I have started building the Pass PLH project but stumbled on Papa's suggestion to make P2 a 2-5W trimmer resistor, which part is suggested for this. I can't find trimmer resistors this high? Also, what about R6 wattage? is it OK as a 1/2w or 1W resistor?
Also, can I use 27V power supplies like in the JLH version? Is there any mods I have to do to use lower voltage supply?
Also, can I use 27V power supplies like in the JLH version? Is there any mods I have to do to use lower voltage supply?
PLH was my first first watt, and has a special place in my heart. More/all amplifiers should have knobs on them. I used something like this one potentiometer. All point to point, and nearly the entirety of mine was from surplus stores as a point. I had little idea what I was doing and kept a harbor freight magnetic bowl where I kept all my "dead soldiers" as my mosfets kepts overheating. If I jiggled any wire too much there would be sparks. But for all its eccentricities, I had never heard anything so incredible and spent several thousand hours listenting and fiddeling.
Part of R4 and part or all of and P2 see the full AC output of the amp, I believe why they are specced higher. My R6 was same little ones I used for gate resistors without issues. I also seem to remember there was a typo in the firstwatt article for one of the values which was pointed out in the PLH thread, but I can't seem to find it. Maybe i'm imagining it 🙁
Part of R4 and part or all of and P2 see the full AC output of the amp, I believe why they are specced higher. My R6 was same little ones I used for gate resistors without issues. I also seem to remember there was a typo in the firstwatt article for one of the values which was pointed out in the PLH thread, but I can't seem to find it. Maybe i'm imagining it 🙁
