9 simple

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9 simple

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Antennas : 160M
  • A Lowband Antenna that is Almost Free - The Shunt-fed Tower, an effective Low Band Antenna, uses your beam as a capacitive top-hat and only needs a simple feed network and a good ground system to work DX on 80M and 160M.
    [ Hits: 18615 | Votes: 4 | Rating: 7.75 ]
Antennas : 2M
  • 9 element yagi for 2 meters band  updated  pop - A simple design of a 9 elem. yagi antenna for 2 meters band
    [ Hits: 52922 | Votes: 259 | Rating: 5.23 ]
  • QM5 Yagi for 2 meters band - The QM5 antenna is a simple 5 elements Yagi with 1.88 m boom length for the lower 144 MHz SSB/MGM band, I used it mainly for Sporadic-E and MS contacts. It exhibits a forward gain of 9.17 dBd; i.e. 11.3 dB forward gain over the isotropic radiator, while the F/R is about 11.5 dB. Elements
    [ Hits: 6810 | Votes: 4 | Rating: 5.25 ]
  • Portable Yagi for 144MHz - Simple 7 element Yagi is ideal for portable operation. The elements can be removed and replaced in a few minutes. The 2.42 m boom will fit inside a car, the elements are made from 6mm solid aluminium rod.
    [ Hits: 14311 | Votes: 35 | Rating: 6.83 ]
Antennas : 80M
  • 80M Vertical antenna with capacitance hat - Simple wire antenna cheap to make, using readily available materials, Low angle radiation, with rejection of high angle signals Wide bandwidth, with resonance at the 80M DX window (3.790-3.800 MHz); and Maximum height is 40 feet
    [ Hits: 24921 | Votes: 23 | Rating: 7.05 ]
Antennas : Baluns
  • The 9:1 balun  pop - Homemade 9:1 antenna balun simple project
    [ Hits: 33194 | Votes: 36 | Rating: 6.16 ]
Antennas : Feed Lines
  • The DK7ZB-Match for Yagis - Simple, easy to built match developed in 1995 for Yagis with resistitive loads of 12.5, 18 and 28 Ohm.
    [ Hits: 3611 | Votes: 8 | Rating: 6.38 ]
Antennas : G5RV
  • G5RV Antenna Homebrew - Homebrew G5RV a simple multiband antenna. This article shows detailed pictures of a G5RV home made antenna, including antenna size and dimensions by 9M2ZAK
    [ Hits: 1545 | Votes: 4 | Rating: 7.25 ]
Antennas : J-Pole
  • HF J-Pole antenna - A Simple Nondirectional Antenna for Ten Meters QST February 1950, Easy to build J-Pole antenna for restricted space.
    [ Hits: 6538 | Votes: 3 | Rating: 3 ]
Antennas : Vertical
  • 9 band vertical HF antenna by RW3XA  pop - Simple vertical radiator with matching box. No traps, no tuner required for this multiband antenna
    [ Hits: 38464 | Votes: 43 | Rating: 7.34 ]
Antennas : WiFi
  • 43.33 Km LOS with USB WiFi stick  pop - Simple USB 802.11b WiFi adapter with original antenna used for this 27 miles long-range wifi connection test by adam 9A4QV.
    [ Hits: 51056 | Votes: 103 | Rating: 5.64 ]
Operating Modes : Packet Radio
  • The KISS Protocol - The KISS TNC provides direct computer to TNC communication using a simple protocol. KISS is a simple Host-to-TNC communications protocol
    [ Hits: 501 | Votes: 2 | Rating: 3.5 ]
Software : Antenna analysis
  • Yagi Modeler Applet - This java applet/application implements a simple yagi modeling code. The initial input is a really trivial 2 elmenent yagi.
    [ Hits: 2882 | Votes: 29 | Rating: 6.07 ]
Software : Radio Programming
  • CI-V Test - CI-V Test for Win98 (others not tested, but should work) is a simple freeware program to display received CI-V messages in Hex and text, and send commands for test purposes to the rig. This program is not intended to convienently control your rig, just explore the functions of CI-V.
    [ Hits: 2279 | Votes: 6 | Rating: 8.67 ]
Technical Reference : Dummy Loads
  • Cheap and simple HF dummy load - This is the report of a MFJ-259B analysis of two 100 ohm / 5 watts resistors in parallel partially in italian
    [ Hits: 2073 | Votes: 4 | Rating: 6 ]
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: 5289 | Votes: 21 | Rating: 6.1 ]
Technical Reference : Homebrew
  • ACWS: Automatic CW Sender by iz7ath - Simple circuit, with a simple push, transmit a memorized Cw messages
    [ Hits: 1438 | Votes: 1 | Rating: 8 ]
  • CW Filter - I0QM Gaussian CW Filter page This Filter for the weak signals is the evolution of the simple Universal State filter, already published on "Radio Rivista", the 8/1993
    [ Hits: 1849 | Votes: 2 | Rating: 8 ]
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: 1730 | Votes: 1 | Rating: 10 ]
Technical Reference : VHF Radios
  • VHF CW Transmitter - Simple CW transmitter for the two meters band
    [ Hits: 1932 | Votes: 2 | Rating: 7.5 ]

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