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Getter Temperature
Getter Temperature
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Old 11th July 2018, 03:23 AM   #1
FullRangeMan is offline FullRangeMan  Brazil
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Default Getter Temperature

Found this image on web a few years ago, wonder which column refers to audio tubes?
I enlarged this picture 1400x866 hope it visible.
Click the image to open in full size.
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Old 11th July 2018, 08:22 AM   #2
JonSnell Electronic is offline JonSnell Electronic  United Kingdom
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The Getter activates at above 1200℉ or 690℃. Commonly placed inside an induction heater and of course, its design, is why it presents itself as a shorted turn to the eddy currents and heats up without affecting the anodes.
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Old 11th July 2018, 08:29 AM   #3
JonSnell Electronic is offline JonSnell Electronic  United Kingdom
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If you have the time, this is a YouTube link to Mullard Valve production, circa 1938.
Part of our heritage, hopefully never to be forgotten.
YouTube
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Old 11th July 2018, 09:17 AM   #4
Merlinb is offline Merlinb  United Kingdom
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Quote:
Originally Posted by FullRangeMan View Post
which column refers to audio tubes?
The one labelled 'Ba and Ba compounds'. Possibly also the last two columns before phosphorus, i.e. Batalum and Berylliata.
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Last edited by Merlinb; 11th July 2018 at 09:20 AM.
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Old 11th July 2018, 09:36 PM   #5
FullRangeMan is offline FullRangeMan  Brazil
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Quote:
Originally Posted by Merlinb View Post
The one labelled 'Ba and Ba compounds'. Possibly also the last two columns before phosphorus, i.e. Batalum and Berylliata.
Oh Nice. For these colunms the Range Temperature line is 20 - 200C.

So the Getter activation range start at 20C ??
Very easy for baking tubes in a electric owen.
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Old 12th July 2018, 07:08 AM   #6
petertub is offline petertub  Sweden
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Quote:
Originally Posted by FullRangeMan View Post
Oh Nice. For these colunms the Range Temperature line is 20 - 200C.

So the Getter activation range start at 20C ??
Very easy for baking tubes in a electric owen.
One has to differentiate between activation ( the hot procedure that boils the
getter material onto the glass) and the longtime work done by the material
that is deposited on the glass.
The later is active at tube working temperature ( 100-200 degrees celcius ) and may be done in an household owen.
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Old 12th July 2018, 07:46 AM   #7
Merlinb is offline Merlinb  United Kingdom
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Quote:
Originally Posted by FullRangeMan View Post
So the Getter activation range start at 20C ??
Very easy for baking tubes in a electric owen.
150-200 celsius is ideal. Man, my book is useful for everything! See:
Wolfe, G. (1962). Getters. In: RCA Electron Tube Division, Electron Tube Design, p522.
PDF here:
http://www.tubebooks.org/Books/Atwoo...e%20Design.pdf
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Old 12th July 2018, 08:43 PM   #8
FullRangeMan is offline FullRangeMan  Brazil
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Quote:
Originally Posted by Merlinb View Post
150-200 celsius is ideal. Man, my book is useful for everything! See:
Wolfe, G. (1962). Getters. In: RCA Electron Tube Division, Electron Tube Design, p522.
PDF here:
http://www.tubebooks.org/Books/Atwoo...e%20Design.pdf
Thanks for the link Merlin and for the all the others replies boys
Appreciated
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