EEVblog

[@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.

[@edwardLongman]

Great detailed answer, fascinating!

[@djsndcx]

yeah, thanx

[@tubalcain1]

highvoltagefeathers Not Polycarbonate... This is PMMA... PolyMethylMethacrylate.. AKA,, Acrylic or Lucite. Very common within the plastic fabricators field. This can be done with small pieces such as yours or can be done in very large blocks. I have several of these that I picked up at a salvage yard.

[@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.

[@TATO10892]

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

[@CoolDudeClem]

Can't wait for the next Teardown Tuesday!

[@simonsieber5779]

same i cant wait

[@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.

[@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...

[@TradieTrev]

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

[@frozenelectronics]

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

[@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.

[@JustinAlexanderBell]

Came here to say this, they're very cool.

[@wei249]

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

[@kujawat]

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

[@grannysvids]

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

[@simoncrabb]

That little oscilloscope is lovely!

[@beachsandinspector]

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

[@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!!!

[@daa3417]

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

[@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!

[@rubusroo68]

I love that scope, can't wait for the teardown!

[@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.

[@kjetilv]

That was a epic looking scope.I imagine your lab will look more like a old science museum soon :-P

[@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.

[@sc0tte1-416]

There was probably a ground plate shaped like a square that was smaller than the plastic, I'm surprised the main branch didn't just go straight through though

[@Polaventris]

So many cool teardown items! Can't wait! Honestly I can, but still...

[@sandmanxo]

I didn't realize you watched this channel too, always entertaining.

[@LiquidPortalDigital]

That Sony Extender board is for the Sony BVW series professional VTRs (BetacamSP).

[@yucannthahvitt]

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

[@Doom2pro]

Those Lichtenberg figures work like a light pipe btw, shine an LED through the contact point and the entire thing should illuminate.

[@AureliusR]

Another amazing video Dave! Thanks! I wish i had a Tek 213. About 350 on ebay with shipping :(

[@DJSolitone]

Wow such a cool little vintage scope !! Perfect mailbag !! But I need to send you a proper knife for parcel opening...

[@MrSparker95]

Wow what an awesome oscilloscope!

[@johngriffus2031]

Just a suggestion, try an led on the edge of the poly carb sculpture, I bet it would look great!

[@jonathanmadison12]

Holy shit, 9:27 does that say Camas, Washington? That's where I am from, REALLY small town!

[@frollard]

15:00 the lichtenberg figures are from bombarding the acrylic with an electron beam with phenomenal energy...building up MASSIVE static electric charge, then they tap it with a grounded point letting an explosive discharge of the static buildup escape at once, superheating the acrylic and turning it white.

[@sjheiss]

Cool, Washington! I've never heard of Camas (some town by the Oregon border apparently) but I live near Seattle. :)

[@ZollyMonsta]

Hey.. When are you doing the teardown on the Sinclair TV? That looks seriously retro and cool!

[@cogsinister100]

That baby scope is the coolest thing ever !!!!

[@beou1980]

Hey Dave!! About the camera zoom issue, why don't you make a foot-pedal zoom switch???

[@redtails]

19:41 aw it's so adorable..

[@AzureFlash]

This mailbag was amazing

[@Mythricia1988]

That tiny little Tek scope was the most beautiful little thing...... I want one. I mean, I only have 3 vintage Oscilloscopes already, surely I need more? >_>

[@catdumpling]

found this video that does a great job of showing the process of creating Lichtenberg figures. the music's a little cheesy, but otherwise it's pretty cool! (also make sure you _don't_ have captioning turned off because they go into a lot of detail about the process.) Making "Captured Lightning" (Mllion-volt Sculptures)

[@casperhito]

Awesome video as always. A bit cheeky about the unicycle rider seat "projections". Made me spit my tea. Being a person who can ride a unicycle that would take all the fun out of it. Imagine trying to hop a curb on that bad boy.... Can't wait for the teardown of that mini TV.

[@redtails]

23:26 Well there you have it

[@bgdwiepp]

That scopemeters screen looks so crisp!!

[@TheOriginalEviltech]

The lichtenburg is iradiated with high energy electron radiation from a linear accelerator and then every mechanical touch or bump causes the stored energy to disapate on the branches.

[@JaredReabow]

those figures are held in a high voltage clamp connected to a lighting generator (massive cap) a nail with a conductor cable is hit into the block and the shock causes massive electrical discharge, there can be small arc even a month after being made as the material shifts

[@skonkfactory]

No, they are made with a linac.

[@JaredReabow]

skonkfactory no they are not made in a linac! before you comment, research fool!, You know the BBC, that small british tv company...ahem , they have a science show where the apparatus described was used to make the figure www.rsc.org/chemistryworld/2013/11/georg-lichtenberg-figure-electrostatic-printing

[@skonkfactory]

Jared Reabow That's a completely different process (using treated paper).

[@mausball]

The Tek 200 series were cute, but I love my Tek 336s. 50MHz DSO with cursors and GPIB, in a tiny little portable size. Cobranded with Sony, for the CRT I think, they're triumphs of miniaturization for that era.

[@whayden001]

Some real goodies there Dave, can't wait for those Tuesdays to come up. I'm hoping you can get at Sinclair to work.

[@ZXRulezzz]

Sony extender cards are probably from some studio video equipment, maybe like a quad VTR, time base corrector, etc IMHO

[@samrustan]

Oh that scope is beauty!!

[@CookingWithCows]

last setting of the oscilloscope: -_-

[@mspysu79]

The sony extender cards look like they are for a BVW-75 Betacam SP VTR. Very cool little scope/dmm

[@cybermaus]

Use your desoldering gun to rework the half-size connector on the full-size traces on that sony board. Probably better then trying to separate those traces.

[@jtb2586]

5:13 7 years later and the old bat is still alive and kicking

[@bensthingsthoughts]

That oscilloscope is absolutely enormous. Unfortunately not optimized for your shelves :)

[@ratbag359]

Wow I enjoyed this mail bag very much ;)

[@FennecTECH]

WHERE is the scope meter teardown

[@Tehsusenoh]

Wow, that's probably the neatest scopes I've seen.

[@BAMBAM5476]

I have seen the lichtenberg figures In the ground after a lichting strike it where glass tubes that folwed the path of the current

[@VinnyBE]

Hi Dave, first i would like to thank you for your interesting videos! I was wondering why the Sony and Roth extender cards were so large( in length) doesn’t that cause a lot of extra resistance and unwanted capacitance between the lines? Or were they used for purposes that needed such a lengthy connection? Thx a lot for your answer!

[@leadfootlawnmower2762]

were are the teardown videos. is there a second or 3rd channel. someone please tell me

[@paulhoward4161]

You should consider sending some coin the way of the chap who contributed the DMM/Scope!

[@Max_Marz]

Dave are you familiar with the geek group? They have been experimenting with making fulgurites in sand with 150~ KVA. Neat stuff.

[@technodaz]

Dave, Ever put a CD/DVD in a microwave on full for around 5 seconds , perfectly safe way to make a similar sculpture and looks amazing. If you have not done it , do it.

[@edherdman9973]

I bet those EX-151 extender boards were related to Betacam in some way.

[@TheLambLive]

25:36 It looks sad. :-( (Great vid)

[@WreckDiver99]

That cable also looks like the VME Cable.

[@redtails]

6:47 Anyone watching the EEVblog should get out more... the painful truth

[@Manofcube]

One company I saw that makes those Lichtenberg figures charges them up with a Linear particle accelerator and then discharges them with a hammer and nail.

[@coldlikechips]

I tried to get out once, the places were nice, the people were dissapointing.

[@0671018]

Gooled Lichtenberg figures and found the following: Creating a huge 2 million volt two-layer Captured Lightning sculpture!

[@Llyod3000]

wow got amazed when he pressed the Rm button :D

[@1961willard]

How much you want for it Dave?

[@oriole8789]

At 20:27 Dave proves that certain gear can give cute puppies a run for their money. ;)

[@tuccerHU]

I can't wait until Tuesday...... :D Excellent videos! Keep up the good work. Cheers from Hungary

[@MrTapechild123]

I really want that Tektonix 213 DMM Analog Oscilloscope... Ugghh I'm jealous

[@freman]

I could so see one of those figures with a rgb led behind it...

[@nihonam]

I WANT such a DMM scope!!!

[@IIGrayfoxII]

Dont take it apart, it is too good.

[@dasilvaleandro21]

Thats the Lichtenberg figure in the polycarbonate.

[@lizerdlips2]

that Tektronix 213 oscilloscope reminds me of a pit boy from the fall out games

[@robot797]

i wish i had that little tektronix it would be verry handy in my portable test box

[@xDaimstarX]

20:31 Oscillogasm :D

[@glenwoofit]

That scope is a bobby dazzler!

[@morelenmir]

I saw a video of these discharge things being made here on youtube. You charge up a block of perspex with - in that particular video's case - a radiotherapy machine and then incredibly carefully bring in an earth wire to let it discharge. Scary, but fun.

[@johndoe-gr3mj]

I want to buy a Gossen and Fluke multitester because I want to treat myself to the best. Which is way I watch EEVBlog. I had to write several emails to locate and price the Gossen "Energy". I called Fluke to ask about the 87V IMPROVED but I got voicemail. Digi Key said that they would email me if they had the 87V IMPROVED multitester. I await that email with newfound ardor. Dave, you are god, no doubt about it.

[@petersage5157]

0:48 Dave was naked for this part. It helps him focus on the content.

[@10xxi]

Todd Johnson creating Lichtenberg figure at lunchtime at Fer

[@drdos4]

I wonder how nice of a light pipe that lichtenberg figure would make? Just drill a hole at the scar and insert an LED!

[@t3du]

Oh Ghez 11:10 The president of Lichtenberg is the Prof Garrison from South Park is trying to sell us again his invention,

[@MrRobinhalligan]

Have a look at this dave showes how the figures are done Making "Captured Lightning" (Mllion-volt Sculptures)

[@jasonrodda98]

hahahahaha the qween is going to croak (now id pay to see that lmao)

[@MrTeneric]

good explanation! typically this is done during the last days of a linacs life. A radiation therapy machine is capable of producing electron beams of varied potentials. As a dielectric (poly) is bombarded the electrons pile up and create a truly tremendous potential. When grounded you see (sensible) symmetrical discharge pattern. Most therapy physicists have one or two of these. They don't come cheap.

[@makeupbygloria]

make it into a necklace that would look cool

[@jeromekerngarcia]

Hey Dave; "Of course it still works, it's a Tek from the 70's, when they were still made in the US!" :-) :-) :-)

[@donttrytoclick]

Hi Dave, please make another power supply video :)

[@Q8Police777]

Hey dave, this is an awesome video aswell showing the Lichtenberg figure in wood. 15 000 Volts!! 15 000 Volts - Melanie Hoff

[@DavidAmmerlaan]

Giggle at "lovely bush"

[@ronineter1]

There is one item that i would want to send to you, a HIOKI Micro HiCORDER 8202(With two termal rolls). but i cant send it due that i live on the other side of the world and sending it is way to expensive for me.

[@KillrogEVE]

9:19 :)