Please Help! Time Constant Question ....

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Hi All
The original design that I am mucking around calls for a 68k from cathode to ground, and a coupling cap of 1uF.
The tube is a 12AX7, but I want to change it to a 12AT7. I would like to use a 33k on the cathode for more current to the 12AT7.
The question is do I change the coupling cap to 2uF or do I ignore it as the tube change has adjusted for the time constant?
AQny help here would be much appreciated.
Cheers
William

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Parts Connexion

Topic - Please Help! Time Constant Question .... - KIS 19:50:40 03/19/06 (3)

Thanks. Two quite diffrent answers .... - KIS 10:10:49 03/22/06 (0)

Do you change input resistor of the following stage? - sser2 11:33:19 03/20/06 (0)

You should adjust to twice the value ... - Naz 21:27:22 03/19/06 (0)

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