k brown
Well-known member
Unlike most I've seen, this appears to have two FB loops. The 15k in parallel with the R in the 'outside' loop I added to reduce gain from ~40dB, to a more manageable ~30dB; but is that the right one to change - should gain be set by changing the 10k R in the 'inner' loop?
If these are two FB loops, would this be done to improve linearily/distortion, or some other reason?
Also, is the 200uF cap bypassing the 1.5k to gnd be functioning like a cathode bypass in a tube gain stage? - it increases gain but adds a bit of distortion?; would this circuit be cleaner without it? Less gain is actually what I'm after. Optimally, a switch between 20dB and 30dB.
Or should I just leave well enough alone, and just put a pot on the input ; - )
Thanks
If these are two FB loops, would this be done to improve linearily/distortion, or some other reason?
Also, is the 200uF cap bypassing the 1.5k to gnd be functioning like a cathode bypass in a tube gain stage? - it increases gain but adds a bit of distortion?; would this circuit be cleaner without it? Less gain is actually what I'm after. Optimally, a switch between 20dB and 30dB.
Or should I just leave well enough alone, and just put a pot on the input ; - )
Thanks