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Old 14th April 2015, 12:19 PM   #1
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Default Best transformers orientation ?

Hi all !

it's my first tube amp project.
question for transformers orjentatsion, it is ok like this picture ?

Humax
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Old 14th April 2015, 02:22 PM   #2
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The 90 deg. orientation is fine. Is the surface you have everything on going to be the actual size of your top plate? If so, then spread the iron out. That's a lot of weight in a small area and depending on the type of tubes, there could be a fair amount of heat close to your iron. If it was my project, I'd also swap the capacitor and PT around... get the PT a little farther away from your outputs, but that's just me and how I build amps. The last several builds I've done, I've used a 17x10 chassis...lots of room to spread everything out.
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Old 15th April 2015, 04:51 AM   #3
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I'd agree with Denny. Also you may be able to mount your capacitor under the chassis.
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Old 15th April 2015, 05:29 PM   #4
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Like this ?
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Old 15th April 2015, 07:08 PM   #5
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The location of your transformers are fine, you've now brought some of the weight towards the front which is good.
I think you've now spread everything too far apart but that is just my personal view, if you're okay with a large chassis
then leave everything as is. You can move everything closer together if you prefer it. For example, the spacing
between two opt's can be a half inch. The distance from the edge of the pcb to the transformers can be reduced to
about one inch. Consider the size of chassis you're okay with.
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Old 15th April 2015, 09:04 PM   #6
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OK I got ready next set-up, it is ok now?
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Old 16th April 2015, 03:57 AM   #7
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This is how I did mine - quiet as can be (except for the music) until my PT died.

Charlie

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Old 16th April 2015, 05:59 AM   #8
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Quote:
Originally Posted by cbutterworth View Post
This is how I did mine - quiet as can be (except for the music) until my PT died.

Charlie

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Whay you PT died ?
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Old 16th April 2015, 12:25 PM   #9
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I don't know, but it got an internal short. I'll paint and install a new Hammond 374bx this weekend. I'll also ensure that I avoid leaving it idling with no music longer than a couple of minutes, to minimize stress on the pt.

Charlie
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Old 17th April 2015, 11:24 AM   #10
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Quote:
Originally Posted by cbutterworth View Post
I don't know, but it got an internal short. I'll paint and install a new Hammond 374bx this weekend. I'll also ensure that I avoid leaving it idling with no music longer than a couple of minutes, to minimize stress on the pt.

Charlie
I sold audio equipment in a high end McIntosh store in the 70's and I got used to transformers running at or near room temp. That said you should be able to leave the amp on until the cows come home without damage to anything other than the tubes accumulating hours. If I were choosing a Hammond transformer for the SSE I would use 373hx, but it is way over the top, so were those McIntosh trannies, that's why they ran cool.
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