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not necessarily

Using a 2A3 for example: the 'standard' cathode resistor is 750 ohms; if you wire them in parallel, your effective plate resistance is:

(750/2) x (4.2 + 1) + 800 = 2.75 kohms

This works extremely well with a 10k OPT.





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  • not necessarily - Jim Dowdy 12/5/1311:51:32 12/5/13 (3)

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