K&K Audio / Lundahl Transformers

Posted by KevinC (M) on June 20, 2006 at 14:37:57

In Reply to: OK after playing with the math a little bit.... posted by thermionic addictions on June 20, 2006 at 11:24:40:

As with most things, to get a little of this you have to give up a little of that. If you keep increasing the inductance, either through more turns of wire or through using a larger core, you will inevitably increase the amount of stray capacitance and start seeing aberations in the high frequency response. I typically am very satisfied with a single stage low frequency cut-off (-1dB) of 5-10Hz. Incorporating that into a multi-stage amplifier might change my opinion, though, due to the desire to stagger roll-offs a bit.

Of course there are probably others who think differently, but I don't give too much weight to DCR with plate chokes. Obviously, the choke has to be designed to carry the DC current without too much heating. That is usualy enough to preclude too much DCR.

Kevin Carter
K&K Audio
www.kandkaudio.com

• Very cool kevin. Thanks for the excellent answers. (nt) - thermionic addictions 14:55:20 06/20/06 (0)

Post a Followup: