Fairchild clock IC datasheet...

[orange_glow_fan]

Hi,

Does anyone have access to a datasheet for a Fairchild F3817PC clock IC...? I need to know the maximum supply voltage ratings...

Thanks

[Dekatron42]

I've included one I found on the Internet for the 3817A/3817D versions, hope it's the correct one.

/Martin

[orange_glow_fan]

Perfect..figured it out........thanks!

[Ⓙⓞⓗⓝ Ⓢⓜⓞⓤⓣ]

I know many of you like the steampunk look and so might forgive the off-topic picture.

This item was in use every day between 1914 and 1988. Can you guess what it is? I bet some clever clogs here knows.

John S

[Tony]

Acetylene lighthouse lamp?.

[GastonP]

It looks like that, and the tubes are the gas generators. The port for loading the silicon carbide could be on the opposite side, and the water was to be loaded through the bronze pipes with copper-color stoppers.

[H. Carl Ott]

Silicon carbide ? Or calcium carbide? 

I still have a blue can of it around from 30 years ago when they sold it as camping supplies.  

 

carl
--------------------------------------------------------
Henry Carl Ott   N2RVQ    hcar...@gmail.com

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[Mac Doktor]

On Aug 19, 2020, at 4:26 PM, H. Carl Ott <hcar...@gmail.com> wrote:

Silicon carbide ? Or calcium carbide? 

I still have a blue can of it around from 30 years ago when they sold it as camping supplies.  

Have ever opened it? I've had brand new containers that were opened once and sealed properly go bad in a couple of years.

I still have my toy cannon around here somewhere..

Terry Bowman, KA4HJH
"The Mac Doctor"

"I've seen things you people wouldn't believe: attack ships on fire off the shoulder of Orion... beams...in the dark in the Tannhauser Gate. All those moments will be lost in time...like tears in the rain." — Roy Batty, Blade Runner

[gregebert]

Calcium carbide, a greyish solid, mixed with water, produces acetylene gas. Generating the gas onsite was the only practical method, because acetylene becomes very unstable above 15 PSI. After it was discovered that acetylene can be dissolved into acetone, it became practical to ship and store acetylene at higher pressures. If any of you are gas welders, you will notice the red-line on the pressure gauge after 15PSI. I'm still looking for a good explanation of what happens at the atomic level why acetylene is more stable when it's dissolved; in a full tank you have C2H2 at nearly 300 PSI, which is more than 10x higher than it's safe-handling pressure w/o acetone.

[H. Carl Ott]

Re calcium carbide.

 

 I'll have to open the can to see if it's still any good. Probably trash by now, 

  I always wanted a cannon. Could not buy one,  Had to make my own out of soup cans and a piezo sparker. Nice booms.  

  

carl
--------------------------------------------------------
Henry Carl Ott   N2RVQ    hcar...@gmail.com

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[Mac Doktor]

On Aug 19, 2020, at 5:30 PM, H. Carl Ott <hcar...@gmail.com> wrote:

Re calcium carbide.

 

 I'll have to open the can to see if it's still any good. Probably trash by now, 

  I always wanted a cannon. Could not buy one,  Had to make my own out of soup cans and a piezo sparker. Nice booms.  

We made mortars out of metal pipes with spark plugs and piezo igniters. The ammo was feed corn cut into hockey pucks.

I also had a coffee can with a spark plug. I put one drop of gasoline in it, attached the lid, waited 10 seconds, and then hit the igniter. The lid would bounce off of the ceiling.

Terry Bowman, KA4HJH
"The Mac Doctor"

https://www.astarcloseup.com/

“The book said something astonishing, a very big thought.
It said that the stars were suns, only very far away.
The Sun was a star, but close up.”—Carl Sagan, Cosmos, 1980

[Ⓙⓞⓗⓝ Ⓢⓜⓞⓤⓣ]

The steampunk assembly indeed powered a lighthouse, on the Mediterranean island of Menorca at the promontory of Cavalleria.

The caption on what is now a museum exhibit at the lighthouse says:

"Chance 85 mm system, oil steam lighting equipment. It was in operation between 1914 and 1988. The last lighthouse of all the Balearic Islands where this system was used was here, at Cavalleria."

You people are so clever and knowledgeable,

John

[Bill Notfaded]

Calcium carbide... we used to make carbide cannons with it.  With a couple old steel
Coke cans taped together you could poke a little hole a centimeter up from the base of the two cans... add a couple rocks of the calcium carbide and then we'd have a little tomato can of water and put a little water on the rocks... push in a tennis ball.  Let it build up for a few seconds then through the hole at the base you could see the gas being released in a stream from out of the little hole.  Get your torch just near it and BOOM!  It would send the tennis ball so far up in the sky we would often totally lose them because it went up and so far you could just lose track of it!

https://www.toycannons.ray-vin.com/carbide/carbide.htm 

https://www.toycannons.ray-vin.com/carbide/howworks.htm#:~:text=The%20carbide%20cannon%20was%20invented,a%20small%2C%20localized%20explosive%20atmosphere.

 

Bill