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circuit

288 links - and 1 categories

Antennas : 40M : 40 meter Dipole Antennas
  • Shorty Forty Antenna - Short dipole antenna for 40 meter ham band. Can be put up in the space required for a 20 meter dipole.
    [ Hits: 12442 | Votes: 8 | Rating: 7.74 ]
Antennas : Theory
  • Optimizing Inductors - While intended mainly for antenna loading coils, this article also applies to other resonant systems, such as amplifier tank circuits.
    [ Hits: 552 | Votes: 1 | Rating: 10 ]
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: 2769 | Votes: 4 | Rating: 4.25 ]
  • Intuitive Circuits, LLC. - Intuitive circuit llc is a market leader in dtmf encoders and decoders, cash register surveillance, cash register security, and text inserter products. Amateur televisions ATV products
    [ Hits: 799 | Votes: 1 | Rating: 10 ]
Manufacturers : Parts and Surplus
  • Far Circuits - Printed Circuit Boards - FAR Circuits is exclusively a manufacturer of Printed Circuit Boards for electronic projects that are used by the Amateur Radio and electronic hobby enthusias
    [ Hits: 1638 | Votes: 5 | Rating: 9.4 ]
  • Sunstone Circuits - Sunstone Circuits is your easiest source for quoting and ordering printed circuit boards online. We are three respected brands in one: PCBexpress quickturn boards, PCBpro.com full-featured and design-checked boards, and PCB123 design software.
    [ Hits: 689 | Votes: 3 | Rating: 8 ]
Operating Modes : Radio Direction Finding
  • Far circuits - Direction finding projects, useful tools for t-hunting operations
    [ Hits: 1318 | Votes: 1 | Rating: 10 ]
  • HRX80 80 meters receivers for APRS - 80-meter peilontvanger / receiver includes printed circuit sample and list of components
    [ Hits: 1057 | Votes: 3 | Rating: 6.67 ]
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: 1112 | Votes: 0 | Rating: 0 ]
Technical Reference : Amplifiers
  • HL1INF RF Amplifiers - Circuits, pictures and data about toroids, tubes and home made power amplifiers
    [ Hits: 2430 | Votes: 1 | Rating: 10 ]
Technical Reference : Audio
  • Build An Audio Speech Processor - When one operates at low power on SSB, speech processing becomes almost essential to get through the QRM. The circuit is a low cost speech processor that will perform well with a minimum of construction effort.
    [ Hits: 4087 | Votes: 13 | Rating: 7.3 ]
Technical Reference : Components : Component Database
  • DigChip IC database - Provider of electronic components documentation. Offer a reliable tool to find semiconductors components technical information like parts, datasheets, cross reference, obsolete and new circuits.
    [ Hits: 613 | Votes: 6 | Rating: 4.17 ]
Technical Reference : Electronics
  • Delabs technologies Product Design and Engineering - Around 200 electronic circuits in pdf format or images, There are also over 1000 links to useful electronics, freeware, open source websites. There are some 100 useful documents, software and pcbs too. Mainly industrial electronics, instrumentation. Covers Various aspects of electronics and basics of circuit design.
    [ Hits: 747 | Votes: 2 | Rating: 7 ]
  • Making printed circuits - To make smart looking PCB's, all you need is a computer, a laser printer, copper clad board, etchant, a clothes iron and some Epson glossy photo paper.
    [ Hits: 863 | Votes: 3 | Rating: 5.67 ]
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 ]
Technical Reference : HF Radios
  • 5 Watt 40 Meters transmitter - This circuit is unique in that it uses a power mosfet as a final rather than a conventional bipolar transistor.
    [ Hits: 8443 | Votes: 7 | Rating: 5.29 ]
Technical Reference : Homebrew Technical Reference : Keyers
  • Simple Electronic Keyer - A simple keyer which can be built for as little as $6 with some junk box parts. Although this circuit is not a true iambic keyer, it is capable of producing perfectly sounding CW.
    [ Hits: 5140 | Votes: 7 | Rating: 7.71 ]
  • Easy Morse Code Keyer Circuit - based on the famous Curtis family of morse keyer chips and has a proven record of dependability.
    [ Hits: 7553 | Votes: 4 | Rating: 7.25 ]
Technical Reference : QRP Projects : QRP CW Transceiver
  • A CW TX for 80 meters band - This simple circuit will give about 1.2 Watts of output when powered from a 13.8VDC supply.
    [ Hits: 1733 | Votes: 1 | Rating: 10 ]

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