Jonathan Bastow
Jonathan Bastow
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PARcans
I try and do a simple video about a simple lighting instrument.
I fail.
Turns out parcans have a more complicated history than one might imagine. I'd like to thank Chip Monck who replied to my e-mail with some information about the early days of the humble parcan.
EDUCATORS - Feel free to use this video in your classroom.
Переглядів: 3 613

Відео

Questions and Answers
Переглядів 841Рік тому
You asked questions - I will attempt to answer them! This video was recorded without a script after midnight because it was the only time I could use the space. (Oh, and I know Fred Foster wasn't the inventor of the Source-4. Blame 30 millennia of information decay.)
Analog and Digital Signals
Переглядів 788Рік тому
In this video we discuss the difference between an analog signal and a digital one. If you'd like to learn more about the Nyquist - Shannon theorem, may I suggest this excellent video by someone with far higher production values than mine: ua-cam.com/video/pWjdWCePgvA/v-deo.html EDUCATORS - Feel free to use this video in your classes! That's why I started making these. Attributions: Harry Nyqui...
Binary numbers, and why you sometimes need to know them for doing lighting.
Переглядів 1,1 тис.2 роки тому
We cover counting in decimal vs counting in binary and how to convert a DMX address to binary and set DIP switches if you happen to find yourself facing a light that still uses them. EDUCATORS - Feel free to use this video in your classes! That's why I started making these. Curta Calculator Image By Larry McElhiney - Created this image in Indianapolis, IN, CC BY-SA 2.5, commons.wikimedia.org/w/...
Balanced Signals
Переглядів 2 тис.2 роки тому
A brief explanation about how balanced signals work. This is mostly an audio thing, but they get used in DMX as well. EDUCATORS - Feel free to use this video in your classes! That's why I started making these.
Lamps, LEDs and Fluorescents
Переглядів 15 тис.4 роки тому
An overview of three main sources of light in the theater and why two of them really don't like being put on a normal dimmer. Since this video was put up I have learned that there are some arc lamp ballasts that have adjustable brightness, but they can't be dimmed out, just adjusted between 100% and ~P. You learn something new every day. EDUCATORS - Feel free to use this video in your classes! ...
Salt Water Dimmers
Переглядів 23 тис.4 роки тому
In this video, we talk about the resistance dimmer's predecessor, the salt water dimmer, which was basically a giant shock hazard that could also dim lights. The diagram is from Theatre Backstage A to Z by Warren Lounsbury. EDUCATORS - Feel free to use this video in your classes! That's why I started making these.
Autotransformer followup - Inductance
Переглядів 4,1 тис.4 роки тому
A followup to the autotransformer video, explaining the cryptic "The secret is inductance." comment. EDUCATORS - Feel free to use this video in your classes! That's why I started making these.
Variable Autotransformers
Переглядів 6 тис.4 роки тому
In this video we talk about variable autotransformers. An older dimming technology, but one that we still use occasionally. EDUCATORS - Feel free to use this video in your classes! That's why I started making these.
Resistance Dimmers
Переглядів 44 тис.4 роки тому
An early and inefficient form of theatrical dimming. EDUCATORS - Feel free to use this video in your classes! That's why I started making these. Special thank you to the Sarah Lawrence College Archives for providing the inspiration and then the pictures. slcarchives/posts/2531490243599659
The Lime Light
Переглядів 251 тис.5 років тому
In this video we demonstrate the reaction that gave us the first spot light, and the phrase "in the lime light". EDUCATORS - Feel free to use this video in your classes! That's why I started making these.

КОМЕНТАРІ

  • @Vinnay94
    @Vinnay94 7 годин тому

    Be careful calling CFLs Soft Serve Cones. I might end up eating them in the middle of the night 🍦 💡

  • @KDLASTER3
    @KDLASTER3 25 днів тому

    The lime in the lime limelight was great.

  • @bigjd2k
    @bigjd2k Місяць тому

    Later on they had an open aluminium reflector with a lampholder riveted to it, and you plugged a 500W halogen lamp straight in. This assembly replaced the PAR lamp completely. Not as good, but cheap and available.

  • @Jacob-my4fj
    @Jacob-my4fj Місяць тому

    PAR46 is not a typo. It's the next size down from GE lighting. Fun fact: locomotive headlights use 75V or 35V PAR56 tungsten-halogen bulbs, and marker (tail) lights use PAR46.

    • @jonathanbastow3538
      @jonathanbastow3538 Місяць тому

      Yeah, I realized that like two days after I uploaded this. Given all the other loopy things with early standards I'm not sure why I was surprised that the lamp was 5 3/4" across.

  • @abbenay2300
    @abbenay2300 Місяць тому

    Man, as a Brit I really appreciate that when you are speaking in UK context you pronounce aluminium correctly. Excellent etiquette.

    • @lcdjr85
      @lcdjr85 Місяць тому

      I find that ironic - the now-American spelling and pronunciation was originally coined by the discoverer (a Brit), but the word was later modified as it didn’t sound fancy enough. You all have a bad habit of doing that! 😊

  • @TheRandomView
    @TheRandomView Місяць тому

    Fantastic. Thank you for this information.

  • @gabrielphillips-sanchez7837
    @gabrielphillips-sanchez7837 Місяць тому

    Dear John, thank you for your contribution to this art with your documentary videos, they are great! Can you please consider a video on DMX, analog, Ethernet and nodes with regards to signal flow? Thank you

  • @musiqtee
    @musiqtee Місяць тому

    Ah, yes… A fixture as old as myself, became the communal staple of our careers in culture work. Every silly story on PAR cans experienced, from the local one-time gig to the crews and artists of greatest worldwide fame. I sometimes wonder - what utility will be a common denominator of future silly stories, experienced in culture work now? Maybe just “money”…? 😅

  • @danielbuck
    @danielbuck Місяць тому

    Another one! Yess! Love your videos, please keep making them :-)

  • @thespi9679
    @thespi9679 Місяць тому

    Why did I find this six hours after I talked about Par cans to my stage electrics class? Looks like I'm going back in for another!

    • @jonathanbastow3538
      @jonathanbastow3538 Місяць тому

      I really should do a shorter one that's just the "how to ID the lenses and use this thing" for when you don't need to spend twenty minutes learning the history of it's creation...

  • @pdrg
    @pdrg Місяць тому

    Does the name Richard Hartman come up at all? Legend had it that he had a hand in introducing them to rock-'n'-roll by his contemporaries

    • @jonathanbastow3538
      @jonathanbastow3538 Місяць тому

      It doesn't, I didn't encounter him during my reading, although I was mostly focused on the very beginning and the ending of the parcan. Any good places to read more about him?

  • @Geovideo333
    @Geovideo333 Місяць тому

    Welcome back. Sorely missed you were.

  • @SuperSparky216
    @SuperSparky216 Місяць тому

    I'll always remember the harmonics of pars on dimmers as they sang to the actors and audience on any kind of fade.

  • @XbotcrusherX
    @XbotcrusherX Місяць тому

    Rock and roll might have created the demand for PAR cans, but i shudder to think of how power infrastructure looked like in the early days of touring shows sucking back ungodly quantities of power. I know we did the usual thing of "stealing from heavy industry" and eventually ended up with things like Soca and cams, but what crazy things did people get up to before we had settled on those?

    • @XbotcrusherX
      @XbotcrusherX Місяць тому

      I should add, I've never used a PAR can to cook.... But I have used an old Altman incandescent scoop light to warm up a box of pizza.

    • @jonathanbastow3538
      @jonathanbastow3538 Місяць тому

      As far as I know - do not have sources for this at hand - in the early days they used either the weird stage plug connectors with the contacts on the outsides (Doc Brown uses one to connect the lighting rod to the Delorean in Back to the Future) or welding connectors known as "Twecos" because Tweco was a major manufacturer of them. They were not a great choice since they had an exposed screw that was live. The story I heard was that the head electrician at Madison Square Gardens was very safety conscious and refused to let them in his venue, which meant that any band that wanted to play there had to upgrade their equipment. The other big push was the 1984 Olympics where an electrical inspector for the city came through, saw the stuff that was being used and basically went "absolutely not" and forced them to upgrade to stuff that didn't require a few wraps of electrical tape to keep you from touching a live screw.

  • @Klodvig105
    @Klodvig105 Місяць тому

    People sometimes toss the words "underrated UA-cam channel" around too casually but this one it really applies to. At least if you are interested in various lighting systems.

  • @Xsiondu
    @Xsiondu Місяць тому

    Ohh yeah! You are my kind of wierd. Instant subscribe. Let's learn about par cans

  • @KORTOKtheSTRONG
    @KORTOKtheSTRONG Місяць тому

    altman be praised

  • @UnitSe7en
    @UnitSe7en Місяць тому

    A 26-minute video on lamps and I'm here for it. _So_ here for it.

  • @gerardhughes
    @gerardhughes Місяць тому

    It's hard for me to even fathom the amount of wattage needed for those giant walls of PAR cans, and the amount of heat they must have given off.

  • @rdbchase
    @rdbchase Місяць тому

    Worms?

    • @jonathanbastow3538
      @jonathanbastow3538 Місяць тому

      What?

    • @rdbchase
      @rdbchase Місяць тому

      @@jonathanbastow3538 You said you have a problem with your brain.

    • @rdbchase
      @rdbchase Місяць тому

      @@jonathanbastow3538 I'll try again; UA-cam's artificial stupidity removes most of my posts, especially those in which I use the forbidden second person pronoun. ___ said ___ have a problem with ____ brain and I inquired regarding the cause.

    • @rdbchase
      @rdbchase Місяць тому

      @@jonathanbastow3538 UA-cam removes my responsive replies. I was responding to the statement at the beginning of this video.

    • @rdbchase
      @rdbchase Місяць тому

      @@jonathanbastow3538 UA-cam will not allow me to make any responsive reply.

  • @rauljvila
    @rauljvila Місяць тому

    Every time I see a Jonathan Bastow video notification and watch it, I'm shocked this channel hasn't blown up yet.

  • @MrBanzoid
    @MrBanzoid Місяць тому

    Just a couple of points from when I used halogen PAR lamps. When the filaments were cold, they had a very low resistance so there was a big current spike if they were suddenly powered up. For that reason it was usual to leave them on at a very low level by using pre-heat on the dimmer racks. Also, when a halogen lamp blew, the hot gas inside the lamp capsule could ionise and flash over causing a dead short, popping the breakers or fuses in the dimmers or worst case the lamp would shatter. Thanks cor the vid. Duly liked and subbed.

  • @codyaimes4354
    @codyaimes4354 Місяць тому

    As an engineer, i fall down the rabbit hole All the time.

  • @jobbarnett81
    @jobbarnett81 Місяць тому

    I just realized that I wasn't subscribed. Subscribed.

  • @quertize
    @quertize Місяць тому

    Welcome back.

  • @Ranger_Kevin
    @Ranger_Kevin Місяць тому

    Not sure why this popped up in my recommendations, but what a nostalgia trip! I used to dabble a bit into show lighting a a hobby in my youth, and bought a set of 8 PAR64 cans to light parties for friends and schoolmates. But since I was a poor student and cheapskate, I just bought a couple of "Raylight reflectors" that allowed you to keep the reflector and just plug a 500W GY9,5 halogen lamp into it. They were utter crap of course and terribly ineficcient, but good enough, lighter and less bulky than the proper PAR-lamps. Good times!

    • @jonathanbastow3538
      @jonathanbastow3538 Місяць тому

      Neat! I didn't remember those, but I have a feeling I've used them before because when I was writing the script I was convinced that the AluPar had replaceable lamps and was very confused when I found out it didn't. I must have been thinking of an instrument like you're describing and gotten it mixed up with the AluPar.

  • @obd6HsN
    @obd6HsN Місяць тому

    13:05 - btw I appreciate the pond-side-appropriate pronunciation of that word, in that context.

  • @obd6HsN
    @obd6HsN Місяць тому

    Well, this has made my day! Never spent any time in Nottingham, I suppose?

    • @jonathanbastow3538
      @jonathanbastow3538 Місяць тому

      I don't think so. My dad's side of the family lived in Harpenden and Worthing, so much farther south.

  • @lily_skye
    @lily_skye Місяць тому

    NEW JONATHAN BASTOW VIDEO!!!!! Let's freakin gooooo!!!

  • @gorak9000
    @gorak9000 Місяць тому

    Something I'd like to know, but haven't found an answer to, is in older theater incandescent lighting, there's 2 different "whites" - a more yellow white, which I'm guessing is halogen, and a much whiter, bluer light. I know now with LEDs it's easy to make whiter / bluer light just by changing the phosphor mix, but what were the whiter white lights in incandescent times? Or, maybe the "yellower" white is regular incandescent, and the whiter white is halogen? It seems really common for general stage illumination to have both, and you tend to see them in any stage / theater setting.

    • @unistrut
      @unistrut Місяць тому

      Was it possibly a carbon arc spotlight? Old follow spots used an electric arc source that was a brilliant blue-white.

    • @gorak9000
      @gorak9000 Місяць тому

      @@unistrut I don't think so - they're just some kind of cans mounted to lighting racks

    • @jonathanbastow3538
      @jonathanbastow3538 Місяць тому

      Were they using a mix of Source-4s and older ellipsoidals?

    • @gorak9000
      @gorak9000 Місяць тому

      @@jonathanbastow3538 I don't know, I"m not a lighting guy, just usually a guy sitting on the stage in an orchestra (or similar), and wondering about how they have 2 different color temperatures of "white". It's been pretty universal at most halls I've been in, and these are not halls that have cutting edge or up to date stuff - think high school auditoriums, or small community event spaces, but up to more professional concert stages / halls as well. I've noticed that for a long time, going back to the late 80's or early 90's, so it's definitely not "new technology" of any kind. I started music lessons and have been on stages since I was 4, but I don't do that professionally - I just play in community orchestras or similar for fun, but I am an EE / COMPE professionally, which is why I notice such things and wonder... usually the 2 color temperatures are all grouped on the same dimmer channels, and they can balance the overall color temperature by changing the balance between the two - but usually whomever is running the lighting desk barely knows that they're doing, and it's just all on, or all off per channel

    • @jonathanbastow3538
      @jonathanbastow3538 Місяць тому

      @@gorak9000 Ah, okay, they may have just been gelled differently. Most lights have a slot in the front to put a colored plastic filter (called a 'gel' for historic reasons) in them and one of the common lighting setups is having warm light coming from one side and cool light coming from the other. That's actually the "Method" in "A Method of Lighting the Stage". It helps make the performers on stage look a bit more three dimensional than just having one color coming from straight ahead.

  • @Rouverius
    @Rouverius Місяць тому

    [Sigh] Look, how many times to I have to say this? It's Puh-kahn!... Oh... um, nvrmnd. Carry on. Carry on. Seriously, you had a great run, PAR cans. You made our fond experiences of music and stage so much brighter.

  • @trashdoctor
    @trashdoctor Місяць тому

    Thank you for the comprehensive look at PARcans! I definitely remember encountering them in my youth - I think for where I used to be they are all replaced with LED Fresnel lamps? (long box- not sure if there's a lens?). Thanks again for the great video.

  • @lwilton
    @lwilton Місяць тому

    Great video! I'm always happy to see something new from you! I always heard ACL pronounced Aircraft Landing Light, when it wasn't just an ACL. I guess that would have made it an ALL, but the roadies I ran with never much thought about that. The admonition you found against "cheap PAR lights not worth their shipping" referred to the PARLiter, and a host of similar knockoffs by mail-order lighting companies of the time. They were at best a Fresnel replacement, but with a truly ugly uneven pattern and uncontrollable spill. The manufacturing quality of many of them was, um, "questionable", which didn't help the lighting guys liking them much. I did summer stock at a theater that had a bunch of the Arial-Davis spotlights. What a nightmare! They were a good 3 feet long and weighed about 50 pounds each. I think they had an auxiliary lens, because you could control the beam angle by sliding the PAR forward and backward in the can. They were an attempt to make a PAR-Leko, but you couldn't get a sharp edge, they weighed a ton, got blazing hot, were almost impossible to adjust, and could be better replaced with a 6" Fresnel with a 500W lamp.

  • @notanimposter
    @notanimposter Місяць тому

    What do you MEAN we don't know what soot is-aaaaand I've been nerd sniped. See you all in a few months o/

    • @jonathanbastow3538
      @jonathanbastow3538 Місяць тому

      I KNOW. I just wanted to know how a candle made light and then I'm reading scientific articles on soot composition.

  • @tlaloclopez-watermann3499
    @tlaloclopez-watermann3499 Місяць тому

    Great video thanks for the info. Did you look into the Svoboda low voltage light bars?

    • @jonathanbastow3538
      @jonathanbastow3538 Місяць тому

      I had not heard of those before! I just did a quick google search but it didn't come up with much - where can I find more about them?

    • @tlaloclopez-watermann3499
      @tlaloclopez-watermann3499 Місяць тому

      @@jonathanbastow3538 www.chromlech.fr/media/support/docs/101012_New_En/03-Svoboda2.0-SV103-en.pdf

    • @felixlohrer9600
      @felixlohrer9600 Місяць тому

      Svoboda ramps use low voltage head mirror lamps (9 x 24 V in series -> 230 v for european use) and a donut to prevent spilling. Was invention by stage designer Josef Svoboda. Then they were gone and the theatres that had them were protecting them as treasure. Meanwhile, ADB makes them again. The light curtain was very sharp and thus kind of a holy grail for light design. Btw your videos are great stuff!

  • @tsraikage
    @tsraikage Місяць тому

    "including my hair"💀😂

  • @appu5545
    @appu5545 Місяць тому

    you should make more videos

  • @Chicky_Lumps
    @Chicky_Lumps 2 місяці тому

    Finally, a nerd with charisma.

  • @DJRonnieG
    @DJRonnieG 2 місяці тому

    I feel like I was just tricked into appreciating theater while looking for a scientific answer as to how a "lime light" work.

  • @owstenholderness1533
    @owstenholderness1533 2 місяці тому

    That was neat thankyou! I was trying to find a video demo of arc lighting originally

  • @joelanderson6614
    @joelanderson6614 3 місяці тому

    Your voice is identical to Matt Frewer, in case no one has ever told you... I love it!

  • @dakel20
    @dakel20 3 місяці тому

    The bottle constantly changing about killed me, Great video in general and very informative!

  • @eddie95795
    @eddie95795 4 місяці тому

    Thankyou

  • @kentonmiles
    @kentonmiles 5 місяців тому

    I came for the Science I liked it for the Comedy

  • @calypsohandjack9278
    @calypsohandjack9278 5 місяців тому

    Thanks nerd man. You have served the internet well today. Go read a book and get smarterer.

  • @RaiyanKamal
    @RaiyanKamal 5 місяців тому

    That lime joke was excellent! I'm adding it to my collection of dad jokes.

  • @rickshae2506
    @rickshae2506 6 місяців тому

    Wish I had became a chemist instead. Looked way more fun to experiment with the elements but also had to be careful not to get yourself in trouble

  • @sirlayorn7355
    @sirlayorn7355 6 місяців тому

    After the modern electric light is on: - Where is my Hair???

  • @johngalt7382
    @johngalt7382 9 місяців тому

    Lighting a lime with a lime limelight, now if you were say brittish....

  • @BjrnSeest-el7uz
    @BjrnSeest-el7uz 9 місяців тому

    Great set of videos! I have watched them all and learned quite a bit. I have struggled with connecting low wattage lights (LED and conventional) to different modern dimmers without ghosting or light flicker. Even at a concert hall with modern electronic dimmers. Would it be possible to do a talk on the difference in modern dimmers (something around 1970 to now)?