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Audio and Video Talk
Valves / Vacuum Tubes
2019 DIY valve amp workshop in Pretoria?
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<blockquote data-quote="Mars" data-source="post: 918926" data-attributes="member: 817"><p>So, to get back to the preamp design: I am trying to stick to octal tubes in this design; but it is negotiable if alternatives are markedly better.</p><p></p><p>Here is a proposal for signal flow</p><p></p><p>RCA input --->6SL7-RCA-style-phono--->selector switch--->tone controls-RCA-6SN7--->volume control--->output to power amp</p><p></p><p>Question: Is a BALANCE control needed? Ampdog mentions tone control dual ganged pots tracking as an issue.</p><p></p><p><img src="http://oestex.com/tubes/P%20A/RCARIAA.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><img src="http://oestex.com/tubes/P%20A/RC19TC.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="Mars, post: 918926, member: 817"] So, to get back to the preamp design: I am trying to stick to octal tubes in this design; but it is negotiable if alternatives are markedly better. Here is a proposal for signal flow RCA input --->6SL7-RCA-style-phono--->selector switch--->tone controls-RCA-6SN7--->volume control--->output to power amp Question: Is a BALANCE control needed? Ampdog mentions tone control dual ganged pots tracking as an issue. [IMG]http://oestex.com/tubes/P%20A/RCARIAA.jpg[/IMG] [IMG]http://oestex.com/tubes/P%20A/RC19TC.jpg[/IMG] [/QUOTE]
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Audio and Video Talk
Valves / Vacuum Tubes
2019 DIY valve amp workshop in Pretoria?
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