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 VHF/UHF SWR meter -Reflectometer

    A SWR meter is a very basic measuring instrument which is used to measure the voltage standing wave ratio (VSWR) in a transmission media. If you are working with radio waves and antenna experiments, this is a must instrument you should have. Its not that complicated to build one and our intention here is to just get the indication of level of VSWR in a particular transmission path.

Slim-Jim Antenna

      Just completed my slim-jim antenna last week. The materials used are 14 SWG copper wire from old electrical cable and some old PVC's and PVC Connectors. I used a 1.9 Meter 1/2" PVC to assemble element and 1'' PVC for covering the element with an PVC end cap on top and an so239 connector at the bottom end to connect the feeder.

      I used a RG 58 feeder cable and a small balun at the antenna feeder end. And here it is at my roof top. The calculation for element length can be found in google. Do consider a parasitic effect due to PVC and build the antenna with a tuning frequency slightly greater than the required tuning frequency.

Balun for 145.000 MHz.

Cheers !!! ...