12AX7 and 12AT7 numerical data - diyAudio
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Old 23rd June 2005, 07:10 PM   #1
cs is offline cs  United Kingdom
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Default 12AX7 and 12AT7 numerical data

Does anyone have IV curves for the 12AX7 (ECC83) and 12AT7 (ECC81) in numerical form (Excel would be ideal) ?
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Old 23rd June 2005, 08:03 PM   #2
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Here's some data for the 12AT7. The plate voltage only goes up to 40V due to equipment limitations. To see the full precision numbers, you may need to change the number format display under cell properties.
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Old 24th June 2005, 02:50 PM   #3
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Default 12AX7 data

Here is some 12AX7 data in excel format, as requested. I do not know if this is data I measured myself, or whether it is taken from a spec sheet. I usually record the source but sometimes I get lazy and dont bother.

I notice that in the reply to post form that .xls is not a valid extension, so I am making it a zip file. Also, since it is not really very much data, I simply list it below.

By the way, I am not sure how to tell if the file has been successfully attached to my reply. Perhaps more experienced posters can comment ?

12AX7

Vg Vp Ip (mA)
2 100 7.75
2 200 13
1 100 4.5
1 300 10.6
0 50 1.15
0 100 2.15
0 200 4.45
-0.5 50 0.45
-0.5 100 1.22
-0.5 200 3.32
-1 50 0.09
-1 100 0.48
-1 250 3.3
-1.5 100 0.1
-1.5 150 0.52
-1.5 300 3.3
-2 125 0.05
-2 200 0.52
-2 325 2.72
-2.5 175 0.05
-2.5 250 0.52
-2.5 350 2.2
-3 225 0.08
-3 275 0.38
-3 375 1.7
-3.5 275 0.1
-3.5 300 0.2
-3.5 375 0.92
-4 300 0.04
-4 325 0.12
-4 375 0.42
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Robert McLean
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Old 24th June 2005, 04:13 PM   #4
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Oops, looks like attachments aren't working. Try contacting me by email.
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Old 24th June 2005, 06:49 PM   #5
cs is offline cs  United Kingdom
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Thanks Robert and Goldglow,

That will do nicely.
If anyone also has the 12AT7 data, that would also be very useful.

Chris.
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