Patrick Jankowiak wrote:

don't laugh too hard, In the ARRL handbook it claims 8 watts audio from an 12AX7 in zero bias class B push pull into 8000 ohms. I have never understood that one, if you look at the currents stated in the book, they seem pretty high for the tube.

PJ


Oh, I don't know...

250Ep into 8kOhms is 0.03125A (around 30mA)
250Ep * 30mA Ip = 7.8125W

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-Geoff/W5OMR

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