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Turns out the issue was the ALC adjustment. Once I wiggled around with one of those pots the modulation came back on AM too. Wouldn't have thought they were so related. Modulation is working great. Since I had to wiggle back and forth a bit with the pots and since they wear out very quickly I went ahead and put some nail polish on em to hold them in place. The power pots also seem to have shifted in value since the last time I messed with them so those got polish too.

I'll go back to the transistors and try sanding the bottoms flat. They are getting hotter than what you recommended. About 160F. The heat sink is definitely present with the pads I added and when I unkey the temperature drops quite quickly, but with the pads the heat transfer just isn't fast enough.

[QUOTE="Tolteca, post: 633640, member: 52008"] Turns out the issue was the ALC adjustment. Once I wiggled around with one of those pots the modulation came back on AM too. Wouldn't have thought they were so related. Modulation is working great. Since I had to wiggle back and forth a bit with the pots and since they wear out very quickly I went ahead and put some nail polish on em to hold them in place. The power pots also seem to have shifted in value since the last time I messed with them so those got polish too. I'll go back to the transistors and try sanding the bottoms flat. They are getting hotter than what you recommended. About 160F. The heat sink is definitely present with the pads I added and when I unkey the temperature drops quite quickly, but with the pads the heat transfer just isn't fast enough. [/QUOTE]

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