INAC AX330 Magnetische loop antenne van 3 - 30 Mhz

I.v.m. de afmetingen van 130x 115 x 33 cm van de verpakking is het beter om een afhaalafspraak op te vragen.

The AX-330 is a double magnetic loop antenna for portable or stationary use, with a size of 110 x 130cm. The tuning range covers the amateur radio bands from 80m to 10m. Finally a loop antenna for regular power levels and for the entire shortwave (except 160m). The exact tuning range is given with 3.4 to 30.5 MHz. The efficiency of magnetic loops is comparable good for small antennas, the manufacturer claims a gain of -0.2 to -7.6dB, depending on the band.

The AX-330 consists of two coupled magnetic loops, one inside the other. Both loops are tuned remotely and at the same time. Only one coaxial feed line and one controller cable is required. So you can use the entire shortwave range (except 160m) with one antenna, without switching different antennas.

The supplied controller LAC-1 allows for a fast and easy tuning of the antenna. Tuning from one end of the band to the other takes about three seconds, fine tuning is possible with 5 kHz accuracy. Optionally the LAC-2 controller is offered, please see below. Tuning is done with the usual procedure for magnetic loops: you tune for maximum noise during reception, then transmit with low power and tune for minimum SWR. The position of the capacitor is deliberately not quite symmetrical, because thsi results in a more pronounced directional behaviour and different elevation angles in different directions, making the antenna more flexible to use.

The size of the outer loop is 110 x 96cm, size overall is 110 x 130cm. The weight is 10.5kg. The antenna comes with a 32cm long mast stub, 40mm diameter. The installation height above ground is not critical, the antenna can be operated without losses approx. 2 to 3m above ground. This allows the use of the antenna for example in a base made for a parasol. When installed stationary the antenna should be installed on a solid metal mast. As with all magnetic loop antennas the proximity of metal constructions can influence the tuning ability of the antenna. The INAC loop AX-330 is designed for a maximum transmit power of 100 to 180W (depending on the band).

Included in shipment is a 3 wire control cable, 5m long. Larger distances between controller and antenna are easily possible. The manufactuer suggests to use standard 3-wire installation cable. Up to 20m distance a cross section of 0.5mm² is sufficient, for larger distances a cross section of 1.5mm² is suggested. The control cable needs to be connected to the antenna and controller before use.