MLA-T PRO v.6
The new MLA-T PRO v.6 replaces a well-known model of magnetic loop antennas – MLA-T PRO v.4, with approximately 100 units sold during the last years.
The new MLA-T PRO v.6 replaces a well-known model of magnetic loop antennas – MLA-T PRO v.4, with approximately 100 units sold during the last years. The MLA-T PRO is a commercial magnetic loop antenna that was used and enjoyed by many HAMs. During the production period, the MLA-T PRO antenna was upgraded several times. The common advantage of all MLA-Ts is that with a relatively small diameter of the four loops, at only 0.8 m, the antenna also works on the 160 m band. Although the efficiency at a low antenna diameter to lambda ratio is not ideal on the 160 m band, the robust construction, the use of copper tubes and high voltage capacitors allows you to use the full power of 100 W, which most HF TRXs have. Because of this, the lower efficiency of the MLA-T PRO at 160 m is partially compensated. The external design of the MLA-T PRO v.6 remains identical to the MLA-T PRO v.4 model, the internals of the antenna are upgraded.
The main advantage of the new MLA-T PRO v.6 is the addition of a new usable band – 30 m band, and new tuning motor, that allows the use of rechargeable battery pack to power the CB4M control unit. Thanks to the use of rechargeable battery back we eliminated interference of "unknown origin" caused by most wall plugs. The previously used linear power supplies with a transformer were gradually pushed out of the market by smaller and cheaper adapters (switching power supplies), which bring new unpleasant phenomenon to the HF – QRM. Reduction of QRM when using AKU pack can be heard immediately.
MLA-T is for indoor usable with maximum power of 10W. For higher powers than 10W don't use it as indoor antenna ! Even there is no proof of negative effect of high frequency radiation at this power level you should avoid exposure of long time exposure. At 100W is minimal recomended distance of operator from antenna at least 5m. Don't touch antenna while it is powered by high frequency power to avoid injury or death. Using of MLA antennas can cause EMC problems because standard electonic shielding (without ferromagnetic material) are not effective agaist magnetic part of field. MLA-T is not suitable for persons with heart pacemaker.
Caution: High frequency magnetic field passes through walls with low loss!