1. Do not charge your phones overnight as the devices only need approximately two hours to be fully charged.
2. Do not use iPad/tablet charger for your phones and vice versa as the current level that goes through the chargers are different.
3. Don’t charge your phones in a car as the voltage fluctuates as you press the petrol pedal.
4. Once a month, allow the battery to drain below 20%, charge it up fully to 100% and leave it for 2 hours. This trickle charge will ensure it reaches full charge status
There is calculator for building magnetic loop antenna. Try this calculator, to see hows the performance before making you own magnetic loop...
CW ataupun Continuous Wave SSB ataupun Single Side Band CW SSB