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In Reply to: Re: parallel output tubes? posted by Paul Barker on May 19, 2002 at 07:56:11:
also remember the effective Rp of the parallel combo is 1/2 that of a single tube... depending on spin control, this could be viewed as a plus.dave
Follow Ups:
So rp is one-half for a parallel pair, what happens to mu and gm?
Gm doubles, mu remains the same, I believe.
Groverg is correct. The amplification stays the same but there is (basically) twice as much conductance. Since there is twice as much current you only need have as much resistance in the cathode circuit go get the same bias as with a single tube. Ron
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