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Author Topic: Your today in pictures..
Lee Mannering
Film God

Posts: 2877
From: The Projection Box
Registered: Nov 2006


 - posted September 28, 2015 07:08 AM      Profile for Lee Mannering     Send New Private Message       Edit/Delete Post 
One thing I particularly enjoy are images like most of us by nature of this forum. Another I vacate has an enjoyable thread which can be pretty random titled 'Your today in pictures' where users post photos of something they captured of interest today, everything from landscapes, pets or Eumig's.

Today 30 minutes strip cleaning my favourite Eumig.
 - [Cool]

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Steve Klare
Film Guy

Posts: 6106
From: Long Island, NY, USA
Registered: Jun 2003


 - posted September 28, 2015 09:57 AM      Profile for Steve Klare   Email Steve Klare   Send New Private Message       Edit/Delete Post 
This idea is up there with "What Films did you Watch Last Night", Lee! I think we will enjoy it here a long time.

 -

This is a patch of wild Prickly Pear Cactus at a nature preserve not very far from home. It's fascinating stuff: about two years ago we were out getting some fresh air and noticed this and I was shocked to find out even here where it snows and can dip down to Zero (Farenheight!) more than once a winter we have Cactus!

It's entirely possible that a few months from now this ornery little patch will spend a couple of weeks buried in snow two feet deep, and come through it no worse than slightly wilted!

This is the only species of cactus that grows wild East of the Mississippi in North America. Our sandy soil is friendly to it and apparently there are many acres of it scattered all over Long Island. This is not desert, though. This is maybe 200 feet from a tidal harbor on our North Shore.

It's a slight cheat: I shot the picture on Saturday. Although It is still there, probably was a hundred years ago and just may be a hundred years from now too!

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All I ask is a wide screen and a projector to light her by...

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Panayotis A. Carayannis
Jedi Master Film Handler

Posts: 798
From: Athens,Greece
Registered: Jul 2008


 - posted September 28, 2015 12:47 PM      Profile for Panayotis A. Carayannis   Email Panayotis A. Carayannis   Send New Private Message       Edit/Delete Post 
Let us not stray from the purposes of our forum!

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Steve Klare
Film Guy

Posts: 6106
From: Long Island, NY, USA
Registered: Jun 2003


 - posted September 28, 2015 01:14 PM      Profile for Steve Klare   Email Steve Klare   Send New Private Message       Edit/Delete Post 
I understand what you are saying, Panayotis.

This is probably a better General Yak, but It's a great idea. It's a chance for all of us to see pictures from all over the world, maybe every day.

I've asked Doug to consider a transfer.

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All I ask is a wide screen and a projector to light her by...

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Graham Ritchie
Film God

Posts: 3233
From: New Zealand
Registered: Feb 2006


 - posted September 28, 2015 02:40 PM      Profile for Graham Ritchie   Email Graham Ritchie   Send New Private Message       Edit/Delete Post 
Great idea Lee [Cool]

Taken two days ago when we went to a local hardware store. Zoe trying out some of the stuff on sale.
 -
[Smile]

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Lee Mannering
Film God

Posts: 2877
From: The Projection Box
Registered: Nov 2006


 - posted September 29, 2015 07:16 AM      Profile for Lee Mannering     Send New Private Message       Edit/Delete Post 
Yep I thought after it may be better settled in General chat.

This mornings picture of our Mayor at the MacMillan Cancer Support coffee morning where we announced the results of our cake baking had raised £100 for it on Monday. Most of the cakes were baked by the children.
 -

I should have the Eumig back together today for tonight's show yay!

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Steve Klare
Film Guy

Posts: 6106
From: Long Island, NY, USA
Registered: Jun 2003


 - posted September 29, 2015 12:08 PM      Profile for Steve Klare   Email Steve Klare   Send New Private Message       Edit/Delete Post 
High Noon at The OK (equipment) Corral. Brookhaven National Laboratories, Upton, New York

This is a transformer we have in our tested equipment cage here at BNL. It’s a big one: 333,000 VA, or 3,330 typical projection lamps in our way of thinking. It’s not a super-big one, those run in the millions of Volt Amperes, sit behind barbwire topped cyclone fences, hum menacingly and power entire neighborhoods.

All due respect though: if this fell on you from almost any height, they would probably bury you in an envelope after a great deal of mopping.

These are kind of an unsung technology, probably as important as the internal combustion engine and arguably much more important than the personal computer, because if it wasn’t for the transformer, almost none of us would have one of them, but how many people understand what they do?

These take advantage of a basic fact of electricity: Volts times Amperes =Power. This means a thousand volts and an amp is the same power as a thousand amps and a volt. A transformer acts kind of like a set of gears: Torque times Rotational speed=Power, so you can use different gear ratios to either go really fast or twist really hard or anywhere in between.

A transformer does something similar by changing the values of Volts and Amps, but keeping the power the same by dividing one by the same ratio it multiplies the other.

A problem you have with sending electric power all over the place is Amps don’t travel well. The power lost is proportional to the current squared, so in order to send a large current a long distance you would need thick wire that would cost huge amounts and bend utility poles in half. Once Utah ran out of copper, it would be lights out!

This is where our friend the transformer comes in. It can use its ability to change the values of current and voltage to take the power at the power plant, boost the voltage up to downright terrifying levels (often millions of Volts) yet at a tiny trickle of current which can go vast distances through small wires. When it gets wherever we need it another transformer does the same thing in reverse: reduces the voltages to levels that won't leap across the room and kill us yet still at usable power levels.

The alternative would be to have a power plant every block or so, which simply means that most of us wouldn’t have electric power in our homes today. There wouldn’t even be any debate between video and film for home entertainment: “projection” would mean shadow puppets by kerosene lanterns.

These work very reliably, efficiently and simply. The technology is well over a hundred years old, yet doesn't change very much because it works so well. Many of these still in use were put in during our grandparents' day: there is no reason to replace them.

So the next time you see a transformer, thank it! It of course is an inanimate object and doesn’t care, but it’s good for us to appreciate what we have!

 -

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All I ask is a wide screen and a projector to light her by...

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Bryan Chernick
Jedi Master Film Handler

Posts: 620
From: Bothell, WA, USA
Registered: Mar 2010


 - posted September 29, 2015 01:50 PM      Profile for Bryan Chernick   Email Bryan Chernick   Send New Private Message       Edit/Delete Post 
This is a recent photo of my Nizo Heliomatic 8 Focavorio Regular 8mm movie camera with a Schneider - Kreuznach Variogon f/1.8 8-48mm zoom lens. It is currently loaded with Kodak Ektachrome 100D.

I Photographed it with a Graflex Crown Graphic 4x5 large format camera with Graflex Optar f/4.7 135mm lens. The film is Ilford Delta 100.

I've been experimenting with home brewed developers like Caffenol which uses instant coffee to develop black and white film. There are many recipes for Caffenol online. I found a blog post where someone developed print film with beer so I wanted to try it with negative film. The recipe I used is two 12 oz cans of beer, 5.5 teaspoons of washing soda and 2.5 teaspoons of vitamin C. I developed it for 12 minutes at 20 C with 30 seconds of agitation at the start and 10 seconds every minute. Water stop bath then normal fix. It is slightly underdeveloped so I have since increased the development time to 16 minutes with 15 seconds of agitation every minute. I used a local beer called Rainier which is a lager, I have also used Budweiser and Pabst Blue Ribbon.

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Bill Phelps
Phenomenal Film Handler

Posts: 1233
From: USA
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 - posted September 29, 2015 04:06 PM      Profile for Bill Phelps     Send New Private Message       Edit/Delete Post 
Beautiful photo Bryan!

I love Nizo! I have a Nizo S80 super 8 camera....

Again, wonderful photo.

Bill [Smile]

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Paul Adsett
Film God

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From: USA
Registered: Jun 2003


 - posted September 29, 2015 06:30 PM      Profile for Paul Adsett     Send New Private Message       Edit/Delete Post 
Steve is such a genius at explaining all things electrical in every day terms. How right he is about the transformer being the unsung hero of electrical transmission. All thanks to George Westinghouse of course, who championed AC, whereas Edison wanted all power transmission to be DC. How he disliked all things Westinghouse, but that fact revealing once more that, genius as he was, Edison gets a lot of undeserved credit ( he did not invent the film projector, (that honor goes to the Lumiere Brothers in France).
Bryan, that's a great looking Nizo Reg 8mm camera. So much great engineering and character, it makes a home digital movie camera look like a piece of plastic junk!

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The best of all worlds- 8mm, super 8mm, 9.5mm, and HD Digital Projection,

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Bill Phelps
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From: USA
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 - posted September 29, 2015 06:46 PM      Profile for Bill Phelps     Send New Private Message       Edit/Delete Post 
quote:
The technology is well over a hundred years old, yet doesn't change very much because it works so well.
Steve, we used to be able to say this about film....!

Bill [Smile]

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Kevin Clark
Jedi Master Film Handler

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From: Bapchild, Kent. UK.
Registered: May 2004


 - posted September 29, 2015 06:59 PM      Profile for Kevin Clark   Email Kevin Clark   Send New Private Message       Edit/Delete Post 
That transformer is a beauty Steve - just popped on my reading glasses to see the picture better and realised it's size sitting there on a pallet!

Paul - I always thought George Westinghouse was more the entrepreneur / financier in partnership with the true AC pioneer and inventor Nikola Tesla:

https://www.pbs.org/tesla/ll/ll_warcur.html

Kevin

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Steve Klare
Film Guy

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From: Long Island, NY, USA
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 - posted September 29, 2015 07:49 PM      Profile for Steve Klare   Email Steve Klare   Send New Private Message       Edit/Delete Post 
Thanks Paul, yet being called a genius in the same paragraph as Edison and Westinghouse is downright humbling!

(I had an Engineering school to go to because of what men like these figured out without one! On my own I might have wound up a blacksmith!)

The beast in question is about 30 inches tall and about four feet wide. A thousand pounds is probably about right and when we need to move it we'll call for a forklift. It is really three transformers on the same frame to take 3 Phase power from our sub-station and step it down for this immense power supply we have here.

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All I ask is a wide screen and a projector to light her by...

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Paul Adsett
Film God

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From: USA
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 - posted September 29, 2015 08:04 PM      Profile for Paul Adsett     Send New Private Message       Edit/Delete Post 
Thanks for that Kevin, an amazing read about the genius of Tesla.

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The best of all worlds- 8mm, super 8mm, 9.5mm, and HD Digital Projection,

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Graham Ritchie
Film God

Posts: 3233
From: New Zealand
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 - posted September 30, 2015 01:00 AM      Profile for Graham Ritchie   Email Graham Ritchie   Send New Private Message       Edit/Delete Post 
Talking about transformers [Smile] ...well I removed this one from an old slide projector that, in its "past life" would supply voltage to a 12 volt lamp. After pulling everything apart, I was going to use it, to operate a 12 volt relay, used for heavy duty applications. The problem was the 12 volts from the transformer must have been AC as the relay would only buzz but not operate.

For $3.50 I bought a four pin rectifier..."that did the trick" to give me the 12 volts DC...bingo the relay now works. The idea of all this, is to wire the mains motor to the relay, and the 12 volts through a 5 amp CB to the old wrap detector for the 35mm platter.

In the event of a platter "wrap up" the switch that's on the detector at the moment will kill the 12 volt supply, thus the relay will release, shutting the motor down. The run down of the projector with film on the accumulator side of the wrap detector will allow the film to come to a slow halt, without any strain to film or projector.

That's the theory folks [Roll Eyes] and it should work, all the components are operating well in there electrical range.

In this photo is the general 12 volt layout, once everything is fitted neatly into the speaker box, then I will sort out the mains side of things. The mains fuse 5amp and the 5amp CB for the 12 volt supply should make thing nice and safe. I have included a green 12 Volt 10 amp illuminated LED switch...power on.. circuit complete projector can start... LED out 12 volts off line... motor stops [Wink]  -

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Terry Sills
Phenomenal Film Handler

Posts: 1117
From: Weymouth,Dorset,England
Registered: Oct 2012


 - posted September 30, 2015 02:43 AM      Profile for Terry Sills   Email Terry Sills   Send New Private Message       Edit/Delete Post 
Steve
Great article about transformers. I'm always in awe of anyone who knows their stuff when it comes to electronics and from your previous postings you obviously are very competent, but I am confused when you talk about volt amps (it doesn't take much). Isn't a volt amp the same as a watt? If it is the same why the different terminology- Or if it is not the same what is the difference?

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Steve Klare
Film Guy

Posts: 6106
From: Long Island, NY, USA
Registered: Jun 2003


 - posted September 30, 2015 06:33 AM      Profile for Steve Klare   Email Steve Klare   Send New Private Message       Edit/Delete Post 
Hi Terry,

A VoltAmp is the same as a Watt...sometimes!

In a lot of AC circuits you have energy storage in inductance and capacitance and you get a phase shift between current and voltage In these cases you need more current to get the same actual power out. So VA>P

That extra current doesn't light your screen or cook your breakfast, but it can pop your fuses, melt your wires and fry your transformer, so devices like this are rated in VoltAmperes and not Watts.

Now someone take a picture!

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All I ask is a wide screen and a projector to light her by...

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Terry Sills
Phenomenal Film Handler

Posts: 1117
From: Weymouth,Dorset,England
Registered: Oct 2012


 - posted September 30, 2015 08:16 AM      Profile for Terry Sills   Email Terry Sills   Send New Private Message       Edit/Delete Post 
Thanks Steve
That sort of explains it to uninitiated like me! But I feel my brain beginning to bleed so I'll leave it there.
As I've said before - love your sense of humour. I also like the way you are gently introducing your son into the world of Cine (great looking kid) and better I think than just giving him a top of the range machine with which he would get bored with in five minutes and move onto another medium. I'm sure he enjoys watching you restore old projectors and getting involved. Hope so.

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Steve Klare
Film Guy

Posts: 6106
From: Long Island, NY, USA
Registered: Jun 2003


 - posted September 30, 2015 08:21 AM      Profile for Steve Klare   Email Steve Klare   Send New Private Message       Edit/Delete Post 
Thanks!

Brain Bleed is to be expected in cases like this. I learned it in High School!

-As if coping with adolescence wasn't bad enough: I also had inductance, capacitance, phase diagrams, resonance and power factor to wrap my brain around!

Of course there were no girls in those classes (back then), so that did simplify things a little...

(Not saying I was happy about it!)

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All I ask is a wide screen and a projector to light her by...

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Paul Adsett
Film God

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From: USA
Registered: Jun 2003


 - posted September 30, 2015 09:31 AM      Profile for Paul Adsett     Send New Private Message       Edit/Delete Post 
Steve's analogy between transformers and gear trains is brilliant! Think about it, the voltage change ratio in a transformer corresponds to the mechanical advantage of a gear or pulley system, and the current change ratio corresponds to the velocity ratio of said system. Energy in = energy out in both the electrical and mechanical systems.

Steve is such a great asset to this forum.

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The best of all worlds- 8mm, super 8mm, 9.5mm, and HD Digital Projection,

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Terry Sills
Phenomenal Film Handler

Posts: 1117
From: Weymouth,Dorset,England
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 - posted September 30, 2015 11:44 AM      Profile for Terry Sills   Email Terry Sills   Send New Private Message       Edit/Delete Post 
Totally agree with you on that Paul. I always read Steve's posts even if I don't understand them [Big Grin]

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Osi Osgood
Film God

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From: #399R K.O.A. Mountian Home, ID. 83647
Registered: Jul 2005


 - posted September 30, 2015 12:55 PM      Profile for Osi Osgood   Author's Homepage   Email Osi Osgood   Send New Private Message       Edit/Delete Post 
Lee, my thanks to you. I'm pretty good about keeping my projectors clean up front, but I don't always get around to taking off the back to get all of those dust bunnies! Problem corrected!

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"All these moments will be lost in time, just like ... tears, in the rain. "

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Brian Fretwell
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 - posted September 30, 2015 04:23 PM      Profile for Brian Fretwell   Email Brian Fretwell   Send New Private Message       Edit/Delete Post 
Of course Steve's explanation of the difference of VoltAmperes and Watts is the reason companies made money selling phase compensation capacitors, as power meters overcharge when counted as in Kilowatt when there is a phase difference.

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Andrew Woodcock
Film God

Posts: 7477
From: Manchester Uk
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 - posted September 30, 2015 07:36 PM      Profile for Andrew Woodcock         Edit/Delete Post 
As well as the reason why fluorescent tubes are so very popular in industrial buildings along with salient pole generator sets to bring about a leading power factor compensation for all those lagging ones brought about by inductive loads in industry.

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"C'mon Baggy..Get with the beat"

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Steve Klare
Film Guy

Posts: 6106
From: Long Island, NY, USA
Registered: Jun 2003


 - posted September 30, 2015 07:43 PM      Profile for Steve Klare   Email Steve Klare   Send New Private Message       Edit/Delete Post 
OK Guys,

'nuff "V"s and "I"s

Who started all this power-tech-talk?

Ohhhh...Yeah... [Roll Eyes]

Next time I'm gonna take a picture of a puppy or a sunset!

Anybody got another picture?

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All I ask is a wide screen and a projector to light her by...

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