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PostPosted: Mon Mar 21, 2005 4:21 am 
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Joined: Fri Mar 18, 2005 6:08 am
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Location: Melbourne, Australia
:D This is probably of more interest for those of us that have 240v or 220v mains power .. :wink:
I emailed Dave West about the PT/OT wiring diagram on his website, in order to confirm whether a 240v tap was configurable on his PT (his website only showed 220v and 110v taps). He was very helpful and has updated the website to show the 220v and 240v wiring options.

Barry M

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 Post subject: Parallel and series
PostPosted: Mon Mar 21, 2005 8:16 pm 
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Location: San Jacinto, CA
Generally, when there are multiple primary windings, they are used in parallel or series to get the correct input voltage. Typical is 100/120/220/240V. To get 240V in this example, you would run the 2 120v windings in series and bury the rest of the leads not used. Bob Wood, Transformer Design and Supply, San Jacinto, CA


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PostPosted: Mon Mar 21, 2005 10:18 pm 
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:D Thanks Bob .. yeah .. there are five primary wires (black, black/white, brown, brown/white and violet/white). For 240v you need to join the black & brown/white wires & cap, cap the violet/white (which goes unused) then use the brown and black/white for the primary connections. For 220v, its the same except the violet/white is joined with the black and brown/white is capped. For 110v, the brown & brown/white and joined for one primary connection and black & black/white joined for the other connection (with violet/white unused & capped) .. :roll:
Hope that makes some sense .. :?

Barry M

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 Post subject: Yep!
PostPosted: Tue Mar 22, 2005 12:37 pm 
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Makes perfect sense. Sounds like you have it. Enjoy your amp! Bob

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