AS-SAL-30 Mark II - Shared Apex Loop Array. Shared Apex Loop Array, 34 ft aluminium mast and wire
SKU Part Number: AS-SAL-30
Due to dimensions of shipping the price reflects an element of shipping from USA.  Shared Apex Loop Receive Antenna System. Eight...
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£1,438.96 £1,199.13
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Due to dimensions of shipping the price reflects an element of shipping from USA. 

Shared Apex Loop Receive Antenna System. Eight instantaneous switching directions. Anchoring Stakes, ropes, tensioners, mast, mast base, cable loops, combiner, controller and 15 V DC power supply, 34 ft high. 33 ft radius (36 ft square if posts are used to anchor loops' outer corners). NOW VERSION 2 WITH ALUMINUM MAST.

Introducing the Shared Apex Loop Array™ - Mark II

Now, you have a new interference fighting weapon in your receiving arsenal. The Shared Apex Loop ArrayTM is a revolutionary receiving antenna that will change the way that you listen to the radio! The patented design provides performance in a size and over a range of frequencies that will please both the rag-chewer and DX’er alike.

The antenna is a true-time-delay array with four identical wire loops supported by a single non-conductive mast. Signals from each loop are transferred through a ferrite coupler to a short balanced line that connects to the switch/combiner/amp enclosure mounted at the base of the antenna. Within this enclosure, signals from each loop are routed either directly to a combiner or through a delay line and then to the combiner, where they are amplified by a dual stage balanced broadband amplifier and sent out to the feed line to the controller located in the shack. The controller connects directly to your receiver, and sends power and control signals over the feed line to the antenna.

Three models to chose from

  • AS-SAL-30 - optimized for VLF, BCB, 160 m / 80 m / 40 m DXing, 32 ft tall,  approximately 47 ft square footprint
  • AS-SAL-20 - optimized  for VLF, BCB, Low Band DXing, and shortwave to 15 MHz, 24 foot tall and approximately 36 ft square footprint.
  • AS-SAL-12- optimized for BCB, and 3-30 MHz , 16 feet tall, and approximately 26 ft square footprint

 

Shared Apex Loop Antenna, AS-SAL-xx Mark II, mast composition for the different models.

 

"Shared Apex Loop Array: A Wideband Directional Receiving Antenna for 500 kHz - 30 MHz"

Effective communication on the LW, MW, and SW bands requires more than just a careful ear. You need the right gear to navigate through the jungle of interference that can be as close as your computer, or as distant as a thunderstorm on the other side of the globe. Interference, though isn't just a challenge for DXers - it's a challenge for net operators, rag chewers and county hunters too, military operations - in other words, it is a challenge to all of us!

We have developed a new type of receiving antenna that delivers exceptional directivity in a small package and is usable over a wide range of frequencies without need for adjustment. This new antenna is called the Shared Apex Loop Array antenna and it opens the door to a new class of compact, high performance, wideband receiving antennas developed for both amateur and professional users.

The antenna operates on the true-time-delay principle rather than the more traditional phased array methods. This method of operation enables outstanding bandwidth. For example, a 23 foot tall, 18 foot radius array, like the SAL-20, can provide outstanding front-to-side and good front-to-back performance for continuous frequency coverage below 500 kHz to 16 MHz with good sensitivity above 1.8 MHz! A 10 foot tall, ten foot radius array provides continuous frequency coverage between 500 kHz to 22 MHz with good sensitivity above 5 MHz.

The patented and additional patent pending designs provides the following benefits:

  • Compact Size, light weight
  • Wideband operation without need for adjustment
  • Ground independent operation
  • Outstanding front-to-side ratio
  • Ease of Construction, and simple single feed line control for data and RF
  • Modular design
  • Portability for DX-peditions, quick deploy operations, field day operations, emergency operations
  • Easily remote controlled with the Shacklan - 4 USB interface to your PC or a Ethernet Everywhere device.

 

If you want to save on shipping costs and please check our AS-SAL-30 Mark II DX , the overseas version, no mast, no power supply, click here. There is a link on guidelines for building your own mast.
 

Components



Combiner view at bottom of mast. The two lower connectors are for the delay line (provided) and the top one is for the feedline.
White cables are the twin lines coming from the couplers. 
 
Combiner Features:
  • Four balanced loop inputs
  • Operating Range: 100 kHz - 30 MHz
  • Group Delay Matching (+/- 1 nsec) between ports from 1 - 20 MHz
  • Very low noise dual differential pre-amp (open socket design)
  • Now delivered with a High Pass AM Broadcast Band Filter, older models can be upgraded easily.  and more gain too.
  • Delay Line Ports 75 ohm (F-type connectors)
  • Single Feed line to Controller F-type. Power/Data/Signal shared on single cable  
 
 
 
Controller frontal and rear views.
 
Controller Features
  • Eight direction rotation either direction
  • Flip for instantly for rotating 180 degrees and seeing the front/back ratio
  • Bi-directional to beam in two directions at once
  • Single 75 ohm feed line operation, no control cable
  • Controllable from the 4 wire ShackLan interface for remote operation from your PC or a USB/Ethernet direct box
  • Compact in size, 4" (101.6 mm) wide x 5" (127 mm) deep x 2" (50.8 mm) tall
 
Pattern
Performance Videos
 
 
 
 
 
 
 
 
 
 
 

Shipping:

We have several shipping options for our products, including next-day and Saturday/Sunday delivery for certain items. Please see these options at checkout.

Returns:

If you have any equipment that needs to be returned to Martin Lynch & Sons, please fill out the form below:

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Upon receipt of goods you have 14 days to return goods however the goods must be returned in original packaging and care must have been taken with the goods you wish to return. Under distance selling regulations you are not entitled to any refund on carriage charges or modification charges made at your request.

Warranty Terms and Conditions

Outside of the 14 faulty return period, returned items cannot be accepted, unless covered by manufacturer's warranty. We will repair as much as possible on site however in exceptional circumstances products may have to be returned to the manufacturer of distributor.

For repairs/replacements under manufacturer’s warranty for any item please download a ML&S return form from the link below and return to ML&S with the faulty product.

International Warranty information

Warranty service for items we sell is available in the U.K. only, unless otherwise noted. It is your responsibility to pay freight for returned items to the U.K. and back to you for desired warranty coverage. All of our NEW products come with a minimum 12 month warranty, (Yaesu & Icom 24 months), with up to 90 days on second-hand equipment. Items returned for service must state "returned goods for repair" on the return air waybill or U.K. import customs duties apply and will be added to your invoice. For more info about returning items please contact our customer help desk, sales@hamradio.co.uk