I tried at7 and au7 in v1 and it smooths out the distortion and this works well for me with out screwing around with the pc board solder joints and trying numerous cap and resistor values.  I'm not into shredding or metal but more classic, southern rock, blues rock tones and this gets it closer to what i'm looking for. Thanks

Thanks, Maybe this is the wrong site for me as you mentioned. the amps really decent but just looking to get more variety out of the distortion sound cause it sounds pretty much exactly the same, dark gritty tone no matter how you set the pre. post. Which is fine for some stuff but not for everything  I'd have to hear from someone that,s owned this model and felt the same for them to know what i mean and see what they came up with But thanks i'll figure it out in time cause i have other amps till then.

guess not

Here's a hard to find schematic if anyone needs it

Anyone do any od channel mods to this model. thanks

Replaced  IC3 problem solve. thanks guys.

Thanks for all the info but this is way beyond my understanding so i'll just make it easy on myself and everyone else and replace Q7 and if that doesn't work i'll change ic3 And eliminate those from the equation. Thanks guys

Will check that first ,thank you

Just thinking out loud i'll check what you mentioned tomorrow. thanks

yes tone stack and vol.work fine. With vol. on ten it's only as loud as maybe at 2. and sounds fine but not loud enough to play with band. Though a novice at electronics wouldn't that mean that Q7 is actually working properly and the problem is either ic3 or something in that section before Q7 thanks

Lead channel normal/ no volume loss

Did all that. Amp just a little louder than the maxed clean channel when plugging into the pwr. amp insert.

Need help figuring out how to find the problem in this circuit. The only thing i have is a multi meter for testing. Its the model on the bottom half of the attached schematic. Replaced ic1 for the heck of it to no avail. thanks

b52 at100 and st100a

Here's two crate schematics