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This is what my father used in the sixties, Hallicrafter Loudenboomer Mk2. You can see the glowing massive pentode. He was a big believer in moar power! There was no need to heat the radio shack! You wouldn't survive a shock from the power supply, unlike the Model T spark coils that were popular for pranks in the 60's!

TAT


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It's the Despair Quotient!
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Originally Posted by TatumAH

This is what my father used in the sixties, Hallicrafter Loudenboomer Mk2. You can see the glowing massive pentode. He was a big believer in moar power! There was no need to heat the radio shack! You wouldn't survive a shock from the power supply, unlike the Model T spark coils that were popular for pranks in the 60's!

TAT

Assuming it's transmitting into a dummy load, because that was an incredibly low SWR reading.
Pentode almost reminds me of an Eimac tube.


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That dummy heated up a gallon of mineral oil pretty quickly!
TAT


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Mine was made from a flowerpot that was easy to drill hole for carbon rods harvested from D cell batteries

Exactly my setup. I suspect we both had the same "Boy's Guide to Deadly Fun" book. Glass pan filled with salt water? Yup.

Never once burned or zapped by either the carbon arc or the neon sign transformer. Later in Electronics class, our teacher demonstrated how to tell if a lamp socket had 120 VAC live by sticking your finger in it. And yes, I did it. Not painful if your finger is dry and you are not grounded anywhere. Mr. Deason would have been fired in a minute if stuff he did like that every got out!


We're flying electric helicopters on Mars yet you can't turn on your clothes dryer in Texas. That's because scientists are in charge of Mars, and Republicans are in charge of Texas.
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Quote
Exactly my setup. I suspect we both had the same "Boy's Guide to Deadly Fun" book. Glass pan filled with salt water? Yup.[/quote]

That book, our blue Bible, is still available kid danger book
Except it was Titled: 700 Science Experiments for Everyone Hardcover – January 1, 1958
compiled by UNESCO (Author)
I found my copy but cant quite figure out how to post the reminiscent images of the carbon arc furnace with salt water rheostat. My copy has some interesting stains on it, and a few holes burned into the cover.
Will post them when I figure it out. Had trouble with dropbox.

TAT


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Originally Posted by TatumAH


That dummy heated up a gallon of mineral oil pretty quickly!
TAT

Yeah I bet!
PS: Isn't it a shame we stuck with that old 1930's analog TV tech for as long as we did?
Looking at that video, which is admittedly quite a few generations down and already run through some horrible codec, you can still
tell that the moire patterns in that clip originated in the master.
I'm not even sure it would have been avoidable if we'd moved over to PAL, (albeit with 30 fps instead of 25) but it might have been
less pronounced.
The crowd dissolved into "HOLY BEAT FREQUENCY, BATMAN!" ROTFMOL

[Linked Image from cdn.britannica.com]

Last edited by Jeffery J. Haas; 11/18/21 02:14 PM.

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Originally Posted by pondering_it_all
Quote
Mine was made from a flowerpot that was easy to drill hole for carbon rods harvested from D cell batteries

Exactly my setup. I suspect we both had the same "Boy's Guide to Deadly Fun" book. Glass pan filled with salt water? Yup.

Never once burned or zapped by either the carbon arc or the neon sign transformer. Later in Electronics class, our teacher demonstrated how to tell if a lamp socket had 120 VAC live by sticking your finger in it. And yes, I did it. Not painful if your finger is dry and you are not grounded anywhere. Mr. Deason would have been fired in a minute if stuff he did like that every got out!

Did your Science Teacher ever recite any Little Willie limericks, like

Little Willie was a chemist,
Little Willie is no more.
What Willie thought was H20
Was H2SO4


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Originally Posted by Jeffery J. Haas
Originally Posted by TatumAH


That dummy heated up a gallon of mineral oil pretty quickly!
TAT

Yeah I bet!
PS: Isn't it a shame we stuck with that old 1930's analog TV tech for as long as we did?
Looking at that video, which is admittedly quite a few generations down and already run through some horrible codec, you can still
tell that the moire patterns in that clip originated in the master.
I'm not even sure it would have been avoidable if we'd moved over to PAL, (albeit with 30 fps instead of 25) but it might have been
less pronounced.
The crowd dissolved into "HOLY BEAT FREQUENCY, BATMAN!" ROTFMOL

[Linked Image from cdn.britannica.com]

Was the Beat Frequency Mastered? rolleyes
TAT


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Yes Indeed, but I didnt have a real science teacher until 7th grade, and by then safety instruction was pretty much too little too late! You learn lots more in the lab from experience than instruction, like hot glass and hot steel look pretty much like cold glass and steel.
We were more visual in our chemical humour, but my high school chem teacher did ponder a bit when I asked him what was H2O4, and groaned when the answer was to drink!
Chemical naming quiz

The blue book does have scattered safety hints strategically placed. It suggests that for the salt water 120V rheostat, you should use a glass or ceramic dish, not metal! Also, while using the carbon arc, the use of sunglasses is advisable. I have never seen an arc that was safely viewed through sunglasses, and most of us didnt have welding goggles back then. We used heavily smoked glasses, like you could use to view the eclipse that starts here around 1 here EST and peaks around 4! Dont look directly at it, because your cataracts from carbon arc use will obscure the details! mad

Mr Barr, if you're still out there, my parents did not appreciate your sarcasm when you suggested that for a particular experiment we should use our parents best china, but at least I seemed to have taken the sarchasm to heart and long term memory.
TAT


There's nothing wrong with thinking
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"Lab experience"

Funny, I never took chemistry in high school. (I did actually have a radiation biology class, though.) A lot of my science was self-taught. Still aced the ACT and was offered honors classes when I started college. Loved all my chemistry classes.


We're flying electric helicopters on Mars yet you can't turn on your clothes dryer in Texas. That's because scientists are in charge of Mars, and Republicans are in charge of Texas.
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