Can you stack torroidal transformers?

Dominick22 · 19th February 2006, 08:25 PM

I want to stack 2 22V 400 VA transformers to save on internal component space. Building up in some areas instead of out!!

Will this cause a magnetic or other problem between the two transformers????

Is there ANY reason not to do it???

Thanks,

Dominick

neutron7 · 19th February 2006, 08:33 PM

as long as there is no circuit around either of them it will be fine.

by circuit i mean a conductive path that gos through the middle of the transformer(s) and back on itself.

this would count as a "winding" and bad things could happen.

Bazukaz · 19th February 2006, 09:19 PM

I would't do this , because tranformers will dissipate heat much worse.

Zen Mod · 19th February 2006, 09:54 PM

Quote:

Originally posted by Bazukaz
I would't do this , because tranformers will dissipate heat much worse.

with chip amp's consumption?
hardly

jacco vermeulen · 19th February 2006, 10:06 PM

Care to see a picture of stacked transformers in a Class A amplifier ?

Dominick22 · 20th February 2006, 12:42 AM

I would love to see pics of this application if anyone has some.

Dominick

cowanrg · 20th February 2006, 01:13 AM

if i remember right, boulder amplifiers stacks their transformers for their big amps. they have a pair of 2kva's in there.

quasi · 20th February 2006, 01:49 AM

I've stacked toroids before without any problems. As far as heat goes, a transformer in an audio application never gets close to it's maximum heat dissipation. For example; A transformer rated at 500va probably only delivers around 150va average power even in the most demanding music application. This is because of the dynamic rather than average nature of music. The reason large transformers are used is to maintain a better voltage regulation.

If the amplifier is class A then the average heat will be higher, but in class A you would want to use a larger transformer anyway.

So stack away, just be mindful that the top of the central bolt must not touch the case.

Cheers

Scratchy · 24th September 2010, 09:12 PM

Quote:

Originally Posted by Dominick22

I would love to see pics of this application if anyone has some.

Dominick

Here you go:

benb · 25th September 2010, 02:10 AM

Is this considered a significant advantage for a "dual mono" design over a single toroid of twice the power rating with two sets of secondary windings?

Thinking in the other direction, the ultimate in dual mono would include a double-pole power switch switching two power cords, one for each toroid.

Now that I've said it, I have no doubt someone will build it,

19th February 2006, 08:25 PM	#1
Dominick22 diyAudio Member Join Date: Aug 2005	Can you stack torroidal transformers? I want to stack 2 22V 400 VA transformers to save on internal component space. Building up in some areas instead of out!! Will this cause a magnetic or other problem between the two transformers???? Is there ANY reason not to do it??? Thanks, Dominick __________________ A real amateur enthusiast!

19th February 2006, 10:06 PM	#5
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	Care to see a picture of stacked transformers in a Class A amplifier ? __________________ Looks like Sponge Bob has killed another thread.

20th February 2006, 12:42 AM	#6
Dominick22 diyAudio Member Join Date: Aug 2005	I would love to see pics of this application if anyone has some. Dominick __________________ A real amateur enthusiast!

20th February 2006, 01:49 AM	#8
quasi diyAudio Member Join Date: Sep 2004 Location: Adelaide, Australia	I've stacked toroids before without any problems. As far as heat goes, a transformer in an audio application never gets close to it's maximum heat dissipation. For example; A transformer rated at 500va probably only delivers around 150va average power even in the most demanding music application. This is because of the dynamic rather than average nature of music. The reason large transformers are used is to maintain a better voltage regulation. If the amplifier is class A then the average heat will be higher, but in class A you would want to use a larger transformer anyway. So stack away, just be mindful that the top of the central bolt must not touch the case. Cheers __________________ http://sites.google.com/site/quasisdiyaudiosite/

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19th February 2006, 08:33 PM	#2
neutron7 diyAudio Member Join Date: Dec 2003 Location: Toronto Canada	as long as there is no circuit around either of them it will be fine. by circuit i mean a conductive path that gos through the middle of the transformer(s) and back on itself. this would count as a "winding" and bad things could happen.

19th February 2006, 09:19 PM	#3
Bazukaz diyAudio Member Join Date: Nov 2005 Location: Vilnius	I would't do this , because tranformers will dissipate heat much worse.

20th February 2006, 01:13 AM	#7
cowanrg diyAudio Member Join Date: Apr 2002 Location: Lafayette, CO	if i remember right, boulder amplifiers stacks their transformers for their big amps. they have a pair of 2kva's in there.

25th September 2010, 02:10 AM	#10
benb diyAudio Member Join Date: Apr 2010	Is this considered a significant advantage for a "dual mono" design over a single toroid of twice the power rating with two sets of secondary windings? Thinking in the other direction, the ultimate in dual mono would include a double-pole power switch switching two power cords, one for each toroid. Now that I've said it, I have no doubt someone will build it,

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