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am filter

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Antennas : 40M : 40 meter Loop Antennas
  • Receiving antenna for low bands  pop - 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: 18385 | Votes: 9 | Rating: 8.33 ]
Antennas : Feed Lines : Choke
  • Chokes Explained - A "choke" is the common name given to an inductor that is used as a power supply filter element. They are typically gapped iron core units, similar in appearance to a small transformer, but with only two leads exiting the housing
    [ Hits: 967 | Votes: 1 | Rating: 1.00 ]
DX Resources : Clusters
  • eham DX Spots - DX Spots web cluster interface with filtering features available to eham subscribers
    [ Hits: 1041 | Votes: 1 | Rating: 1.00 ]
Manufacturers : Amplifiers
  • RFAC Solutions - RF Connectors Cable Assembly Attenuators Filters High Power VHF Amplifiers, Adapters MMCX MCX SMA SMB SMC BNC TNC N from RFAC Solutions
    [ Hits: 1212 | Votes: 3 | Rating: 9.00 ]
Manufacturers : Antennas : VHF UHF Microwave
  • Amateur Radio Techniques - RF Filters an adjustable j-pole antenna manufacturer based in greece
    [ Hits: 532 | Votes: 0 | Rating: 0.00 ]
  • Duplexers.eu - We produce duplex filters for 6 m, 2 m, 70 cm, and 23 cm band but also for HF bands. Sella and produce products for Ham Radio Repeaters.
    [ Hits: 1732 | Votes: 1 | Rating: 1.00 ]
Manufacturers : Digital and Packet Radio
  • Communication Concepts, Inc. - Provide components to the amateur who wants to construct their own gear and to the professional who wants to save money and time in prototyping their circuit design, Filters, HF Amplifiers, Splitter Combiners, VHF Amplifiers, ATV
    [ Hits: 2492 | Votes: 4 | Rating: 4.25 ]
Manufacturers : QRP Kits
  • Micro908 Kit - A re-usable control & computing platform for antenna measurement, PSK31 digital modems, audio filtering, signal source & VFO, memory keyer by AMQRP
    [ Hits: 1401 | Votes: 1 | Rating: 10.00 ]
Shopping and Services : Electronic Components
  • All American - Distributor of electronic components, ull range of semiconductors (active components), including relays, circuit breakers, transistors, diodes, memory devices, microprocessors, microcontrollers, and other integrated cuircuits, as well as passive components, such as capacitors, resistors, inductors, and electromechanical products, including cable, switches, connectors, filters, and sockets.
    [ Hits: 880 | Votes: 0 | Rating: 0.00 ]
Software : Circuit Design
  • JavaScript Electronic Notebook, K7MEM - It consists of a group of JavaScript driven web pages that are intended for use as a quick reference for Ham Radio operators or just anyone interested in electronics. Offer calculators for Resistors, capacitors, inductors, power supplies, filters, attenuators and antennas
    [ Hits: 2887 | Votes: 14 | Rating: 7.99 ]
  • Elsie - Filter Design - Filter design software. Elsie is an uncommon commercial-grade lumped-element ("L-C") electrical filter design and network analysis program, directed toward the engineer or technician involved in that line of work.
    [ Hits: 2376 | Votes: 5 | Rating: 8.20 ]
  • 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: 1071 | Votes: 1 | Rating: 10.00 ]
  • Helical - A graphics-intensive bandpass filter program based on the helical resonator.
    [ Hits: 1681 | Votes: 2 | Rating: 9.00 ]
  • RF Filters - MS DOS Program for calculations of HP, LP and BP filters at VHF and UHF frequencies up to about 800 MHz by YU1AW
    [ Hits: 1171 | Votes: 6 | Rating: 4.33 ]
Software : DSP
  • FreqTweak - FreqTweak is a tool for FFT-based realtime audio spectral manipulation and display for Linux. It provides several algorithms for processing audio data in the frequency domain and a highly interactive GUI to manipulate the associated filters for each. It also provides high-resolution spectral displays in the form of scrolling-raster spectrograms and energy vs frequency plots displaying both pre- and post-processed spectra.
    [ Hits: 1207 | Votes: 3 | Rating: 9.00 ]
Technical Reference : Audio
  • Audio processor for SSB transceiver - This circuit consists of microphone amplifier and a high pass filter. Suitable to improve signal readability.
    [ Hits: 1293 | Votes: 1 | Rating: 1.00 ]
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: 7774 | Votes: 13 | Rating: 5.15 ]
Technical Reference : Filters
  • Interferences and filtering - General information on Filter passbands, interferences, TVI and RFI problems
    [ Hits: 1071 | Votes: 1 | Rating: 10.00 ]
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: 4239 | Votes: 6 | Rating: 8.33 ]
Technical Reference : Radio Frequency Interference
  • Filters and Ferrites in EMC - This article is about the characteristics and use of various filters and ferrites for solving amateur radio electromagnetic compatibility problems involving breakthrough of amateur signals into domestic equipment such as television sets, video recorders stereo sytems etc.
    [ Hits: 781 | Votes: 0 | Rating: 0.00 ]
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