Re: Cathode follower line out - best practice
There's a rule of thumb which says the output impedance of the source should be less than 10% of the load impedance. So a few hundred ohms from an ECC82 should do nicely if you can sort the HT out.
If you have 2nF of cable capacitance (that's a lot !) then its reactance at 20kHz (the upper limit of anyone's hearing) would still be 16kohm. So you wouldn't have any trouble driving that either.
Cheers,
GJ
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