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: 18750 | Votes: 4 | Rating: 7.75 ]
Antennas : 2M
  • 9 element yagi for 2 meters band  pop - A simple design of a 9 elem. yagi antenna for 2 meters band
    [ Hits: 53445 | Votes: 263 | 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: 6869 | 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: 14335 | Votes: 35 | Rating: 6.83 ]
Antennas : 70cm
  • Bazooka dipole for 70 cm band - Here is a very simple 70cms dipole from Harald PD2HFE, which uses a single piece of RG-213 coaxial cable 34 cms in length.
    [ Hits: 16569 | Votes: 30 | Rating: 6.67 ]
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: 25089 | Votes: 23 | Rating: 7.05 ]
Antennas : Baluns
  • The 9:1 balun  pop - Homemade 9:1 antenna balun simple project
    [ Hits: 33339 | 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: 3637 | 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: 1587 | 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: 6616 | Votes: 3 | Rating: 3 ]
Antennas : Loop
  • A Hanging Rectangular Loop Antenna - A rotatable hanging loop antenna that has been specifically designed for hanging in a tree. Horizontally polarized with a broad azimuth pattern and gain of nearly 3dB over a simple horizontal dipole!
    [ Hits: 3867 | Votes: 10 | Rating: 7.41 ]
  • Cheap antenna to make from 160m - 6m  pop - The antenna is nothing more than a simple 2.4 metre square loop drawing pinned to the internal brick wall of the spare bedroom. Yep, thats right, the inside wall of the spare bedroom - ideal for flat dwellers, hotel rooms or whinging neighbours, The loop has a simple switched inductance at the top of the square loop and uses a simple coaxial stub to tune the antenna. An additional variable capacitor placed across the feedpoint can be used to fine tune the resonance of the antenna, by Andy G0FTD
    [ Hits: 46514 | Votes: 28 | Rating: 7.61 ]
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: 38751 | 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: 51135 | Votes: 103 | Rating: 5.64 ]
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: 2918 | Votes: 31 | Rating: 6.16 ]
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: 2287 | Votes: 8 | Rating: 7.75 ]
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 : Homebrew 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 ]
Technical Reference : VHF Radios
  • VHF CW Transmitter - Simple CW transmitter for the two meters band
    [ Hits: 1943 | Votes: 2 | Rating: 7.5 ]

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