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Ra on C3g and 6C45pi?

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#3
You can easily calculate rp. It is mu/s.
In case of 6s45p-e, mu = 52 and s = 45 mA/V.

But remeber that the value of s depends strongly on the used Ia.
For example in case of triode connected C3g; when Ia = 4 mA, rp = 5 k-ohms.
The specified 2,3 k rp requires 17 mA anode current.
 
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