Lucky me! 😃

Came across this beauty, mint condition, at a price which left little debate 🤌🏼🤩

I finally have a calibrated horn antenna 🥲

#rfengineering #hamradio #testandmeasurement #testgeartuesday

A friend gave me this Vintage #WaveTek ‘Model 19’ 2MHz function and sweep generator - it’s beautiful inside and seems to work just fine.

I can’t find a servicemanual or the schematics - even the regular user manual seems to have vanished in time..
Let me know if you find one somewhere 👌🏼🙂

I don’t plan to keep this, I’ll pass it on, but it’s fun to see old gear come to life like that 🥰

#rfengineer #functiongenerator #electronics #testandmeasurement #testgeartuesday #waveformwednesday #hamradio #hamr

What a score - genuine EPPLEY voltage cell, originally used for calibration purposes.

Even though it’s 66 years old, it still seems to work, it’s amazing 🤩

Stay tuned for a more thorough test under more controlled climatic conditions 👍🏼

#vintage #testandmeasurement #electronicsengineering #electronics #engineer #hamradio #testgeartuesday

Preparing a little curve tracer demo, walking my way through some different diodes 🙂

Starting from the left, an OA95 germanium, 1N4148, 1N4007, LEDs, a vintage 60V Selenium and finally, a zener.

#electronics #testgeartuesday #rohdeschwarz #electronicsengineering #testandmeasurement #hamradio #hamr

It’s #testgeartuesday and here’s a fun and easy all-time classic antenna experiment: measuring the near field strength across a half-wave dipole 👍🏼😎

Cut a dipole for a suitable frequency, say, 145MHz. If you have a small VNA, use it to verify the center frequency.

Now, feed the dipole at the center frequency with an external generator, here a vintage classic: the #marconi 2022 🥹 Output power was set to 10dBm, that’s 10mW, more than enough. Don’t worry about walls and reflections, it’s the near field we’re interested in.

Carefully moving the field strength meter across the dipole, from one end to the other, will show the voltage curve: maximum at the ends, zero at the feed point.

Such a simple experiment - demonstrating such a fundamental antenna behavior 😃😃

#hamradio #hamr #antennaengineering #rfengineer #electronics #testandmeasurement

Ordered a couple of cheap BNC high-power attenuators, 3 and 6dB. “DC-3GHz” is a bit optimistic, but I found them nice and flat up to 1GHz, which is way above the frequency area of my application.

So what’s going on here? 🤷🏼‍♂️☺️ Stay tuned, hints are in the tags 👌🏻

#hamr #hamradio #sota #qrp #cwops #portableops #siglent #testgeartuesday #rfengineer #testandmeasurement #rfengineering

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