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  1. Chafoweeth

    DBT not dimming

    That must have been all there was. Everything is looking great now. .1 mV DC offset on both channels and the un-adjusted bias is ~ .193V for the left and ~ .183 V for the right. Thanks again for your help and patience!
  2. Chafoweeth

    DBT not dimming

    Thanks for the help! I will work on getting those swapped. Here is the wiring that I had:
  3. Chafoweeth

    DBT not dimming

    The DBT is 100W The bias voltage and the DC offset for the channels are about the same. The bias was measured between the bias test point and the ground test point. The DC offset was measured across the terminals of the protection board before the relay. For the Left it is ~1.8V For the Right...
  4. Chafoweeth

    DBT not dimming

    Nope, nothing connected to any of the inputs or outputs.
  5. Chafoweeth

    DBT not dimming

    It is. They are both fully counter-clockwise.
  6. Chafoweeth

    DBT not dimming

    I am installing a new control board into my PL400. I misinterpreted the wiring diagram on the 1st run and my DBT light dimmed a little after the caps charged, but stayed bright. I *think* my miswiring was pretty benign; there certainly was no smoke, but the unfused b+ and the ground were hooked...
  7. Chafoweeth

    No flames... but we tried.

    It looks like it was just the fuse. Its back up and running! I did notice something while testing it though. One of the meters has always been a little slow, but it does its thing and I've never been too worried about it. I noticed that it didn't move at all while I was sending a steady sine...
  8. Chafoweeth

    No flames... but we tried.

    Well, the fuse was certainly blown. Not sure if this counts as nuclear, but this is what I found. It also looks like its a 5A fuse. I am having a little trouble finding a consensus on what the fuses should be, but no where have I seen a 5A being the right value for a 120VAC unit. It should be an...
  9. Chafoweeth

    No flames... but we tried.

    Thanks, I like how the case turned out, but the design included some vents in the back that we never got around to. Up until this weekend, I have had the amp warm, but never *hot*. It was definitely hot when I got over to check on it. I really didn't think they would be able to blow it up, or I...
  10. Chafoweeth

    No flames... but we tried.

    I have an older PL400 (4 fins) in which I have installed the capacitor upgrade, LEDs, and the WattsAbundant protection circuit. I did not intend to do a full back-plate, but I just ordered a new control board so that I could get some experience with that while I search for a 700b to go all in...
  11. Chafoweeth

    PL400 Busbar

    Hopefully this is the right place to post this. I am working on adding the White Oak capacitor kit to a PL400. My 400 just used a bit of wire soldered between the caps as a busbar as opposed to a plate that was screwed to the capacitor terminals. Since I am going to have to lengthen some wires...
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