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Antennas : 2M- Squarooka Antenna - squared bazooka for 2 meters band
- Sort of similar to the one of the 6m omni. Instead of using twin-lead, this design makes use of a more or less regular double bazooka antenna (coaxial dipole). Your attention shall be drawn to the available standart literature, such as Rothammel.
In order to "compute" the dimension, Karl Rothammel mentioned that the total length of the dipole shall be 95% of the free-space wavelength. The short-circuit bridges (closing the folded dipole) are to be placed at a distance-fraction being equal to the velocity factor of the coax cable used, which will be 66% using RG-58 or RG174.
[ Hits: 353 | Votes: 0 | Rating: 0 ]
- Parallel Square Conductor Transmission Line Calculator
- Design a parallel square stock balanced transmission line with this calculator.
[ Hits: 257 | Votes: 2 | Rating: 10 ]
- 4 Square vertical system
- This page is a short description of the four phased verticals system for 160m 80m and 40m
[ Hits: 542 | Votes: 0 | Rating: 0 ]
- 40 m Wire 4 Square Vertical Array
- 40 meter four square vertical array using four full-size 40 meter ground plane antennas, using only two radials
[ Hits: 1068 | Votes: 2 | Rating: 9 ]
- 80M 4-Square
- An antenna project to obtain a bigger signal on the
80 Meter (3.5 to 3.8 MHz) amateur radio band
[ Hits: 836 | Votes: 0 | Rating: 0 ]
- The 4-Square Rx Vertical Array
- A project for a 4 square vertical array receiving antenna
[ Hits: 584 | Votes: 0 | Rating: 0 ]
- 40 Meter 4 Square
- A four square antenna for the 40 meters band with pictures, project history and antenna design
[ Hits: 466 | Votes: 0 | Rating: 0 ]
- 15m Four Square antenna
- A 21 MHz Four Square Beam Antenna
This popular antenna for the lower bands, can also work well on 15 meters, QST Article
[ Hits: 1352 | Votes: 0 | Rating: 0 ]
- 40m Compact 4-Square Antenna
- The EA5AVL 40M Compact 4-Square Antenna was designed to provide excellent DX communications on the 40m band, utilising readily available components and be relatively easy to construct
[ Hits: 1131 | Votes: 3 | Rating: 10 ]
- 4 Square K9AY Antenna
- 4 Square K9AY Array project for 80 and 40 meters band
[ Hits: 555 | Votes: 0 | Rating: 0 ]
- 4 Square Antenna Experiences
- Article on foru-square antennas by Jack Schuster, W1WEF and and Tom Frenaye, K1KI appeared on National Contest Journal december 1996
[ Hits: 899 | Votes: 0 | Rating: 0 ]
- Off-center Fed Windom Antenna with Vertical Radiator
- 80 to 6 meters, 2 KW, designed to be used at heights of only 25 to 45 feet, includes a twenty foot long vertical radiator
[ Hits: 1010 | Votes: 3 | Rating: 9 ]
- NMF Technology
- Amateur radio antenna accesories manufacturer, produces four square antenna combiner, antenna controllers, antenna stack match and antenna switches
[ Hits: 153 | Votes: 2 | Rating: 10 ]
- K8UR Phased Array Switchbox
- A Phased Array Switchbox by ComTek founder K8UR, switch your 4-Square in 8 directions and control it remotely over the internet
[ Hits: 317 | Votes: 2 | Rating: 5.5 ]
- SWR ANTENNA ANALYZER + WSPR TX
- Available worldwide can be used as Arduino Shield or plug it in to you PC , or with a bluetooth adapter connect to Android.
With a highly optimized software, KAI200 brings you:
a. Antenna analyzer form 1 up to 200 Mhz;
b. WSPR transmiter (set up by serial terminal);
c. Square Wave Signal generator
KAI200 is all you need for your radio whatever it is
Yaesu, Icom, Kenwood or Drake and DIY projects.
[ Hits: 321 | Votes: 8 | Rating: 9.62 ]
- Amateur Radio Grid Square Locator
- Amateur Radio - Ham Radio Maidenhead Grid Square Locator Map
[ Hits: 994 | Votes: 2 | Rating: 4 ]
- DX World Map
- A large jpeg DX World map that include ITU Zones, grid squares and prefixes
[ Hits: 6872 | Votes: 34 | Rating: 7.43 ]
- Yaesu Mark V FT 1000 MP
- A page dedicated to Yaesu Mark V/FT-1000MP transceiver squarely aimed at the high performance contest and DX crowd.
[ Hits: 350 | Votes: 0 | Rating: 0 ]
- QTH locator calculating functions in Python
- Python functions for converting decimal coordinates to QTH locator and backwards.
Useful for program software developers to determine grid square locator, also known as maidenhead locator system.
[ Hits: 487 | Votes: 0 | Rating: 0 ]
- The Raspberry OscilloPhone
- Use your Smartphone as an Oscilloscope to visialize signals from 150 Hz to 15kHz and as a Signal Generator to generate sinusoidal, square and triangular signals up to 15kHz
[ Hits: 380 | Votes: 0 | Rating: 0 ]
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