value of feedback resistor

[dude]

To get more noticeable difference on the presence pot would one go up or down with the NFB resistor. 8 ohm spk.



al

[shooter]

NFB resistor

make it a pot and see, there are a lot of examples in the NFB threads, since your presence is already a pot I would try messing with the associated cap?

[SILVERGUN]

Great stuff here, dude:

http://www.aikenamps.com/index.php/what-is-negative-feedback

http://www.aikenamps.com/index.php/designing-for-global-negative-feedback

[pompeiisneaks]

just be sure to have some resistance always, it's often good to put some small amount like say 5k inline with the pot, I think if you do straight nfb with no attenuation it could be a bit too extreme no?  I like the idea of a pot too.  Gives you the ability to tweak it until you like it, record the value, and then replace it with something in the ballpark.

~Phil

[dude]

Thanks, the pot is a good idea for tasting, Ailken's site has a lot of good info.


I'm debating to take the presence pot out and replace with a switch.  Play with difference values and get the right one for my ears, pull the pots, replace with a switch. The big boost you get with NFB off is kind of nice and once you set the presence pot you don't usually fool with it too much unless you change often from humbuckers to singles. Just preference.


Thanks everybody,
Sincerely, al