EEVblog #553 - Mailbag

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[highvoltagefeathers]

They run the polycarbonate (edges sheilded by a lead mask) through a linear electron accelerator at 8 MeV or so, so that the electrons come screeching to a halt roughly halfway through the block and get stuck in a pocket of charge (up to and over a million volts of potential in there!). They then poke at the surface of the block with a grounded spike and BAM, the charge forms  channels through which they drain from the charged (unmasked) region to the spike.

[casperhito]

A golfer friend of my father got struck by lightning in Florida. He has those scars on his right forearm. The golfer always told the story and the lightning hit his club ran down his body and blew his left cleat off. Just a relevant anticdote.

[CoolDudeClem]

Can't wait for the next Teardown Tuesday!

[TATO]

It's 5am here in Argentina, I only allowed your new videos to send "alert e-mails", so here I am, watching you, as always. You're great Dave, thanks for such an incredible vblog

[Iamcartmanxd]

I saw the ECS tuning box and was SO excited!! I buy stuff from them all the time!

[yuppiehi]

I believe that on the oscilloscope, the "US-CE-C" is the U.S. Army Corps of Engineers. I work for the Corps myself, and see this acronym on a lot of our electronics gear dating back several decades.

[TradieTrev]

Pull the flat crt to bits! What a epic piece of engineering for the day! 

[ForViewingOnly]

Can't wait to see the Sinclair pocket TV teardown! I'm sure that Uncle Clive is a hero to many of us EEVblog viewers. Today's mailbag was up there with one of the best. That little Tektronix scope... ah, what an object of desire.

[frozenelectronics]

Seriously -- next Teardown Tuesday is going be amazing! I really want one of those Tek 213's!

[DanTheAppleMan]

You can create a crude form of a Lichtenberg figure by discharging a static charge to a metal point in the centre of an acrylic sheet, then dusting with toner powder. Patterns of stranded charge are visible. Unfortunately not the figure itself, but at least you don't need a Dynamitron this way...

[skonkfactory]

Lichtenberg figures in polycarbonate or acrylic are usually made by irradiating the plastic with a linear accelerator so that electrons can be trapped inside it;  then they tap it sharply with a pointed conductive probe, causing the electrons to discharge all at once.  There are some videos on YT showing the process, it's visually quite amazing.

[kujawat]

and some lovely bush... lol  Gotta love Dave and the EEVblog...

[daa]

Like the ECS tuning box, nice to see more euro car guys watching.

[wei]

"... and - some lovely bush. Thank you very much!"

priceless...

[yucannthahvitt]

I absolutely have to have one of those little scopes. It's mandatory.

[basecius]

Beware of that DIN 41612 extender cable. If you do it like that with two female IDC connectors, and a male-male straight through gender changer, you'll actually swap the A and C row. Shortcut alert!!!

[beachsandinspector]

Got to love the little CRO, perfect for audio work.

[therealzilch]

As usual, another very entertaining and educational video, Dave: thanks.

At the beginning you say to make sure your address is given as "Australia" and not "Austria".  Having lived for more than thirty years in Vienna, I can tell you that it's a serious problem the other way around.  Twice we've gotten mail from the States six months late with the stamp that it came via Sydney, even though it was clearly addressed to "Vienna, Austria".  Australia gets probably a hundred times as much mail as Austria, so folks, if you write to someone in tiny Austria, make sure you add "Europe" to the address.

cheers from cool Vienna, and keep up the great work!

[PeterBottineau]

Ripped apart an old Tektronix 529 Waveform Monitor last week in true EEVblog fashion. Found some pretty cool bits in there but holy hell am I glad I never had to build circuits on those old ceramics. It's pure chaos trying to make heads or tails of all the circuitry.

[grannysvids]

saw this performed on tv earlier this year. it was an excellent experiment to watch!