Rating: 10 ]
Manufacturers : QRP Kits
  • HF Projects Kits - Provide service, quality home construction projects, travel antennas, masts and bases, hf and vhf amplifiers, low pass filters and z-match tuners
    [ Hits: 748 | Votes: 0 | Rating: 0 ]
Radio Equipment : HF Transceivers : Ten-Tec Jupiter
  • Ten-Tec Jupiter 538 Repair - Low-pass filter relay and reverse polarity repair notes by VE7TK
    [ Hits: 1260 | Votes: 3 | Rating: 9 ]
Radio Equipment : VHF-UHF Handhelds : Baofeng UV-3R
  • Baofeng UV-3R Low pass Filter Mod - This page describes a fix to the Low Pass Filter that provides more filtering of the second harmonic of 144-148 MHz.
    [ Hits: 1383 | Votes: 3 | Rating: 5 ]
  • Baofeng LPF mod by G0FTD - A modification of the UV3R Baofeng handheld transceiver to improve the built in low pass filter
    [ Hits: 404 | Votes: 0 | Rating: 0 ]
Software : Filter Design
  • Windipoles - Windipoles is a free passive real time filter simulator. Developed under Visual Studio .NET. No software installation required. Allows design, analysis, optimizations and plots, all graphically.
    [ Hits: 3094 | Votes: 31 | Rating: 7.52 ]
  • ScopeIIR - ScopeIIR: an Infinite Impulse Response (IIR) digital filter design tool for Windows. It designs high-order IIR filters based on analog filter prototypes, and can design lowpass, highpass, bandpass, and bandstop filters.
    [ Hits: 777 | Votes: 2 | Rating: 5.5 ]
Technical Reference : Calculators
  • FIlters calculator - Passive Band-Pass Filter, low-pass filter calculator
    [ Hits: 415 | Votes: 3 | Rating: 2.33 ]
Technical Reference : Filters
  • W3LPL Receiving Bandpass Filters - Project of receive only filters optimized for minimal loss and very high rejection of frequencies below 75% of the filter center frequency by K1TTT
    [ Hits: 1079 | Votes: 0 | Rating: 0 ]
  • Constant k Lowpass Filter Design - Online Constant - k Lowpass Filter calculator
    [ Hits: 450 | Votes: 12 | Rating: 3.67 ]
  • About Cavity Filters - Cavity filters are tipically circuitry behind a duplexer that allow only certain frequencies to pass
    [ Hits: 470 | Votes: 3 | Rating: 5.33 ]
  • 144MHz Low-Pass / 432 MHz Notch Filter - A combined 144MHz Low-Pass and 432 MHz Notch Filter by VE2ZAZ
    [ Hits: 729 | Votes: 3 | Rating: 1.33 ]
  • A home-built low-pass filter for 4m - This unit uses four capacitors, only two of which are variables, and a single tapped coil. It is built in a die-cast box, and has been tested up to 80W input power on 70MHz by G4CJZ
    [ Hits: 588 | Votes: 0 | Rating: 0 ]
  • 70 MHz low pass filter - An home made low pass filter for 70 MHz by IK0VAQ
    [ Hits: 730 | Votes: 3 | Rating: 4.67 ]
  • 50 MHz Terminating Low Pass Filter - This low pass filter terminates all harmonics from the 2nd to above the 10th harmonic in a better than 15 db return loss load
    [ Hits: 540 | Votes: 0 | Rating: 0 ]
  • Lowpass filter for 30m - 30m lowpass filter for the Softrock Ensemble RXTX tranceiver.
    [ Hits: 351 | Votes: 0 | Rating: 0 ]
Technical Reference : Homebrew
  • A CW Sidetone Bypass - A CW sidetone bypass for the NESCAF audio filter, a small and low cost circuit that works great.
    [ Hits: 481 | Votes: 0 | Rating: 0 ]
Technical Reference : TVI Filters
  • Characterizing a Bencher YA-1 Filter - Testing a Bencher YA-1 low-pass TVI filter with a spectrum analyzer with tracking generator.
    [ Hits: 220 | Votes: 0 | Rating: 0 ]
  • TVI filters - Examples of absorbtive low-pass filters in which the unwanted high-frequency energy is separated from the wanted output and then dissipated in matched resistors
    [ Hits: 356 | Votes: 0 | Rating: 0 ]
  • Television Notch Filters - Intersting article about TV interference, with several examples of TVI Filters, to reduce the passage of any RF above the 30 MHz including commercial Low Pass Filters, home made notch filters or coaxial filters.
    [ Hits: 454 | Votes: 2 | Rating: 3 ]

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