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  1. punchback

    My New Early Model PL400 w/ 4 Fin Heat Sink

    I've already met, so to speak, Joe. I bought a LED upgrade before I realized that I cannot use it on my early 400. He was very understanding of my mistake. I will check with him on the 400 face plate
  2. punchback

    My New Early Model PL400 w/ 4 Fin Heat Sink

    At WOA I only see faceplates for the 700 on the price list.
  3. punchback

    My New Early Model PL400 w/ 4 Fin Heat Sink

    I read about a diode latch up mod. Does this apply to all PL's including my early 400? Does back to back mean in parallel? Changing C6 to 470uf at 50 volts will flatten the lower frequency response considerably. Soldering two 1N4148's back to back on the back of the board to the leads of C6...
  4. punchback

    My New Early Model PL400 w/ 4 Fin Heat Sink

    The 400 boat has already sailed and I'm in it. I'm sure I'll never sell it anyway... Any opinions on the PS caps, bridge (and that bridge mod), and anything else that should probably be done right off the bat?
  5. punchback

    My New Early Model PL400 w/ 4 Fin Heat Sink

    First time posting in the Phoenix forums due to my recent acquisition. I've been jonesing for a Phase Linear for a long time. I mainly look on CL and I don't see them too often in the Cincinnati area. One popped up on CL that seemed a good price for an operational unit. So... I’m the proud...
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