Joe, I have been camped out in my shop and assembling all the goodies you shipped to me. Thanks a bunch. I love the BABB and the snubber board, top notch gizmos there buddy. You continue to amaze me (Although I am entertained by watching bread go moldy soooooo)
I spaced it and ran out of bridge rectifiers so I ordered some and in the mean time, I slipped an old one in there just so I could finish some testing and It was weird. I fired up the Dumb Bulb and the light stayed bright so I tore into the amp and I went back to the Back Plane bring up (after I removed the back planes and put a different set in there to verify everything, wiring was spot on. DBT was good. I installed the Control Board, still good. As soon as I hooked up the DCP, bulb stayed bright again. I unhooked the AC wires to the DCP, still bright (the outputs are grounded), unhooked the ground wires from the DBT...... Went dim. I used the DCP out of my system amp and it still stayed bright so the DCP is doing it's thing.... I think the bridge rectifier was AFU (it ohmed out lower than an exact same rectifier in my parts pile. It was only putting out a few volts DC until I unloaded the AC by removing the good DCP's and the voltage sprang back up and the bulb went dim.
These amps got here with the 50 Watt Zoebel resistors exploded, shit melted etc... So maybe the bridge Rectifier was starting to show issues. I haven't seen one go bad but I'm sure they do. I should have looked at the signal with the Oscope but my friend I grew up with showed up with beer........ Game over... I'll test the transformer and put it under a load and see what it does. I noticed the hold down screw for the bulk cap strap had backed down into the cradle, maybe it damaged the transformer wiring????
I spaced it and ran out of bridge rectifiers so I ordered some and in the mean time, I slipped an old one in there just so I could finish some testing and It was weird. I fired up the Dumb Bulb and the light stayed bright so I tore into the amp and I went back to the Back Plane bring up (after I removed the back planes and put a different set in there to verify everything, wiring was spot on. DBT was good. I installed the Control Board, still good. As soon as I hooked up the DCP, bulb stayed bright again. I unhooked the AC wires to the DCP, still bright (the outputs are grounded), unhooked the ground wires from the DBT...... Went dim. I used the DCP out of my system amp and it still stayed bright so the DCP is doing it's thing.... I think the bridge rectifier was AFU (it ohmed out lower than an exact same rectifier in my parts pile. It was only putting out a few volts DC until I unloaded the AC by removing the good DCP's and the voltage sprang back up and the bulb went dim.
These amps got here with the 50 Watt Zoebel resistors exploded, shit melted etc... So maybe the bridge Rectifier was starting to show issues. I haven't seen one go bad but I'm sure they do. I should have looked at the signal with the Oscope but my friend I grew up with showed up with beer........ Game over... I'll test the transformer and put it under a load and see what it does. I noticed the hold down screw for the bulk cap strap had backed down into the cradle, maybe it damaged the transformer wiring????