Hey guys, this site is amazing. My searches always seem to end up here when it comes to anything about my gear. So thanks for all the help so far!
I have a question about these pro channels. I actually have 2 of them in my rack (i bought one a year ago as my first preamp, and recently found a second one on ebay cheap). My plan was to not only have a backup, but start messing with some outboard processing instead of relying on plugins solely and I wanted to have the ability to use the two units for a stereo signal if needed. Plus, I want to mod one of the preamps (only the preamp, not the other modules, but if changing tubes in the other sections would make a huge difference, I would do that and just make mirror changes in each) so I can have two distinct preamp flavors to choose from when recording. I use this preamp for pretty much every signal that goes into my DAW (except of course when I have to record more than 2 channels at a time, ie drums), and even plan on starting to route some of my VI's out to them to fatten up the sound, including but not limited to vocals, guitars (both direct and mic'ed amps and acoustic), bass, hardware synths etc. So versatility is a plus.
I figure tubes is the easiest way to do this, and while I can solder and all, I am not sure I want to start messing with anything involving the actual circuit designs yet (my experiments with circuit design and modification is very limited, mostly to guitar pickups and one guitar amp, so I don't really understand opamps and all that other stuff yet, but I'm always learning).
Everyone mentions the different brands of tubes, but not the type. I see in the schematics that elektrovolt
posted that the preamp uses a 12ax7 tube while the compressor and eq use 12at7s (please correct me if I am wrong). When you switch out the tubes, are you using the same types and just replacing with different brands, or has anyone experimented with different types as well? Can 12ax7s, 12at7s, 12ay7s, 12au7s, etc be swapped one for one without further modification?
Also, according to the manual, the 1/4" insert send/recieve jacks on the back are unbalanced. I am setting these up with a balanced patchbay and going into my 003+ rack that has both balanced ins and outs, so that way I can have the most flexibility with using the compressor and eq either during recording before the 003 or as an insert during mixing. Has anyone changed these jacks to balanced? Is it possible/not prohibitively difficult to do? If so, could someone point me in the right direction on to do so? Like I said, all my electronics modding up to this point has been on guitars and amps, which don't come anywhere near to the complexity of this recording gear.
Sorry for the long post and my relative lack of knowledge on these subjects, but thanks for any help someone can give!