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Old 23rd September 2003, 03:20 PM   #11
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Quote:
Will proceed with my 0-14V solution and try to get rid of the heat.
You could still go for the "passive" 5VDC solution as well? What is the problem there? Many report that it sounds better than regulated.

Cheers,
Bas
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Old 23rd September 2003, 03:21 PM   #12
moamps is offline moamps  Croatia
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Quote:
Originally posted by dhaen
Good idea (again) moamps

Thanks, John!
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Old 23rd September 2003, 04:03 PM   #13
Ralph is offline Ralph  Netherlands
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Hi moamps

Quote:
If your secondary 5V is unused, connect them serial and out of phase with 14V secondary. You will get 14-5=9V AC on bridge. Strange idea but works.
Interesting but I don't fully understand yet

I have two secondaries, 2.5-0-2.5 and 0-14V. Let's give them a letter for identification.

wire A: 2.5V
wire B: 0V
wire C: 2.5V

wire D: 0V
wire E: 14V

Which wires should I connect together now?

Thanks very much,

Ralph
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Old 23rd September 2003, 04:08 PM   #14
dhaen is offline dhaen  Europe
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Ralph:

Link A to D
Connect C and E to the bridge rectifier.

You can subtract as well as add voltages..

Cheers,

Edit:
Oops. Of course it depends on the phase of the 5v winding.
You may need to:
Link C to D
Connect A and E to the bridge rectifier
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Old 23rd September 2003, 04:13 PM   #15
dhaen is offline dhaen  Europe
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Ralph,

You'll have to do this by trial and error, I think.
Don't connect to the bridge rectifier until you are sure.
In one phase the voltages will add, in the other they'll subtract; that's the one you want.

Cheers,
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Old 23rd September 2003, 04:13 PM   #16
Ralph is offline Ralph  Netherlands
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Hmm sounds scary but will try it. Connect B to ground or just leave it alone? And I can just connect either configuration and check with a multimeter, right?
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Old 23rd September 2003, 04:19 PM   #17
dhaen is offline dhaen  Europe
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Default It's not scary

Ralph,

Don't connect any transformer terminals to ground.

Cheers,
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Old 23rd September 2003, 04:20 PM   #18
dhaen is offline dhaen  Europe
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Yes, just use the multimeter to start with.
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