In Reply to: You might want to switch the phase of the AC power posted by Ralph on June 3, 2025 at 09:46:14:
The stereo amplifier I built a couple years ago called for the PT and OPTs to be positioned relatively close to each other. Before cutting the chassis, I tested the coupling this by powering the PT and moving the OPTs around on the bench. It turned out that the best null was produced when the OPTs were not only at 90°, but also positioned slightly in front of the PT. There's no way to know things like this unless you physically test them. Reversing phase is like that too, you just have to try it.
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Follow Ups
- Good idea! - Triode_Kingdom 10:04:30 06/03/25 (0)