K&K Audio / Lundahl Transformers

Posted by KevinC (M) on July 03, 2006 at 04:06:52

In Reply to: LL1661 p-p transformers posted by thermionic addictions on July 2, 2006 at 15:41:27:

The LL1661/PP can be used with up to 5mA of net DC current flowing through the primary windings when they are all in series, so you could do this running at the databook operating points (180-250v, 5-6mA). I would recommend wiring the primary side like the primary side of the LL1660 Alt S and the secondary side like the primary side of Alt T. This will give you a 2:1 stepdown, leaving about 12dB of gain. If you can tolerate near 0dB of gain, then wire the secondary side like the secondary side of Alt Q. This will give you a lower output impedance.

Note that the pin-out of the secondary of the LL1661 is identical to that of the primary.

Kevin Carter
K&K Audio
www.kandkaudio.com

• Thanks Kevin. I will try this and see how it turns out. - thermionic addictions 12:10:25 07/03/06 (0)

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