Upgrade your 5Y3-tubed amplifier setup with the drop-in 5Y3S amp tube from Ruby Tubes! 5Y3S is an octal rectifier diode with a true directly heated cathode. Expert-designed for ultimate reliability and efficiency, this octal rectifier diode boasts a true directly heated cathode to ...Upgrade your 5Y3-tubed amplifier setup with the drop-in 5Y3S amp tube from Ruby Tubes! 5Y3S is an octal rectifier diode with a true directly heated cathode. Expert-designed for ultimate reliability and efficiency, this octal rectifier diode boasts a true directly heated cathode to deliver dynamic and robust performance.
Get the Ruby Tubes 5Y3S today and hear the difference that quality makes!
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