high q

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high q

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Antennas : 6M : 6 meter Yagi Antennas Antennas : 70cm
  • Portable 70cm Quadruple Quad Beam - A suitable high gain 70cms antenna for SOTA operation was sought that did not have the drawbacks of a long Yagi antenna, principally a narrow beamwidth and bandwidth.
    [ Hits: 3545 | Votes: 3 | Rating: 8 ]
Antennas : Dipole
  • An Improved Multiband Trap Dipole Antenna - This improved multiband trap dipole introduces a new trap design and a change in trap location. The antenna features double-coaxial-cable-wound traps having lower reactance and a higher quality factor (Q) than earlier coax-cable traps by W8NX
    [ Hits: 8726 | Votes: 5 | Rating: 6 ]
Antennas : Homebrewing Techniques
  • From Transmitter to Antenna - A collection of articles on the subject of impedance, impedance matching and high-frequency power transmission by G3YNH
    [ Hits: 1159 | Votes: 0 | Rating: 0 ]
DX Resources : Beacons : Beacon stations
  • WA8YWO - High Frequency Expermental Beacon "WV". The Beacon operates on the frequency of 13.55567mhz. This Beacon is very low power. It operates under Part 15 of the FCC Rules and Regulations. It transmits with only 1.5 milliwatts of power
    [ Hits: 409 | Votes: 0 | Rating: 0 ]
Ham Radio : Clubs : North America : USA : Michigan
  • Te RADAR grou - The RACES ARES Disaster Assistance Repeaters (RADAR) group was formed by a team of amateur radio operators dedicated to providing high quality repeater communications for amateurs involved in public service communications or response to emergency/disaster situations.
    [ Hits: 259 | Votes: 0 | Rating: 0 ]
Ham Radio : Clubs : North America : USA : Pennsylvania
  • WA3TVG The Laurel Highlands VHF Society - The Laurel Highlands VHF Society, Inc. owns and operates the Acme repeater, located on the Chestnut Ridge in southwestern Pennsylvania.
    [ Hits: 294 | Votes: 0 | Rating: 0 ]
Manufacturers : Amplifiers
  • I0JXX - The I0JXX is an italian company that offers market their projects, also sells electronic products of high quality, both for Ham, both Broadcast and their accessories. VHF Antennas, mosfet power amplifiers, filters, insulators, power dividers, telescopic poles, antenna masts
    [ Hits: 2880 | Votes: 2 | Rating: 8.5 ]
Manufacturers : Antenna Parts
  • MicroMetal - Manufacture high quality low cost powder cores with a wide selection of shapes
    [ Hits: 617 | Votes: 0 | Rating: 0 ]
Manufacturers : Parts and Surplus
  • FMI - FMI provides superior solutions in the design and manufacture of frequency control devices including Voltage Controlled Temperature Compensated Crystal Oscillators (VCTCXO), voltage controlled crystal oscillator (VCXO), Temperature Compensated Crystal Oscillators (TCXO), crystal clock oscillators, high temperature oscillators, surface mount and crystal oscillator products, phase locked sources and more.
    [ Hits: 526 | Votes: 0 | Rating: 0 ]
Manufacturers : Test Equipment : Frequency Counter
  • Tabor Electronics - Tabor electronics produces high-end function generator, universal counters/timers, synthesizers, pulse, function and arbitrary waveform. Frequency counters
    [ Hits: 422 | Votes: 0 | Rating: 0 ]
Manufacturers : Test Equipment : Oscilloscope
  • Gage Applied Technologies - Gage applied technologies designs and manufactures high-speed data acquisition systems, high-speed digitizers in pci / cpci / pxi or pc oscilloscopes, providing utmost measurement fidelity for high frequency signals.
    [ Hits: 548 | Votes: 0 | Rating: 0 ]
Manufacturers : Test Equipment : Signal generator
  • Signal Forge - The signal forge 1000 signal generator is a portable, high-performance digital and rf signal source with a 1 ghz frequency range. features include digital, differential and ac coupled outputs
    [ Hits: 635 | Votes: 0 | Rating: 0 ]
Operating Modes : Morse code : Clubs
  • New England Historical Radio Society - The New England Historical Radio Society Inc. is an organization dedicated to the preservation of commercial Morse Radiotelegraphy on medium and high frequency.
    [ Hits: 529 | Votes: 0 | Rating: 0 ]
Shopping and Services : RF Tubes
  • Tube World - Your one-stop source for high quality new old stock vacuum tubes.
    [ Hits: 591 | Votes: 0 | Rating: 0 ]
Software : Filter Design
  • Nuhertz Technologies - Leading supplier of low and high frequency electronic filter design products for the design of wireless telecommunications equipment, semiconductors and more
    [ Hits: 1718 | Votes: 3 | Rating: 7.67 ]
  • AADE Filter Design - Dowwnload this free windows programs to design Butterworth, Chebyshev, Elliptic (Caur), Bessel, Legendre and Linear Phase low-pass, high-pass, band-Pass, and band-reject filters. Coupled Resonator band-pass filters
    [ Hits: 24825 | Votes: 113 | Rating: 7.16 ]
Technical Reference : Batteries
  • Batteries and QRP - Thanks to the popularity of cell phones, laptops and other personal electronic devices, the battery industry has been market-driven to produce higher capacity batteries in lighter weights than previously possible with yesterday's chemistries.As a result, a wide variety of battery types are available to the outdoor QRP operator.
    [ Hits: 504 | Votes: 0 | Rating: 0 ]
Technical Reference : Filters
  • 5th order High Pass VHF Filter - Sometimes many VHF-UHF modern transceivers have problems with BROADCAST Interference and CROSS-modulation from FM commercial broadcast stations this article shows a simple Batteworth HI-Pass VHF Filter to reduce this problem
    [ Hits: 1209 | Votes: 8 | Rating: 6.12 ]
Technical Reference : Mic wiring
  • Kenwood MC-50 modification - MC-50 microphone modification for high emphasis, connecto kenwood ts-50 to kenwood radios.
    [ Hits: 4084 | Votes: 12 | Rating: 7.4 ]

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