K&K Audio / Lundahl Transformers

Re: Lundahl LL1660/5 in PP - Alt-M??

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In Reply to: Lundahl LL1660/5 in PP - Alt-M?? posted by andy evans on June 22, 2006 at 14:43:49:

The /PP transformers are gapped for about 5mA of net current when the primaries are in series, as you suggest. Alt M'' is a PP to PP connection for power amp interstage use, while Alt N is PP to line out connection for preamp use. The S transformers have a Faraday shield between primary and secondary to equalize the stray capacitances and provide somewhat better symmetry at high frequencies when the secondaries are used for PP applications such as in a power amp interstage. The performance differences are relatively minor.

Kevin Carter
K&K Audio
www.kandkaudio.com

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