<div dir="ltr"><p class="MsoNormal"><b><span style="font-size:15pt;font-family:Helvetica,sans-serif;color:rgb(69,66,69)"><a href="http://www.cqdx.ru/ham/new-equipment/10-40-meter-coaxial-alpha-loop/" title="10-40 Meter Coaxial Alpha Loop"><span style="color:rgb(68,68,68)">10-40 Meter
Coaxial Alpha Loop </span></a></span></b></p>
<p class="MsoNormal" align="right" style="text-align:right"><br></p>
<p style="text-align:justify"><a href="http://www.cqdx.ru/ham/wp-content/uploads/2015/10/Alpha_Coaxial_Loop_Antenna.jpg"><span style="font-size:10pt;font-family:Helvetica,sans-serif"></span></a><span style="font-size:10pt;font-family:Helvetica,sans-serif;color:rgb(68,68,68)"></span></p>
<p style="text-align:justify"><span style="font-size:10pt;font-family:Helvetica,sans-serif;color:rgb(68,68,68)">The 3+ foot high and wide Coaxial Alpha Loop Antenna is perfect
for those operating Condo, SOTA, Beach, RADAR, or any place you need a High-Q
directional HF antenna with low noise capabilities designed into the system.
The LMR-400 based element of the Alpha Loop offers you a light antenna in a
small package, which deploys in 60 seconds!</span></p>
<p style="text-align:justify"><span style="font-size:10pt;font-family:Helvetica,sans-serif;color:rgb(68,68,68)">The Coaxial Alpha Loop Antenna is uniquely mountable on the
included tripod, providing you with the greatest ease of deployment, use, and
effective efficiency ever made available. We are always advancing our antenna
systems, so starting 9/28/15, this antenna will now come with the built-in SWR
Indicator!</span></p>
<p style="text-align:justify"><span style="font-size:10pt;font-family:Helvetica,sans-serif;color:rgb(68,68,68)">TUNING<br>
Here is a video presentation on how to tune the 10-40 meter Coaxial Alpha Loop
Antenna<br>
<br>
</span></p>
<p style="text-align:justify"><span style="font-size:10pt;font-family:Helvetica,sans-serif;color:rgb(68,68,68)">SWR demonstration from 10-40 meters:<br>
Here is a video presentation of another way to tune the Alpha Coaxial Loop
Antenna:</span></p>
<p style="text-align:justify">
<span style="font-size:10pt;font-family:Helvetica,sans-serif;color:rgb(68,68,68)">Included:<br>
Outer Loop with Continuous frequency coverage from 7 to 29.7 MHz made of
LMR-400 that is 100% Made In The U.S.A. using crimped & soldered Silver
Plated PL-259s, which is the same technique used to build MIL-SPEC connections
for the U.S. Military<br>
Maximum Power – 12 watts PEP SSB<br>
Duffel Bag dimensions in inches – 12″x12″x3.5″<br>
Feedline – 50 ohm Ultra RG58/u coax with BNC connector on coax<br>
Adapter – BNC female to PL-259<br>
Mount – Integrated 3/8×24 bolt & 1/4×20 nut that is milled in the U.S.A.<br>
Tripod – 3 feet Silver plated SO-239s are milled and formed 100% in the U.S.A.<br>
High-voltage boxes are of a high quality and are 100% Made In The U.S.A.<br>
The Variable Air Capacitor is made of raw materials from and assembled in the
U.S.A.<br>
All other parts, even the black plastic knob used to tune and the solder is
from the U.S.A.</span></p>
<p style="text-align:justify"><span style="font-size:10pt;font-family:Helvetica,sans-serif;color:rgb(68,68,68)">Weight: Antenna (1.8 pounds,) Tripod (1 pound), & Canvas
Duffle bag (.8 pounds)</span></p>
<p style="text-align:justify"><span style="font-size:10pt;font-family:Helvetica,sans-serif;color:rgb(68,68,68)">STANDARD<br>
Assembles and dissembles from the included field bag in 60 seconds. As this
antenna is a loop, there are no taps on coils and no counterpoise wires needed.
Has a built in tuner that allows you to easily match the antenna for transmit
and receive from 7 to 29.7 MHz (40 Meters through 10 Meters). High noise
rejection is also one of the favorite features of this antenna for many
operators in RFI prone environments. Includes a coax feed line with BNC Connector
plus BNC to PL-259 adapter.</span></p>
<p style="text-align:justify"><span style="font-size:10pt;font-family:Helvetica,sans-serif;color:rgb(68,68,68)">HOW DOES IT WORK?<br>
The Coaxial Alpha Loop Antenna appears as a large resonant circuit to your
transceiver. The loop is a large single turn inductor of the circuit. Due to
the large size of the inductor, radiation of your signal very easily takes
place.</span></p>
<p style="text-align:justify"><span style="font-size:10pt;font-family:Helvetica,sans-serif;color:rgb(68,68,68)">INCREASED EFFICIENCY<br>
To increase overall ERP, the variable air capacitor is placed inside the loop.
Doing this captures the power from the variable air capacitor inside the loop,
where the power that would normally be lost to ground can be recycled. Other
designs place the capacitor below the loop where losses would be radiated on
the outside of the loop toward the ground.</span></p>
<p style="text-align:justify"><span style="font-size:10pt;font-family:Helvetica,sans-serif;color:rgb(68,68,68)">Better coupling is the result of the Coaxial Alpha Loop Antenna
using a shielded coupling loop. Where return-loss (VNA parameter S11) increases
rapidly when the distance is increased from 0 to 2-3 cm (1″), then becomes flat
with further increase in distance. Over the initial distance increase, the
shielded coupling loops had about 6 dB less return-loss, i.e., better coupling.
Additionally, shielded coupling loops had slightly better SWR than the
unshielded coupling loops. bullet </span></p>
<p style="text-align:justify"><span style="font-size:10pt;font-family:Helvetica,sans-serif;color:rgb(68,68,68)"><a href="https://amateurradiostore.com/" target="_blank">Link</a></span></p>
<p style="text-align:justify"><span style="font-size:10pt;font-family:Helvetica,sans-serif;color:rgb(68,68,68)">Price: $299.00 USD</span></p><p style="text-align:justify"><br></p><p style="text-align:justify">Fonte: <span style="font-weight:bold;color:rgb(106,106,106);line-height:18.2px">Sparky</span><span style="color:rgb(84,84,84);line-height:18.2px">\'s World of Amateur Radio. </span></p></div>