It’s #signalsaturday and here’s a mystery SW signal I picked up at my friends place 😃

5-15s bursts, centered at about 1.5MHz, total bandwidth 2MHz. Starts with carriers 4kHz apart, then spreads out to a noise field, which then goes back to single carriers.

Mostly present weekdays, signal is ‘local’ ie not observed on SDRs further away. No apparent timing of the bursts, occurrence seems ‘random’.

Either it’s 1) alien 👽 (joke) or 2) Some communications channel or 3) some kind of VFD 🤷🏼‍♂️
#hamradio #rfengineering #rfengineer #thetruthisoutthere

Inspired by a Twitter dialogue, let’s launch some daily #electronics tags to be used freely 👍🏼🤓

Today is #waveformwednesday and here’s how my mains grid looks - not quite a sine but that’s to be expected.

Don’t ever, EVER, connect your scope input directly to mains - use a high voltage differential probe or a transformer, as shown here.

I’m using the #quicktest switch, it’s a really handy way to control power to a circuit. It’s of British origin and comes with a standard 13A BS1362 fuse. I found that a bit high for my purposes, so I replaced it with a 5A, significantly limiting the available energy in case of a fault situation. Safety first always applies at the bench 👍🏼⚡️☝🏻

So go ahead, use these tags freely, be inspired and show us your experiments 👌🏻🙂

#electronics #rohdeschwarz #micsig #electronicsengineering #engineer #hamradio #measurementmonday #testgeartuesday #waveformwednesday #teardownthursday #frequencyfriday #signalsaturday #sensorsunday