Hey Myles! I originally started a new thread with this one, but this is probably a better place for my question. I have a JCM 600 all tube head and cab. It has 2 Svetlana EL34s in the power amp section and 4 ECC83s (12AX7) in the pre-amp stage. It has clean and overdrive channels. I have to replace the power amp tubes as one of them has died. I'm wondering if the power tube section of the amp really plays a crucial role in the tone and if I could change the tone in this area? Also, I've read the some stuff on a link you posted about how the pre-amp tubes can change the tone of an amp. I'm wondering if there are any tubes out there that can make the overdrive channel have more distortion and bite. Or if not, is there a mod that can be made to the amp do this. I'm not fond of the overdrive I'm getting now (well not now as the amp is dead, but when it was working). It sounds too smooth with hardly any bit and the distortion is kinda tame. I usually use the clean channel at just about full volume with a Tube Screamer and a Boss EQ in front. I'd like to have a more dynamic sound as I don't have a "clean" channel as such. Just curious if theres something like a "JCM 600 to JCM 800 mod" sorta like the familiar TS-9/TS-808 mod. Thanks.
