Preamp mods

[makinrose]

I agree with Kevin when it comes to driving the EQ with a cathode follower. After reading TUT5 I conducted my own tests on a JCM-800 type pre-amp that was modded for extra gain and 5F6A Bassman circuit. With the plate drive the eq worked much much better. There is a tonal difference but I personally preferred the plate drive in the JCM 800 which sounded smoother and more pleasant. In juxtaposition I've also tried the same thing on 5F6A Bassman type amp and while the same effect of better EQ sweep occurred but I preferred the cathode follower's sound. However, that might have been just because I was so familiar with it's sound. With additional tweaking I probably could have arrived at a set of component values that I liked the plate drive better for.