🎛️📊⚡

#vintage electronics #vacuum tube amp #oscilloscope #test equipment #analog meter #hifi audio #knobs and dials #powered device

⭕️↗️💨

#speed dial #gauge meter #increasing speed #speed indicator #analog meter #speed needle

⚡️➡️📏

#galvanometer #current measurement #electric meter #analog meter #ammeter

📟⚡️↗️

#galvanometer #analog meter #needle gauge #current reading #electrical measurement #detector