Interestingly using 6N1P the f3 point at the output simulates in the 80KHz range but the 6SN7 only barely make 20KHz unless an un-bypassed Rk is used. I suppose that is the difference in Cg-p (3.8pf v.s 2.7pf).
Is it normal for 6SN7 to have that kind of bandwidth issues or is there something wrong with my circuit or the simulation? I wouldn't thimk the SN7 would have such a good reputation if it was so limited.
Is it normal for 6SN7 to have that kind of bandwidth issues or is there something wrong with my circuit or the simulation? I wouldn't thimk the SN7 would have such a good reputation if it was so limited.
Checked out the PT it is 600V CT so plenty of voltage to work with. The unused OPTs look to be about 6K driving 4 ohms. Might be useful for a 6EM7 project. On the speaker front I think I will set the 8 inchers firing down through the bottom to make for more room to locate the FRs on the front and less trouble avoiding interfering with the preamp and tuner chassis.
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