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Old 26th June 2012, 02:50 PM   #21
rodolfo is offline rodolfo  Mexico
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silver1omo see you inbox please
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Old 26th June 2012, 03:41 PM   #22
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this is a 4x21V + 2x15V transformer. two and two sec. are internaly wired in series.
then you get 2x42V and a midpoint betwin the sec. where you get 2x21V
black is sentertap. the blue-black wires are the midpoint betwin those 2 sec. red-black wires are 2 sec in series
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Old 26th June 2012, 04:01 PM   #23
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Thanks AudioSan, that was my guess, and really needed confirmation
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Old 27th June 2012, 02:07 AM   #24
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Quote:
Originally Posted by AudioSan View Post
this is a 4x21V + 2x15V transformer. two and two sec. are internaly wired in series.
then you get 2x42V and a midpoint betwin the sec. where you get 2x21V
black is sentertap. the blue-black wires are the midpoint betwin those 2 sec. red-black wires are 2 sec in series
What do you think of separating the secondaries to get 2x 21v-0-21v?
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Old 27th June 2012, 02:44 AM   #25
gootee is offline gootee  United States
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Quote:
Originally Posted by silver1omo View Post
What do you think of separating the secondaries to get 2x 21v-0-21v?
It looks like maybe it was made for that.

What does the PCB tell you about that?

And what does it tell you about current capacities?
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Old 28th June 2012, 09:11 PM   #26
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Quote:
Originally Posted by gootee View Post
It looks like maybe it was made for that.

What does the PCB tell you about that?

And what does it tell you about current capacities?
I no longer have the amp PCB... The AC PCB has a 4A fuse (T4AL250) and the amp PCB had a couple of 5A fuses (T5AL250).

Last edited by silver1omo; 28th June 2012 at 09:16 PM.
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Old 28th June 2012, 10:41 PM   #27
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Quote:
Originally Posted by silver1omo View Post
What do you think of separating the secondaries to get 2x 21v-0-21v?
no. that will require opening up the transformer and cut the winding at the centertap and split it in two.
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Old 28th June 2012, 10:54 PM   #28
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Originally Posted by AudioSan View Post
no. that will require opening up the transformer and cut the winding at the centertap and split it in two.
I took a close look, won't need to cut the winding, just de-solder a pair of wires.
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Old 28th June 2012, 11:05 PM   #29
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okei. so there is 4 sec. solderd togheter on terminals on the bottom of the transformer?
in that case, it's all good
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Old 28th June 2012, 11:34 PM   #30
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One red, one blue (pair of wires) and one side of the black (pair of wires) are a yellowish emmanel wire the other red, blue (pair of wires) and side of the black (pair of wires) are redish emmanel wire.So it looks like it does have 4 secs and can be split to 2 center tapped 21/0/21.
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