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general power tube output impedance chart?
general power tube output impedance chart?
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Old 22nd March 2012, 09:52 PM   #1
speakerfritz is offline speakerfritz  United States
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Default general power tube output impedance chart?

ran across this while doing some googling. anyone know of any others. straight forward charts would be better than math formulas.
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Old 22nd March 2012, 11:17 PM   #2
TonyTecson is offline TonyTecson  Philippines
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general power tube output impedance chart?
i think that those impedances should have B+ voltages associated with them, otherwise they don't tell a whole lot imho....
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Old 22nd March 2012, 11:22 PM   #3
speakerfritz is offline speakerfritz  United States
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i think that those impedances should have B+ voltages associated with them, otherwise they don't tell a whole lot imho....

sounds like a good idea...so does such a chart exist? I posted a Groove tube chart with different bias voltages for different type tubes in another thread. So sure, a plate voltage chart should be floating around somewhere.
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Old 22nd March 2012, 11:31 PM   #4
SY is offline SY  United States
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general power tube output impedance chart?
Those aren't tube output impedances, they're the plate-to-plate impedances of the output transformer for some specific amps.
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Old 22nd March 2012, 11:46 PM   #5
TonyTecson is offline TonyTecson  Philippines
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general power tube output impedance chart?
it says on the charts, primary impedances, so i assume they are plate to plate impedances, what caught my eye, 2 x kt66 8000 ohms, must be either lower powered or high B+....
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Old 22nd March 2012, 11:51 PM   #6
Globulator is offline Globulator  United Kingdom
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Quote:
Originally Posted by Tony View Post
it says on the charts, primary impedances, so i assume they are plate to plate impedances, what caught my eye, 2 x kt66 8000 ohms, must be either lower powered or high B+....
Is that across the whole PP primary though, or from each leg to the centre tap?
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Old 22nd March 2012, 11:52 PM   #7
SY is offline SY  United States
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general power tube output impedance chart?
It's plate-to-plate for the push-pull amps.
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