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What the buck?

I've been reading in the archives about bucking transformers, and want to try one for a pair of Dynaco MkIII amps and a PAS I just took out of storage. They seem simple enough to configure, at least the example below does.




I've got a filament transformer I want to use, but it's not quite the two primary, two secondary wire variety shown above. The specs on the secondary are: Series: 12.6V ct@6.3A, Parallel: 6.3V@12.6A Here's the diagram:





When the primary is wired via the parallel 115 v, I measure 7 VAC between output taps 7 & 8 and 11 & 12, the parallel connections. Good so far. But what is throwing me is Note #2 from the spec sheet:





I asked one of our electrical techs at work today, and he seemed confused by note #2 as well. He drew up what he thought was the correct connection using both secondaries, but I'd like a few more opinions

My question is: How should this be wired to buck 6.3 V @ 12.6A?

Link to complete spec sheet is below.

Thanks.




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Topic - What the buck? - 1973shovel 19:21:18 05/18/12 (27)

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