Author Topic: crack that tube open  (Read 1186 times)

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Online Alex EisenhutTopic starter

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crack that tube open
« on: August 29, 2020, 04:30:25 am »
I used to smash tubes open with a hammer... but I was 8.

This guy does it more delicately.



And he understands the tube unlike 8 y.o. me.  :-DD
Hoarder of 8-bit Commodore relics and 1960s Tektronix 500-series stuff. Unconventional interior decorator.
 

Offline duckduck

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Re: crack that tube open
« Reply #1 on: August 30, 2020, 06:17:18 am »
He's also got a teardown of a 6L6G and another one of a 12AX7 and a 12AU7. That's neat.

EDIT:

Mr. Carlson suggests using heat (e.g. run a bunch of electrons through a few loops of 14 AWG copper wire that you've wrapped around where you scored the tube) to crack a tube open. He says it works well.
« Last Edit: November 12, 2020, 12:56:02 am by duckduck »
 

Offline GlennSprigg

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Re: crack that tube open
« Reply #2 on: August 30, 2020, 11:37:53 am »
Yea, it's interesting to see some of the various types/qualities of construction, from different countries manufacturers.
Particularly when it is often hidden/obscured by various 'getter' silvery colour or blackness!!  Or originally in a Metal Can!
I've often found that old Russian tubes were generally built much more robustly and durable!
Interesting note...
Some brands of Vacuum Tubes were still using 'older' manufacturing processes, in regards to types of or lack of variations of thoriated heaters
etc, and different types/processes of 'getter' use. This generally resulted in a 'blackened' look from the outside. They often didn't want people
to know they were still using antiquated processes, so they would spray paint the whole outer glass with Gold coloured Paint to mask it,
before printing any writing on them.  8)
« Last Edit: August 30, 2020, 01:17:54 pm by GlennSprigg »
Diagonal of 1x1 square = Root-2. Ok.
Diagonal of 1x1x1 cube = Root-3 !!!  Beautiful !!
 

Offline TimFox

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Re: crack that tube open
« Reply #3 on: August 30, 2020, 01:44:51 pm »
Several RCA receiving-tube manuals are available as online PDFs.  Different years had different line drawings showing tube construction, with captions denoting the different elements or steps in the assembly.
 

Online Alex EisenhutTopic starter

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Re: crack that tube open
« Reply #4 on: August 30, 2020, 10:45:11 pm »
Several RCA receiving-tube manuals are available as online PDFs.  Different years had different line drawings showing tube construction, with captions denoting the different elements or steps in the assembly.

I bought a copy of this

https://www.renaud-bray.com/Livres_Produit.aspx?id=894280&def=Tubes+audio+anciens+et+r%C3%A9cents,IBRE,+FRANCIS,9782866611552

Sure it's in French but so many pictures! Covers many makes and countries.
Hoarder of 8-bit Commodore relics and 1960s Tektronix 500-series stuff. Unconventional interior decorator.
 
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