K&K Audio / Lundahl Transformers Welcome! Need support, you got it. Or share youe ideas and experiences. |
|
In Reply to: Pictures of My ST-70 posted by seanzozo on January 16, 2012 at 15:32:39:
Thanks Sean. Most of us could take lessons on wiring from you!
I will take this opportunity, since you kindly provided it, to announce that there will an upgrade for the ST-70 kit available in about 3 weeks. It is complelely retrofittable and consists of 2 PC boards that attach underneath to the front screws that secure the 2 output transformers. The boards replace the 2 x 12.5K 5w resistors and 2 x 22uF 450V caps that decouple the B+ supply to the front end. The new circuit is a shunt regulator that provides a very stable power source for the input stage and allows us to increase the value of the plate load resistors to get better linearity in the front end. Expect to hear more dynamic contrast across the frequency band and better delineation of detail. The price has not been set, but it will be modest.
Kevin Carter
K&K Audio
www.kandkaudio.com
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- RE: Pictures of My ST-70 - KevinC 16:12:31 01/16/12 (2)
- Nice! - twystd 23:21:19 01/18/12 (0)
- RE: Pictures of My ST-70 - D Mike 12:58:08 01/18/12 (0)