thanks Alwalt! I think I may have to get your suggested mod done. I know this amp has the potential to sound as good as an original DC30.

I just got my used Dizzy 30 head today. Channel 1 is absolutely perfect (the bass & treble channel), it even has a PPIMV mod where channel 1 low input was. It gets great cleans and some real nice overdrives with the master volume.

Now, channel 2 is laid out as standard. When I pop the volume up all the way and take the master up it stays clean all the way, there is no breakup/ overdrive in the tone whatsoever. The volume gets louder but no tonal breakup. Can anyone assist and lets start with the most basic of basic suggestions as sometimes I overlook the obvious. All help is much appreciated and this is my first post so wish me luck!