K&K Audio / Lundahl Transformers

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K&K Audio / Lundahl Transformers

Re: LL1660S Anomaly

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Kyle K

(A)

In Reply to: Re: LL1660S Anomaly posted by KevinC on May 1, 2006 at 05:07:08:

"In your particular case, I suspect that the resonances are made worse by the fact that you are using the transformer to step-up signal levels (effectively 1:1+1). For the best sound, as well as the resonance issue, I find it best to use the IT 2:1+1."
Kevin,
How would you hook up the LL1660S to do this?
Thanks,
Kyle

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Re: LL1660S Anomaly - KevinC 09:31:33 05/01/06 (2)
Hook up the primary (2.25+2.25) in series: B+ to pin 15, pin 16 soldered to pin 21, pin 20 to driver tube plate, and the secondary as connection Alt A.

Kevin Carter
K&K Audio
www.kandkaudio.com
- Re: LL1660S Anomaly - Kyle K 11:16:47 05/01/06 (1)
  Does this affect the recommended DC current rating (primary DC current for .9 Tesla).
  Thanks,
  Kyle
  - Re: LL1660S Anomaly - KevinC 14:35:30 05/01/06 (0)
    Yes. Because you are running the current through the windings in series, the rating printed on the transformer label is the operative one.
    
    Kevin Carter
    K&K Audio
    www.kandkaudio.com

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