It’s #sensorsunday 🤩

A field strength meter can be really handy when testing antennas and they’re simple to build: a couple germanium diodes, a capacitor, a good old analog uA meter and a potentiometer to adjust the sensitivity.

This unit was just $20 and it seems they repurposed a PCB originally intended for some other application 🤷🏼‍♂️ 🙂

To use it, start by adjusting the sensitivity to its minimum setting, key the transmitter at its lowest power (1W will certainly do) and walk along the antenna and measure the field strength along the wire or structure.

I’ll do a future post demonstrating it on a trap dipole , W3DZZ style 🙂

#hamradio #hamr #antennas #antennaengineering #rfengineer #testandmeasurement