highlander52 wrote:Nothing is closer than 2" to anything else so I think I'll be fine but my OPTs are perpendicular to each other
I see your sketch now. You've got so much space around everything, I can't imagine you will have any kind of magnetic interference. With two inches of separation, I'd expect you can orient anything pretty much any way you want and there shouldn't be problems.
You are going to end up with a rather large chassis, and the visual aesthetics are going to be a bit unconventional. Builders usually prefer to keep both the outputs arranged the same way just for some kind of sense of symmetry. But, it is your amp - feel free to build it any way you like.
I understand your dilemma. My Stereo 35 has no choke, so it seemed pretty obvious to keep all three transformers in a row. The PT goes one way, the OTs go the other, and everyone is happy. With a "four iron" chassis, now you've got the choke to complicate things. I've often seen these kinds of amps laid out with the PT - OT - OT in a row along the back. The choke goes on the side, right in front of the PT. Choke and OTs are all facing the same way, and the PT is turned 90 degrees.
Of course, I also suspect you are trying to keep the OT close to their terminal connections at the board. You could look at the get*set*go layouts for inspiration, because Shannon used a similar terminal layout on that board (power in the back, inputs on the front, finals out the sides). Then again, many of the GSG builds have the choke hidden away under the chassis. You don't really want to do that with a 193J.
Keep thinking... I'm sure you'll find the right solution.
"It's a different experience; the noise occlusion, crisp, clear sound, and defined powerful bass. Strong bass does not corrupt the higher frequencies, giving a very different overall feel of the sound, one that is, in my opinion, quite unique."