Ordering guide:

Option 1 (No connecting cable): Loop antenna, as shown in the figure, without connecting cable;
Option 2 (With 3.5mm cable): loop antenna + 5m 3.5 connector cable;
Option 3 (With SMA cable): loop antenna + 5m SMA connector cable;
Option 4 (With BNC cable): Loop antenna + 5m BNC connector cable;
Option 5 (With silver plated): Loop antenna + 5m silver-plated cable (3.5mm/SMA/BNC connector is optional, please place an order or leave a message to customer service, otherwise 3.5mm connector will be sent by default)!

Use 50 ohms and 1.5 cables.

The line loss measured in the spectrum analyzer for the 15-meter black cable is about 3 to 4DB. The silver-plated connection wire test is about 2-3DB. It seems that the line loss of the radio frequency wireless is very small, and the line of 5 meters length is basically negligible. Unlike the line loss of 2.4G and 5G wireless frequencies, some of them will have a line loss of several DB in one meter.

The line loss advantage of the silver-plated cable is not obvious, but the toughness and firmness of the silver-plated cable are very obvious. Don’t brag about the product, to be honest, players can buy it by themselves.

Cost-effective shortwave active loop antenna.

Shipping list:

1. A finished board
2. Loop antenna x 1. (304 steel wire, steel wire Φ2.0mm, loop vibrator diameter Φ60cm)
3.Plastic cable tie (used to fix the battery)

Product Description:

The power supply line of the battery adopts perforation design, which is more firm and not easy to break the thread. There are lifting holes on the top and bottom, which is more convenient for both upside down and formal installation.

Delivery list: a finished antenna board, a stainless steel wire ring with a thickness of 2mm and a diameter of 60cm (the stainless steel wire has the advantages of high hardness and not easy to rust. The hardness of the stainless steel wire is too high, and the labor cost for making the ring is too high) . The power feeding effect is the same as iron wire and copper wire in the spectrum analyzer.

The spectrum analyzer test has a gain of about 20DB for shortwave. The gain of the Tecsun S2000 test machine is above 80db. The chip uses a 14-jaw chip and a 9v square battery.

This antenna is suitable for players with external antenna input ports, radios, receivers and SDR players, and is mainly used for shortwave.

The spectrum analyzer has been tested before shipment, but because everyone’s listening environment is different, the quality and quantity of radio stations that can be listened to are different. The environment comes first, the antenna comes second, and the radio equipment comes third!

Note: This antenna is not waterproof.