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Old 25th Jul 2020, 4:31 pm   #1
PJL
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Default The Original Upcycled Lamp - CRT unit

I guess this is a piece of lab equipment. It appears to be a display unit with only X1/X2 and Y1/Y2 inputs.

Fun, but not 45 worth of entertainment to me.
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Old 25th Jul 2020, 5:11 pm   #2
TonyDuell
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Default Re: The Original Upcycled Lamp - CRT unit

My guess is those terminals go straight to the X and Y plates in the CRT (it doesn't look large enough to contain amplifiers).

If this is being sold to the general public I would be a little concerned about the risk of that CRT imploding.
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Old 25th Jul 2020, 5:41 pm   #3
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Default Re: The Original Upcycled Lamp - CRT unit

There was an identical one being sold at Ford Car boot sale before lockdown, I decided not to buy.

Peter
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Old 25th Jul 2020, 6:09 pm   #4
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Default Re: The Original Upcycled Lamp - CRT unit

Quote:
Originally Posted by Electronpusher0 View Post
There was an identical one being sold at Ford Car boot sale before lockdown, I decided not to buy.

Peter
Probably the same one as this is in Brighton.
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Old 25th Jul 2020, 6:49 pm   #5
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Default Re: The Original Upcycled Lamp - CRT unit

Quote:
Originally Posted by TonyDuell View Post
My guess is those terminals go straight to the X and Y plates in the CRT (it doesn't look large enough to contain amplifiers).
if this is the same one that I saw at Ford car boot I can confirm that Tony is right. The base is missing so you can see the wiring, just a power supply for the crt. The terminals on the back go straight to the crt base.

Peter
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Old 25th Jul 2020, 6:55 pm   #6
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Default Re: The Original Upcycled Lamp - CRT unit

I can't make out the maker's name on the label but it looks to me like something a school/college would have to demonstrate the workings of a CRT.
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Old 25th Jul 2020, 6:56 pm   #7
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Default Re: The Original Upcycled Lamp - CRT unit

I can't quite read the model number.

It has a bit of a Griffin and Tatlock/George/Sons look about it

Cheers

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Old 25th Jul 2020, 7:22 pm   #8
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Default Re: The Original Upcycled Lamp - CRT unit

Mullard B100.

Lawrence.
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Old 25th Jul 2020, 7:30 pm   #9
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Default Re: The Original Upcycled Lamp - CRT unit

Nice one Laurence

Cheers

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Old 25th Jul 2020, 7:43 pm   #10
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Default Re: The Original Upcycled Lamp - CRT unit

Curious- I would have expected a schools etc. demonstrator to have a better protected tube with at least a bit of shrouding/hooding. If nothing else, a bit more secure soft clamping (in the mechanical sense....) for that vulnerable tube. Could it have been a quick-change acceptance jig used by the manufacturer or someone like the MoD for checking gun centering, focus, deflection linearity and so on?
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Old 25th Jul 2020, 7:56 pm   #11
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Default Re: The Original Upcycled Lamp - CRT unit

The Mullard B100 was used as a base unit in this oscilloscope construction article....P.W. December 1947, mag. page 497:

https://worldradiohistory.com/UK/Pra...PW-1947-12.pdf

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Old 27th Jul 2020, 10:38 am   #12
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Default Re: The Original Upcycled Lamp - CRT unit

That's a challenge for KarenO if ever I saw one!
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Old 27th Jul 2020, 2:00 pm   #13
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Default Re: The Original Upcycled Lamp - CRT unit

I think it was all exposed and not shielded so that they could experiment with magnetic deflection by waving coils and magnets around.

Nowadays it's at risk of being repurposed into a clock.

David
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Old 29th Jul 2020, 2:52 pm   #14
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Default Re: The Original Upcycled Lamp - CRT unit

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Originally Posted by Radio Wrangler View Post
I think it was all exposed and not shielded so that they could experiment with magnetic deflection by waving coils and magnets around.

Nowadays it's at risk of being repurposed into a clock.

David
Where is it?

It needs securing. We can discuss what to do with it later.
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