65HzCurtZHP said:In this version, the HPF should provide a roll-off at around 85Hz.
PRR said:>> around 85Hz.
> 65Hz
I get 72Hz.
Are we accounting for the 12AX7+100K acting like a ~~39K source impedance?
Use a simulator. LTspice is good for that. It agrees with ca. 65Hz. F=1/2pi.R.C with C=8.2n and R=250k+39kCurtZHP said:Couldn't find a formula that took that into account. How would I account for that?
My ballpark figure was 50k for source impedance, but for some reason I thought C10 was 1u not 0.1u. So 50k+250k and 0.1u+0.0082u is ~70Hz.PRR said:>> around 85Hz.
> 65Hz
I get 72Hz.
Are we accounting for the 12AX7+100K acting like a ~~39K source impedance?
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