Blog penjualan/Pembuatan antena HF ,VHF dan antena lainya pelengkap radio komunikasi (HAM)
This indoor FM antenna greatly improves FM stereo reception. Its inexpensive and easy to build.
2 meter halo antenna project by mike fedler with many detailed pictues and detailes homebrewing instructions so you can build your own. Listed under the Antennas/Halo category that is about Halo Antenna.
The above dimensions for the J-pole are in inches, and aren’t typical for a 440 mHz. J-pole antenna. This is what it took for me to get the SWR low. Measurements on overall length, and stub length are from the centerline of the separation pipe (horizontal) to the top of the antenna. The Connect at
The above dimensions for the J-pole are in inches, and aren’t typical for a 440 mHz. J-pole antenna. This is what it took for me to get the SWR low. Measurements on overall length, and stub length are from the centerline of the separation pipe (horizontal) to the top of the antenna. The Connect at
Tired of paying for cable? Build a HDTV antenna and stop paying for cable. This HDTV antenna build gives me a 75 mile range - Page 6
NVIS antennas are great for short hop communications on bands such as 40 or 80 meters. This is a quick and easy DIY NVIS antenna AKA Cloud Burner antenna - Page 2
antennas for the low bands plans and pictures of 80m and 160m antennas both for transmission and reception built by ei7ba. Listed under the Antennas/160M category that is about Antenna for 160 meters band.
A new trend in Antenna modeling software is to build Antennas that are resonant! What do you say? Well in the early days of amateur radio nearly everything was matched by either, a gamma match, beta match, hairpin match, 75 ohm 1/4 wave coax match, or one of a few hundred other home made matching devices. With the advent of modern computer software, it was discovered that Yagi's, Quad's, and other normally non-resonant antennas could be matched to 50 ohm coax, by changing the sizes and the spacing of the elements. The above photo on the left shows how many Yagi's looked for 50 years, it was generally assumed that Yagi's were just low impedance antennas and had to be matched with some type of aiding device. The above photo on the right shows how many Yagi's are being built today, and that they are perfectly happy with a 50 ohm coax running directly to it, as long as you do install a choke at that point. The choke could be a Current Balun (preferred) or a bunch of Ferrite beads running on the outside of the coax for some length until the coax meets the mast at least. I know what some of you are thinking balanced to unbalanced, blah blah blah....... NO. Balanced to Unbalanced means there will probably be common mode current trying to run back down the coax...hence the choke. Even with balanced single element dipoles there is current that will attempt to run back down the coax, so you should have a choke in any case. On all antennas. The exception being on some raised end-fed verticals which actually need the coax to better balance the antenna electrically and give the antenna some ground path. see: A99 and Imax2000. The terms balanced and unbalanced are used frequently and vaguely in amateur radio on many websites, sometimes being used in completely different uses then described here. That's a long discussion in itself. But trust me ...you need a Choke regardless of your thoughts on balanced versus unbalanced.
NOAA Satellite Signals With a PVC QFH Antenna and Laptop : This instructable covers everything you'll need to get started in being able to receive the APT (Automatic Picture Transmission) signals from the NOAA Satellites (NOAA-15, 18, and 19) flying overhead (and can be a foundation for listening to other s…
HF wire antennas are not hard to understand when explained in simple terms as they are in these ham radio books and e-Books.
Tired of paying for cable? Build a HDTV antenna and stop paying for cable. This HDTV antenna build gives me a 75 mile range - Page 5
When you first get your license, 2 meters is usually the first band you get on. Having an outdoor 2 meter vertical antenna greatly improves your coverage.
Tired of paying for cable? Build a HDTV antenna and stop paying for cable. This HDTV antenna build gives me a 75 mile range - Page 7
Quarter Wave Dual Band VHF/UHF Ham Radio Antenna by Asni Nor Rizwan: A Simple & Cheap Dual band antenna will save you having two different antennas for UHF and VHF
When you first get your license, 2 meters is usually the first band you get on. Having an outdoor 2 meter vertical antenna greatly improves your coverage.
When you first get your license, 2 meters is usually the first band you get on. Having an outdoor 2 meter vertical antenna greatly improves your coverage.
When you first get your license, 2 meters is usually the first band you get on. Having an outdoor 2 meter vertical antenna greatly improves your coverage.
If you are a hacker, you might consider ham radio operators as innovative. Most people, however, just see them as cheap. So it is no surprise that hams like [jmharvey] will build an antenna analyzer f...
Tired of paying for cable? Build a HDTV antenna and stop paying for cable. This HDTV antenna build gives me a 75 mile range - Page 4
Tired of paying for cable? Build a HDTV antenna and stop paying for cable. This HDTV antenna build gives me a 75 mile range - Page 7
