6B4G Single Ended
Amplifier built with directly heated triode is one that gives a perfection of sound and is considered to be an art of audio technique. Best known output tube is 2A3 directly heated triode. 6B4G belongs to family of 2A3 electronic tubes with difference in base and filament voltage, all other characteristics are identical. As driver E280F HQ gold pin Siemens pentode in triode connectedwas used. Output tube is 6B4G Electro Harminx monoplate. Rectifier realization was achieved by using 5U4GB rectifier tube and then filtered through CLC filter. To achieve better quality I used Nipon capacitor with parallel thigh MKP capacitors. Output transformer and choke were wounded on C core. Amplifier’s wooden casing is handmade from stained oak wood. Complete electronics is fixed on 3mm steal plate. As the output strength of this amplifier is small I would advice speakers of at least 90dB sensitivity. Features:
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