low pass

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low pass

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Antennas : 40M : 40 meter Loop Antennas
  • Receiving antenna for low bands  updated - K9AY loop antenna installed at PA6Z Contest group. This is a receiving antennas for the low bands (160m, 80m and 40m). Include schematics and info on a building the control box, preamplifier and low-pass filter
    [ Hits: 19594 | Votes: 12 | Rating: 7.91 ]
Antennas : Beverage
  • Beverage switching box - Sharing beverage antennas with this switch boxes is possible. This article describes a 6-position remote antenna switch for Beverage antennas on 3 bands (160m, 80m, 40m). It allows selecting one of 6 antennas for each band without affecting other receivers. The system uses a control box with a rotary switch and a separate splitting box with bandpass filters for each band.
    [ Hits: 5510 | Votes: 3 | Rating: 4.33 ]
Manufacturers : Antenna Switches
  • Array Solutions - WX0B - Stacking and phasing HF and 6m arrays antenna switches and contesting devices. Custom low band antenna arrays, bandpass filters,commercial/Mil STd filters,microwave components, commercial broadcast filters.
    [ Hits: 5704 | Votes: 10 | Rating: 6.2 ]
Manufacturers : Antennas : HF : Active antennas
  • Ameco - Text books relating to amateur radio (HAM radio), highpass and lowpass power filters, transmitter test loads (dummy loads), study tapes and disks to learn morse code, transceiver preamplifiers, antenna signal boosters.
    [ Hits: 2225 | Votes: 0 | Rating: 0 ]
Manufacturers : Antennas : HF : Yagi Antennas
  • WIMO - All kinds of antennas, RF connectors, radio transceivers and accessories like power supplies, morse keys, lowpass filters and so on.
    [ Hits: 19296 | Votes: 37 | Rating: 5.59 ]
Manufacturers : Filters
  • Heros Technology Ltd - HF Radio Preselectors,BCB filters,Low Pass filters,Band Pass filter
    [ Hits: 602 | Votes: 2 | Rating: 10 ]
  • Idiom Press - CW keyers, Logikey, and antenna rotator controll like rotor-ez, and active audio low pass filters.
    [ Hits: 2701 | Votes: 2 | Rating: 9.5 ]
Software : Circuit Design
  • SVC Filter - Filter design software. A program designed to expedite the design and analysis of lowpass (and highpass) filters with nearest 5% component values. SVCfilter is 32-bit Windows electrical filter design software nicely written to help the radio amateur, technician or engineer design and analyze lumped-element lowpass and highpass filters.
    [ Hits: 1193 | Votes: 1 | Rating: 10 ]
Software : DSP
  • Free programmable DSP-Filter  pop - Free programmable LOW/HIGH/BANDPASS FIR filter in the audio range 0-4kHz
    [ Hits: 30339 | Votes: 86 | Rating: 5.82 ]
  • BR-universal-Filt - Freeware real time DSP filter particularly for applications of amateur radios , IIR, FIR filter, low-pass, high-pass, band-pass filter, band suppressor (notch filter) individually adjustable
    [ Hits: 6300 | Votes: 15 | Rating: 8.26 ]
Software : Filter Design
  • FilterCAD - A free computer aided design program to help users without special expertise in filter design to create filters using Linear Technology's monolithic filter ICs. With FilterCAD, you can design lowpass, highpass, bandpass and notch filters
    [ Hits: 11769 | Votes: 28 | Rating: 5.03 ]
Software : Satellite tracking
  • Orbitron - Orbitron is a freeware (cardware) application dedicaed to satellite tracking. Allow tracking of ISS, Iridium flares, ham radio satellites, International Space Station, satellite passes prediction, orbits, auto updates and alerting
    [ Hits: 17165 | Votes: 40 | Rating: 7.24 ]
  • Satel939 - This program allows the pursuit of satellites in real time or in wished dates as well as the forecasts of passage and the visiblity between satellites. Three lists of 15 satellites, choiss among 50 in memory
    [ Hits: 1460 | Votes: 4 | Rating: 9.25 ]
Software : Utilities
  • Diplexer - This program expedites the design of lumped-element diplexers using both the lowpass/highpass and the bandpass/bandstop topologies.
    [ Hits: 1498 | Votes: 5 | Rating: 4.6 ]
Technical Reference : Duplexers
  • A low cost UHF/VHF duplexer - Duplexers for dual band radio are usually high pass filter and low pass filter combined in the same box. This circuit is a design within a cost of US$10.
    [ Hits: 8615 | Votes: 16 | Rating: 5.88 ]
Technical Reference : Filters
  • A low pass filter circuit - A simple 7 element, Chebyshev low pass filter, rolls of at 30MHz. Attenuation is better than -40dB at 60MHz, -65dB at 90MHz, -80dB at 120MHz.
    [ Hits: 5303 | Votes: 21 | Rating: 6.1 ]
  • Second-Harmonic-Optimized Low-Pass Filters - Sometimes we need a little more output filtering than traditional designs offer. Look at a new filter that can give you that extra boost. QST article by W3NQN
    [ Hits: 879 | Votes: 0 | Rating: 0 ]
Technical Reference : HF Radios
  • Hombrewing an HF Transceiver - This page will describe the construction of a multi band SSB transceiver with all its components Band Pass Filter, Oscillator/Modulator unit, RX/TX Mixer TX Amp I.F. Amplifier AGC VFO Driver amplifier Receive audio amplifier Final amplifier Low pass filter Digital display and VFO stabiliser
    [ Hits: 4366 | Votes: 6 | Rating: 8.33 ]
Technical Reference : Radio Frequency Interference
  • 6m High Pass TVI filter - Are you suffering from TVI? Then why not try this filter for size. It is a three-stage high-pass filter that blocks low-frequency 50MHz signals while letting through UHF TV.
    [ Hits: 1474 | Votes: 2 | Rating: 3 ]
Technical Reference : TVI Filters

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