Well for some reason my logic has failed me. I'm in the middle of moding the bias circuit on a 100 watt sound city amp. But now I can't recall after I add another cap and another diode, where those should all be wired to. I know I'll have two caps in series where the existing cap is (left). From the junction of these two caps (center), I'll wire it to the existing neg terminal of the cap in the chassis. Where the one diode is, I'll have two. The other diode will be added to the terminal on the lower left and will be wired into the positive side of the new bias caps (the two that are now in series). . Then there is one other connecton to be made. The Hiwatt Biad Mod Schematic from The Tube Amp Book shows this wired to chassis ground? This is the junction of added diode, and the positive side of the second cap (in series), I'm just not sure where to solder this? A. The plus side of the Capacitor, right next to the existing cap. B. The plus side of the capacitor, right next to the existing cap and on the other side of the 220K bleed down resistor. C. Wire them to a chassis ground point. Actually I guess either would be correct. One should be more correct then the other. I've included pics under my pics here: http://www.myspace.com/theampnerd The are listed under my pics. There are pics of the following: Hiwatt mod schematic the in the amp with the new diode (and old caps) SC100 close up of the bias circuit Any light on the situtation would be greatly appreciated.