antenna ap 8

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antenna ap 8

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Antennas : 40M : 40 meter Dipole Antennas
  • Trapped dipole for 80 and 40 m - This article explores a theoretical model for the losses of an 80m / 40m trapped inverted V dipole antenna system using a bootstrap coax trap, but does not examine the pattern of the antenna.
    [ Hits: 2730 | Votes: 0 | Rating: 0 ]
Antennas : 40M : 40 meter Loop Antennas
  • 40-meter Rectangular Loop Antenna - A 40-meter antenna that provides good local and regional coverage during the day and good DX capability at night
    [ Hits: 2245 | Votes: 2 | Rating: 3.5 ]
Antennas : 70cm
  • 6 element UHF Yagi antenna - A standard 6 elements design scaled for UHF application. All material used in this project are easily obtainable tubes and rods which is limited within a total budget of $18.
    [ Hits: 3893 | Votes: 10 | Rating: 6.79 ]
Antennas : 80M
  • EH antenna for 80 meters F8APF - Based on IZ5CCS design F8APF describe the homebrewing of an EH antenna for 80 meters band
    [ Hits: 3957 | Votes: 1 | Rating: 2 ]
Antennas : Array
  • Bruce arrays for 80 and 160m - Antennas with gain and bandwidth for 80 and 160 meters band. Simple wire antenna capable of considerable gain
    [ Hits: 9003 | Votes: 3 | Rating: 9.33 ]
Antennas : Collinear Antennas : Dipole
  • Wire antenna with coaxial cable traps - This multiband antenna 10-80 meters is a home made project by I1BAY. Has been used for SOTA activations with great results. Traps are done with coax cable turns, dimensions are in the attached schema.
    [ Hits: 9250 | Votes: 3 | Rating: 7 ]
  • 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 : End-Fed
  • The versatile end-fed wire - Benefits and limitations of an end feed antennas. By Peter Parker VK3YE - first appeared in Amateur Radio, June 1998
    [ Hits: 8759 | Votes: 5 | Rating: 7 ]
Antennas : Loop
  • 160 m Balanced Coaxial Receiving Loop Antenna - W4HM explanation of the 160 meter balanced coaxial receiving loop antenna, easily adaptable to a 40 and 80 meters band
    [ Hits: 6569 | Votes: 7 | Rating: 6.4 ]
  • Loop Antennas and Calculator - KA1FSB loop calculator give you a quick overview of the feasibility of "squeezing" a loop into your available yard or apartment space. The easy calculator yields a reasonable approximation of dimensions, to within 5% over the amateur bands, using typical wire gauges ranging from 12-18 AWG.
    [ Hits: 16095 | Votes: 60 | Rating: 6.52 ]
Antennas : Multiband
  • 6-Band Windom antenna  pop - Theory and construction of a novel trapless center-loaded off-center-fed (cl-ocf) dipole or windom antenna for the 80, 40, 30, 20, 15 and 10m hf amateur radio bands
    [ Hits: 50562 | Votes: 45 | Rating: 6.82 ]
  • Another vertical antenna for 30, 40 and 80 meters - This article is to describe a multi band DX-dedicated antenna offering a minimum of compromises (such as lossy traps), for the hams not having any high-support
    [ Hits: 4375 | Votes: 4 | Rating: 3.5 ]
Antennas : Stealth
  • DCTL Antennas and other compact antennas - The Distributed Capacitance Twisted Loop is an inexpensive, effective, resonant alternative that can fit in a 8' tall by 12' or so wide space, like a wall, or balcony, even on 80 meters. 160 meters from an apartment, a full wave look and a cage dipole
    [ Hits: 4403 | Votes: 1 | Rating: 5 ]
  • HF antenna for high rise dwellers - If you have ever tried transmitting on HF from a tall block of apartments, where it's just not possible to erect a substantial aerial system, then this article is for you
    [ Hits: 5014 | Votes: 5 | Rating: 7.92 ]
Antennas : Vertical Antennas : W3DZZ
  • W3DZZ multiband dipole - The multi-band trapped dipole is resonant on approx 3.7, 7, 14, 24 7 28.5 Mhz. The overall top length needs to be approximately 32.9 Meters
    [ Hits: 10464 | Votes: 20 | Rating: 6.9 ]
Radio Equipment : HF Transceivers : Icom IC-746
  • ICOM 746 Temperature Measurements - The ICOM 746-Pro has acquired a history of NEC 1678G (IC-151) MMIC and driver transistor 2SK2975 failures. The failure of IC-151 appears to be a combination of ESD damage from electrostatic charge on the antenna entering IC-151, and perhaps thermal heat.
    [ Hits: 2262 | Votes: 0 | Rating: 0 ]

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