K-30WLA active broadband receiving antenna pre-HF LPF low-pass filter (limited to medium wave and short wave use), larger diameter and higher gain, suitable for receiving radios with sufficient dynamics and professional receivers for medium wave/short wave broadcast reception It is also suitable for the reception of communication modes such as SSB CW FT8 in the amateur shortwave band.

K-30WLA is a medium/short wave version active loop broadband receiving antenna originally designed by me. The P.BOX feed box has a built-in 3.7V 18650 flat-head lithium battery and integrates a power supply module without an external power supply. In addition to the charging management chip, the MICRO USB charging port is used, and it is very convenient to use the 5V charging head for charging. It adopts high-frequency low-noise preamplifier and pre-HF LPF low-pass filter. The gain flatness is good within the operating frequency range of 0.1-30MHZ, providing about 25DB gain. The receiving frequency covers long-wave, medium-wave, and short-wave bands. The diameter of the small ring is 68CM, which is easy to install. It can be installed outside windows, balconies, terraces, and roofs. It is very suitable for HAMs with limited space and broadcasting enthusiasts. All the screws of the antenna are made of 304 stainless steel, and the pre-amp box is a fully waterproof structure, which can be erected for long-term outdoor use in wind and rain. It is suitable for short-wave professional receivers such as Desheng S-2000 PL-990 ICOM R71E YAESU FRG-8800, and is very suitable for short-wave reception of SDR receivers.

Notice:

The antenna comes with a dual SMA male adapter cable, SMA to 3.5 male adapter cable and S2000 BNC adapter, which means your radio can be used with SMA female, BNC seat and 3.5 jack without having to buy additional accessories. Receivers and radios with other interfaces should be equipped with adapters (a small bottle of PVC glue should be provided when installing the antenna). For those who are not familiar with the interface type, please consult first.

The antenna consists of a ring vibrator (304 stainless steel) and a radio frequency. BOX preamplifier box, one P.BOX feed box, two P.BOX retaining clips and screws (304 stainless steel), one dual SMA male adapter cable (one meter long, 96 layers of densest shielding), One SMA male to 3.5 male adapter cable (one meter long, 96 layers of densest shielding), one micro USB 2A charging cable (one meter long) TNC male and SMA male 50-1.5 feeder (10 meters Long, 96 woven most dense shielding mesh), two antenna mounts and fixing clips (304 stainless steel material). Three PVC mounting brackets, two straight butt fittings and a pipe cap were given as a gift

The following are physical photos of K-30WLA:

A complete set of accessories:

K-30WLA antenna installation method diagram: