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6N1 preamplifier with phono
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<blockquote data-quote="Mars" data-source="post: 708098" data-attributes="member: 817"><p>Thanks all to the useful comments. Much appreciated :thumbs:</p><p></p><p>The CCDA did not want to balance out with equal amounts of current running through the two triodes. I went back to the more simple option, as shown in the circuit diagram above, of parallel triodes in grounded cathode formation. I think the gain is a bit high; the phono preamp hiss is quite audible. Voltages have jumped up a bit, since the CCDA run quite a bit more current. </p><p></p><p>Effectively the power supply is a C-R-C design, as simple as you get. I do not like solid state voltage regulation, preferring good capacitors and resistors for a more musical experience. That is the reason for the MKP caps in the phono preamp section.</p><p></p><p>I was worried I would get hum on the preamp output. I am listening to the preamp now, and it sounds clear and lovely. Preamps are really good for improving the listening experience of youtube videos! My Dell tower internal sound card needs all the help it can get. </p><p></p><p>The phono is playing both channels. We'll test with turn table tomorrow.</p></blockquote><p></p>
[QUOTE="Mars, post: 708098, member: 817"] Thanks all to the useful comments. Much appreciated :thumbs: The CCDA did not want to balance out with equal amounts of current running through the two triodes. I went back to the more simple option, as shown in the circuit diagram above, of parallel triodes in grounded cathode formation. I think the gain is a bit high; the phono preamp hiss is quite audible. Voltages have jumped up a bit, since the CCDA run quite a bit more current. Effectively the power supply is a C-R-C design, as simple as you get. I do not like solid state voltage regulation, preferring good capacitors and resistors for a more musical experience. That is the reason for the MKP caps in the phono preamp section. I was worried I would get hum on the preamp output. I am listening to the preamp now, and it sounds clear and lovely. Preamps are really good for improving the listening experience of youtube videos! My Dell tower internal sound card needs all the help it can get. The phono is playing both channels. We'll test with turn table tomorrow. [/QUOTE]
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Commercial Members
Commercial Members - News & Discussion
6N1 preamplifier with phono
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