individual NFB ? on 2 ch champ build

[spark_right]

Hi ,
Firstly a big thanks to all the people that share their knowledge with us novices .
I have a Vchamp kit , but ..
I'd like to make it a 2 ch, 2 tonestack, preamp stage , one BF'y and the other Tweedy .
I want to switch from one channel to the other without needing to switch the NFB as well.
Can i use an NFB resistor coming off each of the preamp tubes cathodes ?
When you've stopped laughing , would you mind telling me why not , i can only guess. I've learnt to read schems but not a real lot more yet .

[Old Tele man]

...No, because the channel with active NFB would also be "feeling" the effects of the static NFB from the inactive channel, especially with direct DC-coupled NFB.

...however, if AC-coupled NFB is used, then "yes" your idea should work.

[spark_right]

Thanks for the reply Old Tele man .
Me being a novice i suspect you knew there would be another question .....
Where can i look to read up on that , a schematic , another source of info ?.
And will AC coupled NFB effect the circuit in any way with respect to the final sound ?

."...yes, but it's a DRY heat!" good because i find even 25° and humid unbearable