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Yet another transformer orientation question
Yet another transformer orientation question
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Old 8th August 2019, 02:09 AM   #1
itsikhefez is offline itsikhefez  United States
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Yet another transformer orientation question
Default Yet another transformer orientation question

Hey all,

I read a bunch of the existing threads and yet was not able to find a conclusive answer.
With both PT and OPT vertical/upright, 90deg orientation to each other is understood.

I have ordered a PT from ISO and theirs is horizontal/laydown while my OPT's are the more common upright.

With the short side of the PT towards the OPT, is the correct orientation option A, or option B (attached photo).

Thanks!
Attached Images
File Type: jpg 2019-08-07 08.00.11.jpg (377.6 KB, 134 views)
File Type: jpg MS-3716-1-300x300 (1).jpg (31.1 KB, 139 views)
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Old 8th August 2019, 02:39 AM   #2
rayma is online now rayma  United States
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Option A.
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Old 8th August 2019, 02:45 AM   #3
wiseoldtech is offline wiseoldtech  United States
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Quote:
Originally Posted by rayma View Post
Option A.

That is correct, yep.
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Old 8th August 2019, 02:52 AM   #4
itsikhefez is offline itsikhefez  United States
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Yet another transformer orientation question
awesome thanks both
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Old 8th August 2019, 02:53 AM   #5
rayma is online now rayma  United States
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Originally Posted by itsikhefez View Post
awesome thanks both
You still want a reasonable amount of space between them.
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Old 13th August 2019, 07:02 PM   #6
itsikhefez is offline itsikhefez  United States
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Yet another transformer orientation question
Circling back to this, would appreciate feedback if there is a preference to either of these layouts.
-Dimensions are 16"x11.5"
-This is for a headphone amplifier. Volume and headphone jack are in the front right.
-Power transformer is similar to the one pictured.
-Bottom left is tomchr's 21st Maida Regulator
-Top plate will sit on top of wooden base and prefer all parts on top plate.
-RCA connectors are top right next to OPT

Generally, I prefer option 2. Centers of all transformers are aligned on-top and (unless I'm mistaken), the center axis of the PT is not "pointing" at the tubes or OPT's. The only thing I dislike about this is the position of the IEC inlet.

Option 1 puts the IEC inlet in a better position, but I'm not sure if the rotation of the PT is now an issue. Although, in this layout the PT is even further away from the OPT's.

Thoughts?
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File Type: png FPE-1.PNG (53.6 KB, 85 views)
File Type: png FPE-2.PNG (35.2 KB, 84 views)
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Old 13th August 2019, 10:06 PM   #7
wiseoldtech is offline wiseoldtech  United States
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Using a wood cabinet is fine.
However, it's good to line it with alumium, such as the flashing used for roofs, etc.
You want a total electrical shielding, top, bottom, all sides, to eliminate any stray hum in the system.
Of course these aluminum pieces must be electrically connected as one.
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Old 14th August 2019, 02:02 AM   #8
Rick PA Stadel is offline Rick PA Stadel  United States
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How 'bout keeping the orientation of the PT the same as Option 1, but moving it toward the front by the depth of the IEC? So the IEC would have the location of Option 2, but without rotating the PT to make room for it.

Just a thought.

Ooh, and +1 to wiseoldtech . And remember, aluminum 'skins over' immediately, so when you go to connect the sides to the top, put a sharp-edged lockwasher (or some such) in the 'sandwich' to make sure you're cutting through the thin but durable oxide film.

Regards,
Rick

Last edited by Rick PA Stadel; 14th August 2019 at 02:19 AM.
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Old 14th August 2019, 04:17 AM   #9
wiseoldtech is offline wiseoldtech  United States
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Quote:
Originally Posted by Rick PA Stadel View Post
How 'bout keeping the orientation of the PT the same as Option 1, but moving it toward the front by the depth of the IEC? So the IEC would have the location of Option 2, but without rotating the PT to make room for it.

Just a thought.

Ooh, and +1 to wiseoldtech . And remember, aluminum 'skins over' immediately, so when you go to connect the sides to the top, put a sharp-edged lockwasher (or some such) in the 'sandwich' to make sure you're cutting through the thin but durable oxide film.

Regards,
Rick

yeah Rick, those are "star lockwashers".
I use 'em all the time.
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Old 15th August 2019, 03:01 PM   #10
itsikhefez is offline itsikhefez  United States
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Yet another transformer orientation question
Thanks all for the feedback.
I have made some progress and am going with a chassis that will allow me to put the RCA and IEC inlet in the back. So no issues regards those anymore.

Not sure though if there are any preferences with regards to the transformer orientation in Option 1 vs Option 2. FWIW, option 2 seems to be used much more often and looks to be a more "standard" layout
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