filmov
tv
Don's 2 Meter Extreme Dream Beam Antenna

Показать описание
Building the ultimate 2 meter ham radio beam antenna with local parts. Estimated at (12.5 dbd ) this video shows how to build it and the parts you will need, and analyzer performance stats for frequency and swr. UPDATED VIDEO ON OUR CHANNEL NOW.
SEVEN ELEMENT 14.5 dbd* MODEL. CHECK OUR CHANNEL.
Much has changed in the last 3 years on the materials and plans
From the bend to bend of each piece of copper, this is the measurements of the elements. Using any other screws can effect the frequency. From U to U or to the bends where you attach the screws are listed. The distance between the bends.
Please understand you must cut the wire longer to achieve this and your bending needs to be like the video shows. It is not super critical except for the driven element, but we wanted to be clear.
Distance inside the bends is shown below.
QRZ MEMBERS ONLY- SEE A DETAILED DESIGN WITH ALL THE LATEST FEATURES OF THIS PERFECTED DESIGN.
U----------------82 1/2"-----------------U Reflector
U------------78 5/8"-----------U DE
U------------74"-----------U Dir 1
U---------72"-------U Dir 2
U------70"------U Dir 3
2" of exposed unshielded rg8 or 213, 50 ohm coax to attach.- This is critical. Using smaller coax is unwise on 2 meter and will change the length needed of the unshielded coax for a perfect match. If you did use smaller coax you would peal back more shield, but it will exceed the coax guard and performance is lost in the feed line.
If you can test frequency resonance that is recommended but if the distance inside the bends matches, you will be very close to perfect resonance for 2 meters.
SEVEN ELEMENT 14.5 dbd* MODEL. CHECK OUR CHANNEL.
Much has changed in the last 3 years on the materials and plans
From the bend to bend of each piece of copper, this is the measurements of the elements. Using any other screws can effect the frequency. From U to U or to the bends where you attach the screws are listed. The distance between the bends.
Please understand you must cut the wire longer to achieve this and your bending needs to be like the video shows. It is not super critical except for the driven element, but we wanted to be clear.
Distance inside the bends is shown below.
QRZ MEMBERS ONLY- SEE A DETAILED DESIGN WITH ALL THE LATEST FEATURES OF THIS PERFECTED DESIGN.
U----------------82 1/2"-----------------U Reflector
U------------78 5/8"-----------U DE
U------------74"-----------U Dir 1
U---------72"-------U Dir 2
U------70"------U Dir 3
2" of exposed unshielded rg8 or 213, 50 ohm coax to attach.- This is critical. Using smaller coax is unwise on 2 meter and will change the length needed of the unshielded coax for a perfect match. If you did use smaller coax you would peal back more shield, but it will exceed the coax guard and performance is lost in the feed line.
If you can test frequency resonance that is recommended but if the distance inside the bends matches, you will be very close to perfect resonance for 2 meters.
Комментарии