Vintage Chart Recorder Wired into Synthesiser's - Bruel & Kjaer 2304

this #historical #scientific chart recorder by bruel and kjaer wired to #synthesizers.
sound pack on this and loads of regular extra content and stuff available here, for the cost of a coffee or what not! :-
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Always looking for old gear! to mod or conserve in the "museum of everything else" one day
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[@LOOKMUMNOCOMPUTER]

Regular content, and also a sound pack (amongst many) from the recorder in this vid available here! www.patreon.com/posts/49315168 Plugging Synths Into XY Plotters :- kzbin.info/www/bejne/iKWWm5-Jhpx4Z7s alsao MrcaliforniaD kzbin.info/www/bejne/d160eoSEjN6Sfc0

[@aurora3655]

You're girlfriend must miss you like f.

[@butsukete1806]

"I didn't pay enuff for this, let me give you more" Much respect, bro.

[@Djdelev]

He's a solid man for doing that 👌

[@derkeksinator17]

I think this is just good etiquette among hobbyists for weird stuff, I had this happen to me as seller twice and I did the same as buyer once so far. Usually I just don't get that lucky though.

[@Hainbach]

Ah that was lovely. Mine is half-broken, but it does amazing rhythm sounds when piezoed. One trick: find one of the measurement elements, a vibration pickup, and put it on the unit itself. That will make it feedback into itself and rattle away. Wouter can Veldhoven told me that particular nugget of fun with these.

[@Blurberrybrown]

Hello, I am Hainbach.

[@shannoneldridge5690]

Your music is officially on the Charts!

[@medicman4444]

you are an absolute legend for the giving that seller that extra dad collected lots of stuff like this years ago on ebay so often he get 99p items and jut pay postage for massive boxes

[@LOOKMUMNOCOMPUTER]

aaah yeah it had to be done ha, does your dad have any left for sale?

[@medicman4444]

@@LOOKMUMNOCOMPUTER id have to rummage around their might be something

[@charstringetje]

A complete lack of interpunction and uppercase. I must ask: On what device have you sent this message? A nicked German Enigma?

[@LOOKMUMNOCOMPUTER]

@@charstringetje lol since when has pointing out lack of punctuation been a thing on subject matters about engineering and technical thingies? most people who dabble in this stuff (me included) dont have the strongest grasp on grammar.

[@medicman4444]

@@charstringetje voice to text engine are quite useless for grammar

[@MrJohnn100]

Genuinely can't wait to visit the Museum of Everything Else one day :D

[@kaydot6889]

Such a fucking good dude giving them more money because he felt they didn't get enough. Guys like LMNC are very rare and it's sad.

[@bugradio]

8:00 - it's cool that we can see which speeds were used the most over the recorder's life b/c of the marks that are on the big drive gear

[@d42kn355]

Oi Sam you should seriously take like 3 or 4 inch snippets of the paper from these recordings, sign em and sell em to us Patreon Members. :D I know I would LOVE one!!

[@chrisbullock613]

yessss

[@idj20]

I love it how you release a new video on a Sunday evening, especially as I'm sitting down full of roast dinner. Cool, informative and interesting.

[@anesthetized7053]

duuude that window to view the gears is an amazing feature. i wish that sort of thing was more common.

[@matthiastilly5480]

Hey Sam, look out for "Graphtec Neo Inkless" paper - it is sold in 100m rolls - maybe not in the exact dimensions you need, but maybe it is possible to cut the width and build some kind of roller-thingy that punches the holes

[@AndrewAHayes]

This was built when things were made to last!

[@andersgenell1306]

Per Brüel worked at Chalmers University in Gothenburg, Sweden for a few years and their acoustics department has a few prototype things, in addition to the ordinary items of course. The connecting shaft between the level recorder and the other equipment (like for sweeping a tone generator) was actually a long thin spring with quadratic massive end pieces, allowing for slight disalignment. I’m sure they have all the equipment still in storage. I don’t know if there is carbon paper, but there should be plenty of ordinary paper for the 2405. There were also paper disks that turned around an axis on the right hand side of the printer used for directivity measurements synchronized with a measurement turning table where the source was placed.

[@gooneybird808]

so god damn cool...so often do engineers and their mechanical marvels go unnoticed. I will visit this dope ass museum as soon as I can.

[@MrRoskoPeko]

The construction of these things Bruel and Kjaer test machines is seriously impressive.

[@K-Effect]

What a beautiful piece. I have seen this type of equipment used in a old railroad instructional movie. It was being used to record the bumps/imperfections in the railroad track so they knew where to inspect or repair the worn out railroad track

[@AlexKivikoski]

Idea: attach a pickup over the writing head and see what kind of noises come out. And for the real fun, plug it back to the input for some crazy feedback loops.

[@jameshamaker9321]

I love it, how he uses a screwdriver as a pointer, is like how another youtuber, uses a trowel, as a microphone for a part of their videos. I do remember, seeing contact paper tape, for sale on either Amazon or eBay. It's called, printer tape and the company that makes it, is somewhere in Sheffield or Enfield, it's a relatively small town in the Cambridge area outside of Oxford. I'm not sure what the name of the company is or if it's still open.

[@daneguitarist1]

Carbon paper is heavily used in basically every restaurant, i dont know if there is a factory that sells what you need specifically but perhaps you can adjust some carbon paper You are an inspiration Sam, keep being your amazing self, you truly are making the world a better place in this weird time we are living

[@caldera99]

Arent they using thermo paper?

[@agarceran]

@@caldera99 Yup, at least everywhere I know of... but fun fact, you can "write" on it by aplying pressure fast with a bit of plastic or even your nails.

[@daneguitarist1]

@@caldera99 i dont know, just on carbon paper its just a press, and there isnt any heat or anything, and it looked that way

[@caldera99]

@@agarceran i used my bus tickets that where printed on it to "test" if the hot plate in my chem classes was still "hot" Fun times

[@nolansykinsley3734]

Judging by the fluff distributed during usage I believe the current write head not only applies pressure, but actually scrapes a layer off of the specialized paper. Looking through an old short form catalog it appears it is white waxed coated black paper. I am not sure the stylus would be applying the right pressure to get carbon paper to work, and even if it did the appearance would be substandard. I would probably look into modifying the write head to use an ink plotter and get some normal paper specially cut into rolls which shouldn't be too much of an issue.

[@comeradecoyote]

A chart recorder that’s easier to come by, but a little more fussy to wire for this sort of thing, is a Leeds Northrop micromax or voltmax, or speedomax recorder. The 1930’s/40’s ones have a beefy AC motor, as well as a dedicated tube amp. Because these were used in a lot of power plants and scientific applications, paper is abundant for them (though not always in the right scale). They usually used a red ink plotter pen. But they’re chunky heavy lads, and usually purpose built, so the range of voltage scales is usually fixed unless you fashion something to boost to the levels they used for that specific model.

[@bricelory9534]

If nothing else, this would be an excellent visual projected for a show

[@jodyjohnson265]

Theses old machines are really cool to look at 😎

[@gerritmarskamp8030]

Hello, by searching in google with the words; b&k short form catalog 1973, a pdf shows up and on page 31, it shows the exact recording paper for the type 2304. In rolls of 60 meters, white paper for ink writing and....... white waxed black paper for stylus writing QP2351 and frequency calibrated 10Hz-32 kHz QP3615 and various others i guess it is one of the waxed varieties

[@calumnichols]

The exact product number should help with the search definitely

[@calumnichols]

In fact ebay threw up rolls that fit almost immediately, though quite expensive for paper

[@LOOKMUMNOCOMPUTER]

Indeed it's the wax but finding it is tough some on eBay but doesn't look the same eek

[@LOOKMUMNOCOMPUTER]

Which ones? I hadn't found the same wax ones

[@LOOKMUMNOCOMPUTER]

Some in France but for a different model that's all I found. Looking up it was slightly different

[@OK-st9st]

Let’s start by taking the top off ;)

[@RazumMusic]

Didn't realise he loved synthesisers THAT much...

[@NicStage]

A museum is a *reason* to acquire things, not an "excuse", imo. You're getting people interested in technology and exploring it!

[@LOOKMUMNOCOMPUTER]

Haha fair point language is the boundary ha.

[@vectorjoe]

Modify it to use film stock instead of paper and attach an LED to the pen ^^

[@mikegeary8056]

I just watched a video yesterday on X and Y recorders. Similar idea. It has a plotter and it uses control voltages out of the box. Really cool. I’ve been thinking of all the stuff to do with it. It doesn’t have a spool of paper the paper is fixed.

[@jeffseven2194]

Awesome,a great find, we'll all be looking for chart paper now

[@leslieschramm6252]

There's a few eight packs of paper on eBay in France , works out at about £120 a pack of eight. Pus P+p and duty charges.

[@ironspike171]

What about low power LASER L A Z E R (pew pew), a mirror where the „pen“ used to be and thermal paper?

[@drumnotdrum9262]

That’s the next vid sorted! Circuit bend this bad boy. He had better get in touch with styropyro!

[@leyetnin1]

You are the Best rampant hoarder!!

[@jasonphilbrook4332]

It's like a storage oscilloscope on a really slow sweep speed. Need to wire up some tape heads or guitar pickups to the magnets on that thing.

[@AndrewAHayes]

Get perforating those betting slips! LOL

[@Eazy-V]

_Bruel_ ? Like _Patrick_ ? Mindblowing video, again ! Thank you !

[@fer_fdi]

a piece of beauty! thanks for showing

[@AnonyDave]

Never ceases to amaze me what some engineers managed to do in the era before modern semiconductors. Almost completely passive components and a few tubes *insert brain exploding here* However I'm ever so glad for the modern stuff, electromecanical can just end up as a nightmare of things wearing out that causes some of the weirdest issues imaginable along with literal rube goldberg machines of complexity (yeah, I know transistors can also be super complicated, but unless someone has really gone out of their way to make an obtuse design, it's mostly parts that can be easily replaced with modern-er alternatives).

[@McTroyd]

Really cool! If it's not possible to locate the original pressure paper, maybe a reel of carbon paper for a calculator could be retrofit? You'd need to build a jig to punch the holes... 🤷‍♂️

[@kschleic9053]

Feed the spool across the bed of a low cost small area laser cutter, cutting one pair of holes then moving the paper a single hole spacing to the next.

[@STAY-GOLD-VINYL]

America needs a Look Mum Museum

[@DarkMetaOFFICIAL]

my mind was blown in the first 5 sec. intro. Blown. lmao i had an idea like this, but to use encephelegram data (ECG) to produce control voltages 😂😂🔥🔥🔥

[@toddspeck9415]

That was fun to watch.

[@DesignedbyWill2084]

I miss those old wooden cases. I always wanted to make a computer like that.

[@codebeat4192]

Maybe you can use carbon/graphite paper in a special designed custom made loop. Such paper is used in a "Magna Doodle" draw toy from the 80s. Search on wikipedia for a description. A drawing can be made by pressing on the paper and the drawing can be erased by sliding a slider to 'reset' the paper. You can perform a reset at the beginning of the loop before the 'printer head' so you can use it endless like a screen. This way the machine can run an endless demonstration. Could be fun, right? And no waste of paper.

[@Guruc13]

God this is beautifully designed

[@nullbyt]

I'd love to visit this museum sometime oof so many beautiful pieces of machinery

[@mitchahbw]

ace, thanks for the insights! 😍 they're beautiful inside!

[@kabood777]

Sam, thank you this was a great video, this made me think if it can be used in a graphic notation art project, I think not only it can be done but with just a little measurement and testing this might be the best tool for it! I wonder if someone has done that before 🤔🤔🤔

[@danielcarlsson615]

What a great looking machine. I love it. Not from China in 2021 with plastic and bad electronics.

[@coryballs]

this is amazing! great breakdown of it's mechanisms :D

[@Dubtee]

You're one of my favorite creators. I've been getting into these projects and DUDE! Your schematics and stuff are amazing resources. I'd really like to hear your ideas for what to do with a big collection of horn speakers (I have too many) you think I could make an organ?

[@digitaldobbie]

I like your ethics Sam. Good man!

[@zetaconvex1987]

I admire your enthusiasm, creativity and knowledge. I am expecting you to achieve great things, young man. It would be good to see your perpetual clock during the intro to your vids from time-to-time.

[@johncoxy1]

And those levers! It’s like clockwork

[@mitchahbw]

I guess in a way it integrates the input waveforms if it moves with changes to voltage (integration turns a U {y=x^2} curve into a straight line)

[@vistabuntuu]

11:20 nearly shredded my eardrums. Please drop the volume if that sound is in future videos

[@yatexasnycaflnvnigga]

No one can’t beat you

[@johnruschulte2593]

Does that paper have a technical name or designation that is referred to as in the manual this might help in tracking it down?

[@joeyvanrenesse884]

If somebody needs help regarding this, contact me! We run a business that is fully concentrated on chart recorders.

[@sludgemind9024]

Daaaamn, good stuff, as usual! About that paper, if you can't find you might be able to make it from those carbon paper sheets and regular paper, cut, stick strips together and roll. Or change the dull pressure point with a pen and use regular paper rolls?

[@pentachronic]

Just get some pencil leads and make a collar to go over the tip. It's spring loaded so an H or 2H lead would probably work well. With a roll of paper you're golden.

[@hifi.david.]

So cool

[@michaelgmoser7845]

Wow Sam ! Or (Mr Tesla)?!😁 order yesterday my first DIY Kitt! I will see 🙄? I hope i'm able to handle this 🤔! Tata! Keep healthy !? Sorry for my englisch ! 👋for your GREAT Job!!!!!!

[@michaelgmoser7845]

Haahaaa Furby !!!

[@pentachronic]

Having an output from the solenoid potentiometer could be used as a Control Voltage to and VCF etc. A very nice machine though and in good condition.

[@johncoxy1]

Some very nice wiring in there. Hope you find more paper reels!

[@Veptis]

You might find paper like this meant for cash registers. But there are still analog seismographs, so it won't be impossible to find graphing paper rolls

[@dykodesigns]

That paper reminds me of carbon copy paper, they kind of which 3 sheets are stacked together and when you write on the top one the you’re also writing on two sheets below. I wonder if this roll of graph paper uses a similar approach. Maybe it uses carbon particles.

[@mCKENIC]

Wonderful!!! Thanks for sharing!

[@Veptis]

This green paint is anti rust and it's used for bike track markings between Germany and Netherlands.

[@Dynamighteee]

Aw man that's just awesome

[@jhonviel7381]

bro those gears!!!!

[@superpie0000]

siesmographs are no longer used with paper as far as i know so i dont know where to get it but i do work with them. also now i wanna see if the geophones on the newer ones have analog outputs. i could sample siesmic movement of construction.

[@Quietus118]

Now we need to build a reader that can use the paper as an input!

[@ZOOTSUITBEATNICK1]

An absolute knockout!

[@thesloppyapprentice2528]

So cool I don't have to buy this stuff to take a peek inside, excellent channel PS: If this thing could write on toilet paper it would be a super nice 2020 lockdown memorabilia

[@VAXHeadroom]

I'm thinking make a (removable) add-on to the stylus, a linear pot so you can show the output of this machine on an oscilloscope. Not as cool as the paper, but no consumables :) Also: for the output connecting shafts, if you can draw up what the connector looks like it could be 3D printed...

[@properjob2311]

You should pickup an Electro-Mechanical Pinball machine they are amazing engineering and no computer used

[@jnyis]

Thought you might have made one with a few motors and an etch a sketch 😂

[@robinovvelociraptor809]

Have you seen the way audio was optically recorded on film that could be cool to see

[@tomahzo]

There's got to be a YT channel or some people somewhere in the world who knows this gear in detail ;). What if there are service/design engineers from B&K still alive that you could interview about this stuff? It's a pretty amazing rabbit hole to go down into ;D.

[@SuperMrHolland]

Brüel & Kjær is still in business. Maybe that can help you find spare parts and paper.

[@LOOKMUMNOCOMPUTER]

Sadly they do not have much of theold stuff about

[@Coloneljesus]

11:05 man I wish you recorded tracks that sound this raw..

[@aksela6912]

I bet CouriousMarc would love one of these

[@gthippie]

Can you please take some of the drawings from the machine and make some merch. Would be awesome to wear one of your tracks!

[@MADKIWI]

And the only roll I have is now gone. Great fun m8, I hope a subbie can help with more rolls.

[@sammerritt730]

Does anybody know if the surplus paint used was originally for the undersides of aircraft

[@PandaKattPk]

Much LuV Sam

[@uriahgarcia3329]

Idk if you'll see this but I'd really like to know if it's possible to feed live audio from a a synth into a computer modem and have it match the frequency of said note and play it

[@7thrx]

You're going to flex so hard on antiques roadshow especially when you don't auction it.

[@RadiantFeline]

Oh god. At 10:50 I caught myself mewing along with the song.

[@TobiasSample]

Holy shit, did you draw a furby on that plotter using a goddamn theremin?

[@TheIN4CER]

What if you put a touch screen where the the paper ream was and have it record the movements electronically? Sam.

[@baronvonbasscat]

nice find stay funky bro

[@caglarkorun]

YOU SHOULD USE IT AS A SPEAKER. That writing cylinder is basically a speaker with a pin attached. What if you attach a diaphragm to the pin ?? Eh!? :)

[@LOOKMUMNOCOMPUTER]

I mean it acts as a speaker even without a diaphragm

[@chloedevereaux1801]

that paint was used on the undersides of fighter aircraft and bombers....... :D

[@LOOKMUMNOCOMPUTER]

Yep that makes sense I guess Western front aircraft on the axis were mostly either this green or blue. Not so much the eastern front where Denmark is so I wonder.how that stuff ended up there.maybe just general aviation industry around those parts

[@jirioto6089]

i love these quantum continuous converters, what about BT-100 printer? called "frightened nail"? :D

[@pegroj]

You could heat the tip of the "pen" and use thermal paper

[@LOOKMUMNOCOMPUTER]

ha it did cross my mind but sheesh the faff haha directly below is a metal plate which would make an awfully good heatsink spoiling the fun, but yeah! :D

[@pegroj]

@@LOOKMUMNOCOMPUTER if you scratch hard enough, the thermal paper will be writen too. Make a test with a piece of thermal and your nail

[@TRIPPLEJAY00]

Oh dude what a lovely bit of kit makes me want to follow in your footsteps. Unfortunately I'm a minimalist, Well trying to get part with stuff I don't use lol.

[@patrickbodine1300]

Awesome mate!

[@ultramet]

What next? Lie detector polygraph test and instant electronica hit. Bloody genius right here.

[@TobiasSample]

Not sure how useful this is for you, but often receipts are printed on something like that paper but instead of scratching the paper, the needle is heated up a bit. If there was a way to make that needle heated a bit, you might be able to use that paper. It might be quite a modification though D:

[@geordie7269]

I found some new old stock roles of paper on ebay dont think it would be worth the money to buy and use up though

[@AnalogDude_]

hopefully you're are right!