skema antena radio amatir meter band
Pada band MF dan HF, biasanya kita gunakan polarisasi horizontal sedangkan untuk VHF (pada radio 2 meteran) biasa digunakan polarisasi vertikal. Kita tahu bahwa pancaran VHF tidak menggunakan pantulan ionosphere
Meidi hobi sekali membuat radio. Dia ajak saya ikut JOTA. Kalau tidak salah pas kelas 2. Akhirnya, kami bisa membuat radio 11 meter band. antena dipasang di rumah Tegal Panggung. Dan, memancarlah kami dari rumah
Ultra-compact Multi-band Wire Antenna. Published on August 27, 2013 in Amateur radio and radio Antennas. 0ments. Live in an area that prohibits Figure-1 is a diagram of the antenna. image. Figure-1. Cheap & Easy multi-band antenna diagram. sep_thumb.jpg However, the increase in inductance poses no noticeable problem because only the first couple of coil turns are used for tuning above the 40 meter band. NOTE: Take a look at the article by VK1OD on tapping an
Published on September 29, 2013 in Amateur radio and radio Antennas. 1ment. The W3EDP multi-band HF wire antenna is popular among QRP enthusiasts because it is light weight and cheap. It is also Figure-2. Diagram of Phase I antenna. PHASE II. Phase II consisted of modifying the Phase I antenna to provide continuously variable counterpoise lengths, adjusting the counterpoise lengths for the (80 – 6 meter bands), and recording the SWR measurements taken with my
Published on October 17, 2011 in Amateur radio, amateur radio aids and radio Antennas. 0ments. Need an inexpensive easy to constructpact 40 meter wire antenna that will fit in a 20 feet by 20 feet space? One that can be squeezed into a suitably sized attic? The antenna requires a good tuner, provides a useable SWR curve over most of the 40 meter band (7.0 MHz – 7.3 MHz), and has a good radiation pattern and gain at a height of 25 feet. A 1:1 current balun is needed
He selected an L2 value of 6.5′ for the 20 meter band. According to the March 1936 QST article, W3EDP worked 75 countries in all continents within a two year period using his antenna with 50 watts input to the final P.A.
According to the ZS6BKW design, the length of the matching section is electrically .62 wavelength (WL) for the 20 meter band. Since 14.2 MHz is near the midpoint of the 20 meter band, we will use it to calculate the initial
Phase I – Antenna Modeling. I selected a simple form of the bowtie antenna for modeling purposes. Figure-1 shows the target bowtie configuration. bowtie-diagram. Figure-1. 40 meter bowtie antenna configuration. How long should the radiators (L) be and how far apart (W) . shows the measured SWR curve after the antenna was tuned. Notice the measured SWR curve is lower than the model predicted SWR curve and is relatively flat across the 40 meter band.
- Halaman ini diberdayakan oleh Google dan Bing! -