Geerling Engineering

Fun experiments, thoughtful guides. All things tech, electronics, and computing!

[Jeff Geerling @geerlingguy]

Can you receive FM radio on a 3D printer's heatbed?

@repkord asked, and we tested, with some assistance from my Dad, a radio engineer!

The answer is yes, and a video is here: https://t.co/6tIZNNSFer

[Geerling Engineering @GeerlingEng]

OTA TV has a rocky road ahead: ATSC3 has a massive chicken-and-egg problem. Will the FCC mandate it in new TVs? Will DRM kill it?

That, and everything else we saw and discussed at NAB 2026, in today's video: https://t.co/cyjWbZ0DSY

[Geerling Engineering @GeerlingEng]

@Davesjoshin Right now probably not, but it's something we've enjoyed researching in the past!

Tons of microwave towers still in use today (many of the AM/FM towers have microwave dishes off the sides for different relays)

[Geerling Engineering @GeerlingEng]

We saved our old iMac with @Juicy_Crumb's Docklite — a replacement for the iMac motherboard to give (at least some) old iMacs new life!

New video is live, on YouTube: https://t.co/N4mrhcxJCf

[Jeff Geerling @geerlingguy]

The movie 'Fall' has a radio tower in it. Don't let a radio engineer see it 🫣 https://t.co/z2zxbWTIKN

[Geerling Engineering @GeerlingEng]

Take an extensive behind-the-scenes tour of a digital SMPTE 2110 production truck at a @StLouisBlues hockey game in today's video: https://t.co/9VO2lpcfpp

[Geerling Engineering @GeerlingEng]

Thanks to @wlanpi for shipping a couple of their WLAN Pi Go units for testing — a CM4-based mobile WiFi analysis tool. Here's our take on it: https://t.co/E02UXmmgog

[Jeff Geerling @geerlingguy]

Over on @GeerlingEng, I got a 40+ year veteran radio engineer to review WSQK, the fictional radio station in @Stranger_Things season 5. Video here: https://t.co/xHiYqSYif6

[Jeff Geerling @geerlingguy]

Don't climb a tower to see the lights!

[Jeff Geerling @geerlingguy]

As always, huge thanks to first responders—and in this case, to the tower climbers who were busy doing their job, maintaining the KSDK tower.

I don't think "saving a guy's life by restraining him for an hour 800' in the air" is in the job description, but he did it anyway

[Jeff Geerling @geerlingguy]

It's always a good morning when you're picking up some early b-roll of towers for a new @GeerlingEng video...

[Jeff Geerling @geerlingguy]

Just before heading off to #VCFMW, my Dad and I got the Apple II working! I just wanted to show his neat little workshop in a video, and we wound up plugging in the old recapped PSU, and... well, here's what happened: https://t.co/6J97dTNm9i

[Geerling Engineering @GeerlingEng]

How's that 1979 Apple II restoration going?

Well... for every problem we fix, another one rears its ugly head. And we now have a Mysterious Ticking Noise! https://t.co/jNZa1Rmc6b

[Jeff Geerling @geerlingguy]

My Dad and I discussed our top 10 favorite things we saw at @OpenSauceLive last weekend on @GeerlingEng: https://t.co/vLYzDbw31n

[Jeff Geerling @geerlingguy]

SDR is an incredible tool for understanding radio https://t.co/6v4Yzu9SlQ with @hydrasdr on @GeerlingEng

[Jeff Geerling @geerlingguy]

I did not die installing a GPS antenna at the studio with my Dad... and I got to learn some of the tricks of the trade with coax and antennas for permanent outdoor installs from him! https://t.co/H6qHFc7ec5

[Jeff Geerling @geerlingguy]

46 years later, just in time for the end of #AprilApples, I gave my Dad his first computer—and Apple ][ he and his brother bought in 1979: https://t.co/r7ovpPKFNT

[Jeff Geerling @geerlingguy]

What would *you* build in a mini rack? My Dad and I are heading to NAB and will talk about our most recent mini rack builds at an Ennes workshop on Saturday! We've learned a lot, and are excited for the future of the mini lab—for radio, homelab, etc. https://t.co/M5vUmcAfs0

[Geerling Engineering @GeerlingEng]

Delete! Delete! Delete! The FCC asked what regulations should be deleted from its books. Is it good for broadcast radio? Bad for hams? What would we delete?

Today's video: https://t.co/B4UdcyJz6K

[Geerling Engineering @GeerlingEng]

Automakers spent nearly $30 million dollars fighting against an AM radio mandate, but the US government seems ready to pass it. Here's a quick overview of the situation: https://t.co/36VMU7stQw