are those new PCBs for the 4000t or the old ones (because they look new) you are populating?
The Gain Boards will fit most pre's (Carver) if they have a service bulletin for gain adjust (C-1, C-4000, 4000t, etc), and the power supply module can be adapted to many also (Not the C-4000 since they have the power supply blended with the rear amp). The other board I'm putting in, can be used with the preamps that have the holographic circuitry in them (C-1, 4000t, and others). I didn't design the Holographic board, that was done by the guys on The Carver Site. I did use their schematic and built some for my equipment I upgrade, and they don't mind it as long as you don't sell them on ebay. The guys over there actually fixed the shortcomings of the original design and now they work great (I use mine all the time. Me and Glen have been using these 3 boards when upgrading the preamps we get our hands on. The Power supply module I swear by. The power supply circuitry on the pre's from Carver, is pretty much rudimentary and the +12VDC can hover around 9 volts, and the -12vdc can be all over the place. I myself believe that if you have a steady clean 12 volt power supply that the unit will perform better (consistent). When installed, the + and - 12vdc at pretty much spot on (within 50-100mv) and you can play with the caps on the module if you have any noise but it works great. It's easier to deal with issues within a unit, if you know wherever you check, that you have spot on voltages and the units coming off the street, are all over the board. I say if you have a 12 volt power supply, it should put out 12 volts even if some of the opamps and shit can work with 6-18 volts. Plus, I double up on the heat sinks and it runs warm (not hot) and the power is clean on the scope. But hey, that's just my take. I have yet to have a power supply issue since using them. I have passed some of the boards around so if you want to try one, let me know, postage is all I ask (for the bare board) or $15 populated. I remove the original regulators off the power supply and run wires from the module to where the regulators mounted. 6 wires is it...... Plus it has LED's on it so at a glance you can see if your 12 volts it there. I'll drop a pic as soon as I get done stuffing my face.
