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RE: New K&K ST70 power transformer question




The new series PC board will support both the lower voltage "stock" power transformers and the new high voltage/current transformer. The specific goal of the new board was to accommodate a 550VDC supply with KT-120s running at 70mA each. The improvement in sound quality is pretty substantial. It's even more substantial if you fit a pair of Lundahl LL1682/PP outputs (for 4 ohms) or LL1663/PP (for 8 ohms). I just finished fitting my upgraded prototype new board unit with LL1682/PPs and before they are even broken in they are another big improvement over stock ST-70 transformers. The new Lundahl transformer covers for these outputs made that possible. A picture is attached showing this amp. The chassis is a Triode Electronics chassis, otherwise the parts are all K&K Audio sourced.


Kevin Carter
K&K Audio
www.kandkaudio.com


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