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Old 9th December 2003, 03:59 PM   #1
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Default Connection of Transformers

I have two 18v-0-18v 160VA transformers and i want to connect them together to get 18v-0-18v and 320VA. they both are the same make/model etc. they both have dual secondries. should i use dual bridges?
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Old 9th December 2003, 04:30 PM   #2
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sorry about the double post, i took to long to edit the first one.

can i just parrallel them like this? (each secondary parralleled to the respective one on the other trasformer)
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Old 9th December 2003, 04:52 PM   #3
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As I understand it, if you hook them up that way there can be some issues with one transformer feeding power into the other at times, You would be better off to hook them up after the rectifiers I think.
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Old 9th December 2003, 04:54 PM   #4
GregGC is offline GregGC  Canada
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Default Re: Connection of Transformers

Quote:
Originally posted by Matttcattt
I have two 18v-0-18v 160VA transformers and i want to connect them together to get 18v-0-18v and 320VA. they both are the same make/model etc. they both have dual secondries. should i use dual bridges?

I'd use separat bridges and PS caps. One transformer per chanel. Theis way no interference between the chanels and the amps always see 1000.0 uF per rail (If 1000uF is your choice).
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Old 9th December 2003, 05:35 PM   #5
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Default Re: Re: Connection of Transformers

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Originally posted by officeboy
As I understand it, if you hook them up that way there can be some issues with one transformer feeding power into the other at times, You would be better off to hook them up after the rectifiers I think.
can i just connect it up after the rectifiers?

Quote:
Originally posted by GregGC
I'd use separat bridges and PS caps. One transformer per chanel. Theis way no interference between the chanels and the amps always see 1000.0 uF per rail (If 1000uF is your choice).
my amp will have 6 channels (as posted in another thread).
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Old 9th December 2003, 05:45 PM   #6
Vigier is offline Vigier  Netherlands
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OK,

then you can attach 3 amplifiers to the first transformer en the other 3 amplifiers to the second transformer. (Just like GregC said, but then 3 amplifiers for each transformer)

I don't know what the other thread is, but

if it's for a 5.1 amplifier:
Transformer 1: Front-Left, Rear-Left, Front-Center
Transformer 2: Front-Right, Rear-Right, Sub

if it's for stereo, but tri-amped:
Transformer 1: all channels for left
Transformer 2: all channels for right.
You could also use Transformer 1 to feed the bass-amplifiers for both speakers, and Transformer 2 for mid & high of both the speakers.

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Old 10th December 2003, 08:19 AM   #7
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i have already built the amplifier and all the channels' power rails are connectted together. will office boy's suggestion work?
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Old 10th December 2003, 08:55 AM   #8
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Well yes insjhort it will...however you get better seperation using seperate supplies for ur Amps...
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Old 10th December 2003, 11:32 AM   #9
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ok, ill just connect them after the bridges.
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Old 10th December 2003, 11:46 AM   #10
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matt if I may make a suggestion......connect them after the bridge but place some current limiting resistors in before each bridge.....that way both transformers will only draw their rated load



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