HF VHF RF Power/SWR meter with Oled Display

    Presenting here is a simple Arduino based homebrewed HF/VHF RF power & SWR meter. This compact and light weight equipment which is powered by recycled Nokia BL-5C batteries and entire unit is mounted inside a PVC junction box. A DC power socket is provided to recharge the battery using external power supply as we as an option to power the device using external power supply.

QRP EFHW SOTA TUNER

             This is a mini QRP tuner for EFHW antenna tuner. End Fed Half Wave is a type of dipole antenna of which the feeder point is at one end instead of the traditional dipoles where feeder line is connected to the middle point where the impedance is very low.