I wish every circuit was this interesting to watch.
By the way this is the easiest method of adjusting the trimmer for optimal performance. Connect chanel 1 of the oscilloscope to the input and channel 2 to the output of the phasing stage (pin1 IC2). Use a test frequency of a few hundred Hz (lower frequencies don't phase as much), adjust the trimmer until you get maximum horizontal travel of the wave on channel 2
"I've used Barry's circuit boards and they are great! They are cleanly etched and the board itself is thick. They take desoldering & reflowing well without damage. He holds h..."
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