I measured between the PS cap terminals tonight and got 198DCV. You said you were getting close to 300DCV. Correct? I confirmed I have the blue w/red strip hooked up to the rectifier. What choke are you using? I went with the 193C. Did you get the LED dimming problem sorted out? If you went with the Belden cable, be sure only one end of the connection is grounded. It sounds like your losing current to the ground. Look for nicks or cuts in the cables's wrap. Also, test continuity between the signal path and ground, there should be none.
PLEASE give me a call.....Colin