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Old 2nd August 2007, 08:03 PM   #1
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Default Easy (well not for me) Transformer Question

I have a Hammond 160K12 transformer that has dual inputs and secondary's. I have attached the diagram. It is rated to put out 12.6v @ 800ma and 6.3v @1.6A. I am using it for a tube filament supply. How to I wire it to put out the 12.6v? I am assuming that I would connect the 115v to 1 and 4 bridge 2 and 3 on the input side and on the output side I would get 12.6 from 5 and 7 with 6 and 8 bridged. Is there any simple way that I could make it switchable between the 12.6 and 6.3?

Thanks in advance for help on this simple problem
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Old 2nd August 2007, 08:13 PM   #2
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put the primaries in parallel for 115 volt operation, and put the secondaries in series to get 12.6v. You could wire up a series/parallel switch, but unless it's for a test supply i don't think you'd gain much by being able to switch.
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Old 2nd August 2007, 08:32 PM   #3
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Thanks I will wire it up as such to get the 12.6 volts. I think I figured out what was confusing me so badly. The diagram that I have showing how to hook it up in parallel or series changes the pin out order in each diagram.

It is for a test supply. I have a couple of different preamps and one takes 6.3 and the other 12.6 for the heaters and instead of changing the jumpers on the 6.3 every time I thought I could make a switch on the supply.

What part of Toronto are you in? I am just down the road in Burlington/Oakville

Thanks!
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Old 2nd August 2007, 11:06 PM   #4
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Well I wouldn't say toronto, I actually live in Woodbridge. toronto's just a reference point for non-ontarians...
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Old 5th August 2007, 03:52 AM   #5
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Click the image to open in full size.

Hope this helps.
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Old 6th August 2007, 01:39 PM   #6
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Thanks so much! Thats exactly what I was looking for.
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