Croft 25 Cathode Follower?

[fiddlemaker]

I have modified a couple of Croft preamps to cathode follower output.

Just because the preamp uses the 12BH7A/ECC99 doesn't mean it is a cathode follower, unless modified accordingly.

Thanks, Alan - that's very helpful. I guess I can assume that Glenn didn't implement this mod when my pre-amp was upgraded as I didn't ask him to do it at the time.

Could I ask what the CF mod involves, how much it changes the output impedance and are there any downsides?

Thanks again

John