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RE: Pictures of My ST-70

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


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  • RE: Pictures of My ST-70 - KevinC 16:12:31 01/16/12 (2)

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