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  • en TDA7439 tone control

    Description: Browsing through the Elektor magazine my brother found an interesting tone control based on Sony IC, but it was impossible for us to find this IC in any...
  • en 6c33 single ended triode amplifier

    Description: My brother and I have build two 6C33 SET (single ended triode) 15 Watt Class A amplifier. This is a very nice amplifier with a very pleasant warm...